Log in

Relevant bibliographies by topics / Discharge chamber / Journal articles

To see the other types of publications on this topic, follow the link: Discharge chamber.

Journal articles on the topic 'Discharge chamber'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Discharge chamber.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Булат, П. В., К. Н. Волков, И. И. Есаков, П. Б. Лавров, and А. А. Раваев. "Электродинамическая модель камеры сгорания, использующей инициированный подкритический стримерный разряд для поджигания топливной смеси." Журнал технической физики 92, no. 5 (2022): 676. http://dx.doi.org/10.21883/jtf.2022.05.52371.1-22.

Full text

Abstract:

Various electrodynamic models of a combustion chamber, in which an initiated subcritical streamer discharge is used to ignite a combustible mixture, are considered. To localize the discharge in the working chamber, discharge initiators are used based on half-wave electromagnetic vibrators with resonant properties. The dependences of the structure of the electric fields that form the discharge on the geometric parameters of the discharge initiator are obtained on the basis of numerical calculations, and the issues of matching the chamber with the radiation generator are considered. Comparison of the calculation options for different positions of the initiator of the discharge in relation to the optical centreline of the camera. Possibilities for further enhancement of the field in the working zone at the poles of the microwave discharge initiator, which is required for the formation of discharges with a developed streamer structure at elevated gas pressures in the combustion chamber, are discussed. The ways of increasing the resulting electromagnetic field in the area of vibrators for the formation of discharges with a volumetric structure have been determined.

APA, Harvard, Vancouver, ISO, and other styles

2

Bereka, V. O., and I. P. Kondratenko. "MATCHING OF COMPATIBLE WORK OF SHORT HIGH-VOLTAGE PULSES OF TENSION GENERATOR AND WATER TREATMENT CHAMBER BY DINT OF PULSE BARRIER DISCHARGE." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2021, no. 60 (December 10, 2021): 21–27. http://dx.doi.org/10.15407/publishing2021.60.021.

Full text

Abstract:

A technique for calculating the parameters of a magnetic switch as an element of a generator of short high-voltage pulses of tension to coordinate its compatible work with a water treatment chamber by dint of pulse barrier discharge is shown. The expediency and efficiency of using such a switch as an element that, by shunting, the discharge chamber, discharges the barrier to the arrival of the next voltage pulse has been confirmed. It is proved that with the accepted geometrical dimensions of the discharge chamber and the amplitude of the pulse voltage, provided that the magnetic switch is present that it is possible to increase the practical use of electricity by ~ 40% due to that which was accumulated in the dielectric barrier in one discharge. Ref.10, fig. 5.

APA, Harvard, Vancouver, ISO, and other styles

3

Budin, A. V., A. A. Bogomaz, V. A. Kolikov, P. G. Rutberg, and A. F. Savvateev. "Multipulse discharge in the chamber of electric discharge launcher." IEEE Transactions on Magnetics 35, no. 1 (1999): 189–91. http://dx.doi.org/10.1109/20.738401.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Kosenkov, V. "Influence of Vapor-Gas Cavity on Pressure Field in Closed Discharge Chamber with Rigid Walls." Elektronnaya Obrabotka Materialov 57, no. 3 (June 2021): 102–16. http://dx.doi.org/10.52577/eom.2021.57.3.102.

Full text

Abstract:

The pressure field in discharge chambers of a limited volume with deformable walls very often has a great influence on the efficiency of technological processes of deformation of sheet alloys; therefore, its determination is an urgent task. As a result of an electric discharge in the liquid filling the discharge chamber, in it, a cavity with a higher compressibility is formed than the liquid in the chamber. At the stage of the discharge, this cavity is filled with non-ideal plasma, and after the discharge, with liquid vapor and gases dissolved in it (vapor-gas cavity). Its pulsations form a pressure field in the discharge chamber. The moving boundary of the vapor-gas cavity creates great problems in calculating the pressure field in a liquid, especially after a large number of its pulsations. At present, the role of the vapor-gas cavity in the formation of the pressure field in the discharge chamber with a deformable wall, which is a sheet alloy plate, is insufficiently studied. Its definition is the purpose of this work. The study was carried out on the base of a previously developed mathematical model of an electric discharge in water, which in this work is supplemented with relations that significantly increase the accuracy of calculating the resistance of the discharge channel and the energy released in it. It was determined that the pulsations of the vapor-gas cavity provide pressure fluctuations in it in an antiphase with the average pressure in the liquid. In a discharge chamber with rigid walls, they decay slowly, but the presence of a deformable wall leads to a rapid decay of pressure fluctuations. In the previously developed mathematical model, the change in the optical transparency of the plasma was taken into account, and its significant effect on the pressure in the cavity and the pressure field in the liquid was determined.

APA, Harvard, Vancouver, ISO, and other styles

5

Galli, G., H. Hamrita, C. Jammes, M. J. Kirkpatrick, E. Odic, Ph Dessante, Ph Molinie, B. Cantonnet, and J.-C. Nappé. "Characterization and localization of partial-discharge-induced pulses in fission chambers designed for sodium-cooled fast reactors." EPJ Web of Conferences 170 (2018): 03002. http://dx.doi.org/10.1051/epjconf/201817003002.

Full text

Abstract:

During the operation of the Superphenix and Phenix reactors, an aberrant electrical signal was detected from the fission chambers used for neutron flux monitoring. This signal, thought to be due to partial electrical discharge (PD) is similar to the signal resulting from neutron interactions, and is generated in fission chambers at temperatures above 400 °C. This paper reports work on the characterization and localization of the source of this electrical signal in a High Temperature Fission Chamber (HTFC). The relation between the shape of the PD signal and various parameters (nature and pressure of the chamber filling gas, electrode gap distance, and fission chamber geometry) are first described. Next, experiments designed to identify the location within the chambers where the PD are being generated are presented. After verification and refinement of the results of these localization studies, it should be possible to propose changes to the fission chamber in order to reduce or eliminate the PD signal.

APA, Harvard, Vancouver, ISO, and other styles

6

Hiatt, Jeffrey M., and Paul J. Wilbur. "Ring cusp discharge chamber performance optimization." Journal of Propulsion and Power 2, no. 5 (September 1986): 390–97. http://dx.doi.org/10.2514/3.22919.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Bosyakov, M. N., and A. A. Kozlov. "Energy and gas dynamic characteristics of ionization nitrogen installations of industrial type." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 63, no. 3 (November 1, 2018): 342–50. http://dx.doi.org/10.29235/1561-8358-2018-63-3-342-350.

Full text

Abstract:

The work provides the analysis of power characteristics of the industrial equipment – ionic nitriding applications – with different types of vacuum chambers – with hot and cold walls. The calculations results and experimental researches of thermal balance of the system “melt-wall chamber” at the process of plasma nitration for industrial applications are given. The work examines the influence of heat-shielding screens quantity in the applications with cold walls on the internal screen temperature and power of thermal losses at warming up parts melt and at its isothermal endurance. It has been displayed the significant influence of the discharge chamber geometry on the discharge power value which is necessary for the melt warming up and its exposition at the certain temperature – the less are geometrical sizes of the chamber (diameter and height), the smaller is the power of the smoldering discharge which is required for ensuring necessary melt temperature. It is shown that at sufficient melt parts distance from the chamber walls, the voltage drop on the skeleton of the smoldering discharge can be tens volts that causes the decrease of cathodic falling potential and, respectively, the increase of the electric power which is required to maintain necessary melt temperature in comparison to melt which is as close as possible to chamber walls. It leads to the fact that at more dense loading, smaller specific consumption of the electric power to ensure the necessary depth of the nitrated layer is required; at the same time the specific energy consumptions by the melt temperature of 525–530 °C are 0.6–1.6 kW∙h/kg, depending on the loading extent of the chamber. It has been displayed that at ionic nitration, the value of working gas pressure must provide the deviance of the smoldering discharge i. e. the whole area the cathode –melt must be captured by the discharge luminescence.

APA, Harvard, Vancouver, ISO, and other styles

8

Mujic, E., A. Kovacevic, N. Stosic, and I. K. Smith. "The influence of port shape on gas pulsations in a screw compressor discharge chamber." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 222, no. 4 (November 1, 2008): 211–23. http://dx.doi.org/10.1243/09544089jpme205.

Full text

Abstract:

Gas pulsations in suction and discharge chambers are a significant source of noise in screw compressors. This paper shows how such effects in the discharge chamber are influenced both by the compressor operating conditions and its geometric characteristics. An area function is identified for the discharge port as an important parameter influencing the gas pulsations and it is shown how their amplitude can be reduced by optimization of the port shape.

APA, Harvard, Vancouver, ISO, and other styles

9

Kawashima, Kenji, Toshiharu Kagawa, and Toshinori Fujita. "Instantaneous Flow Rate Measurement of Ideal Gases." Journal of Dynamic Systems, Measurement, and Control 122, no. 1 (May 6, 1996): 174–78. http://dx.doi.org/10.1115/1.482439.

Full text

Abstract:

In this paper, a chamber called an “Isothermal Chamber” was developed. The isothermal chamber can almost realize isothermal condition due to larger heat transfer area and heat transfer coefficient by stuffing steel wool in it. Using this chamber, a simple method to measure flow rates of ideal gases was developed. As the process during charge or discharge is almost isothermal, instantaneous flow rates charged into or discharged from the chamber can be obtained measuring only pressure in the chamber. The steady and the unsteady flow rate of air were measured by the proposed method, and the effectiveness of the method was demonstrated. [S0022-0434(00)00301-4]

APA, Harvard, Vancouver, ISO, and other styles

10

Murashov, Iu V., V. Ya Frolov, D. Uhrlandt, S. Gortschakow, D. V. Ivanov, and A. D. Sivaev. "Analysis of Arc Processes in Multi-chamber Arrester for Lightning Protection at High-voltage Overhead Power Lines." PLASMA PHYSICS AND TECHNOLOGY 4, no. 2 (2017): 124–28. http://dx.doi.org/10.14311/ppt.2017.2.124.

Full text

Abstract:

Nowadays multi-chamber arresters are widely distributed as devices of lightning protection of overhead power lines. A mathematical modelling of processes in the discharge chamber of multichamber arrester is necessary to carry out in order to improve its breaking capacity. A three-dimensional mathematical transient model of thermal, gas-dynamic and electromagnetic processes taking place in the discharge chamber of multi-chamber arrester is presented in the article. Basic assumptions, model equations, a computational domain and the boundary conditions are described. Plasma turbulence is taken into account. The results of the calculation i.e. distributions of plasma temperature and overpressure in the discharge chamber at different time points are shown. The analysis of the results was carried out. It is shown that the presence of cavities in the electrodes design promotes electric arc extinction in the discharge chamber of multi-chamber arrester.

APA, Harvard, Vancouver, ISO, and other styles

11

He Wusheng, 贺武生, 孙安邦 Sun Anbang, 毛根旺 Mao Genwang, 霍超 Huo Chao, and 陈茂林 Chen Maolin. "Numerical simulation of ion thruster discharge chamber." High Power Laser and Particle Beams 22, no. 12 (2010): 3020–24. http://dx.doi.org/10.3788/hplpb20102212.3020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Akhatov, M. F., R. R. Kayumov, R. R. Mardanov, I. I. Saifutdinova, and K. I. Khazeev. "Diagram of the plasma torch discharge chamber." Journal of Physics: Conference Series 1870, no. 1 (April 1, 2021): 012024. http://dx.doi.org/10.1088/1742-6596/1870/1/012024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Nishimura, Seigo, Y. Hayashi, Tsuneo Suzuki, Tadachika Nakayama, Hisayuki Suematsu, Wei Hua Jiang, A. Yamazaki, K. Seki, and Koichi Niihara. "Pulsed Wire Discharge Apparatus for Mass Production of Nanosized Powders." Advanced Materials Research 11-12 (February 2006): 315–18. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.315.

Full text

Abstract:

A pulsed wire discharge (PWD) apparatus for mass production of nanosized powders was developed. The apparatus had a wire feeder, and could prepare 1.5 g of Cu powder in 200 sec. The mean surface diameter of Cu powder was 86 nm. The particle size distribution of the powder prepared by 100 discharges was increased than that by one discharge. In addition, the median diameter of the powder after the 100 discharges was larger than that by one discharge. A part of the nanosized powders in production chamber of the apparatus would be grown by the deposition of plasma or vapor formed by the next discharge.

APA, Harvard, Vancouver, ISO, and other styles

14

Hu, Xiao Yang, and Jun Yao. "Research on Dynamic of Wall Loading of the Discharge Chamber under Electro-Hydraulic Breakdown in Liquid." Advanced Materials Research 490-495 (March 2012): 1844–47. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1844.

Full text

Abstract:

The underwater hydraulic discharge chamber is basic tools and method of research for many ocean issues. In this paper analyzed physical process and mechanical state of hydraulic discharge chamber, into account plasma, streamer and cavitation. The results of simulation and calculation compared with empirical data. On based the results analyzed the factors of effect of the underwater state and put forward improvement conditions of structural design for discharge chamber.

APA, Harvard, Vancouver, ISO, and other styles

15

Bereka, V. O., I. V. Bozhko, and I. P. Kondratenko. "RESEARCH OF ENERGY EFFICIENCY OF PROCESSING BY PULSE BARRIER DISCHARGE OF WATER IN A DROP-FILM STATE." Tekhnichna Elektrodynamika 2021, no. 3 (April 19, 2021): 50–57. http://dx.doi.org/10.15407/techned2021.03.050.

Full text

Abstract:

The energy efficiency of a pulsed barrier discharge in air was investigated when it treated a model water sample in a drop-film state containing an organic dye (methylene blue) with an initial concentration of 50 mg/l. The water consumption was 4 l / min, the characteristic droplet diameter was ~1 mm. Water treatment was carried out in a coaxial discharge chamber with a gas gap of 3.2 mm and additionally in an ozonation chamber. The discharge was generated by short ~ 100 ns voltage pulses of ≈26 kV, which provided a current density with an amplitude of ≈1.3 A/cm2 and a pulse energy of ≈ 140 mJ. The time of decomposition of the impurity and the energy efficiency of the discharge were investigated as a function of the pulse repetition rate of 25−300 Hz. The discharge had the highest energy efficiency at frequencies of 25-50 Hz, at which the energy yield corresponding to 50% decomposition of the impurity is about 100 g/kW h. It is shown that most of ozone, one of the main oxidants generated by the discharge, dissolves in water in the discharge chamber. The concentration of ozone at the outlet from the discharge chamber can reach 2.2 mg/l. The remaining ozone is absorbed by the model solution (about 60%) in the ozonization chamber. References 16, figures 7.

APA, Harvard, Vancouver, ISO, and other styles

16

Makhonin, Mykola. "Determination of dependence of voltage of the ozone generator discharge chamber from external factors and design of discharge chamber." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 9(1285) (April 22, 2018): 57–61. http://dx.doi.org/10.20998/2413-4295.2018.09.08.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Kim, Sungjin, Zhuwen Zhou, M. A. Lieberman, and A. J. Lichtenberg. "Relaxation oscillations in a capacitive discharge chamber connected to a peripheral grounded chamber." Journal of Applied Physics 100, no. 10 (November 15, 2006): 103302. http://dx.doi.org/10.1063/1.2384776.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

NIEMANN, C., D. PENACHE, A. TAUSCHWITZ, F. B. ROSMEJ, S. NEFF, R. BIRKNER, C. CONSTANTIN, et al. "Diagnostics of discharge channels for neutralized chamber transport in heavy ion fusion." Laser and Particle Beams 21, no. 1 (January 2003): 13–15. http://dx.doi.org/10.1017/s0263034602211039.

Full text

Abstract:

The final beam transport in the reactor chamber for heavy ion fusion in preformed plasma channels offers many attractive advantages compared to other transport modes. In the past few years, experiments at the Gesellschaft für Schwerionenforschung (GSI) accelerator facility have addressed the creation and investigation of discharge plasmas, designed for the transport of intense ion beams. Stable, self-standing channels of 50 cm length with currents up to 55 kA were initiated in low-pressure ammonia gas by a CO2-laser pulse along the channel axis before the discharge is triggered. The channels were characterized by several plasma diagnostics including interferometry and spectroscopy. We also present first experiments on laser-guided intersecting discharges.

APA, Harvard, Vancouver, ISO, and other styles

19

Guerrato, D., J. M. Nouri, N. Stosic, C. Arcoumanis, and I. K. Smith. "Flow measurements in the discharge port of a screw compressor." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 222, no. 4 (November 1, 2008): 201–10. http://dx.doi.org/10.1243/09544089jpme200.

Full text

Abstract:

The angle-resolved mean velocity and turbulence characteristics of axial air flow within the rotors and discharge chambers of a screw compressor have been measured, using a laser Doppler velocimeter with high spatial and temporal resolution. The measurements were made through special transparent windows fixed in the compressor casing and in the pipe immediately above the discharge port. Results were obtained at a speed of 1000 r/min, a discharge pressure 1 bar, and a temperature of 57 °C. The flow interaction between the rotors and the discharge chamber was established as well as the spatial variation of the axial mean velocity and turbulence velocity fluctuation. It was shown that the discharge flow was complex, strongly time-dependent, and controlled by several mechanisms. In general, the axial velocity, on entering the working chamber downstream of the discharge port exit was higher than that immediately upstream with large variation in mean and root mean square velocities immediately after the opening of the discharge port, then flow becomes more uniform. The high velocity values and large fluctuation are mainly controlled by the pressure gradient across the port at the very beginning of the discharge process, after that, as the port opens wider, uniform flow is influenced mainly by the rotor action. These measurements will be used as input data for more reliable optimization of compressor design and to validate a computational fluid dynamics model of fluid flow within twin screw compressors, already developed in-house.

APA, Harvard, Vancouver, ISO, and other styles

20

Kitayama, I., H. Sakai, Y. Teramoto, S. Chinomi, Y. Inoue, E. Nakano, and T. Takahashi. "Optical observation of discharge in resistive plate chamber." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 424, no. 2-3 (March 1999): 474–82. http://dx.doi.org/10.1016/s0168-9002(98)01379-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Jan, Chyan-Deng, and Quang-Truong Nguyen. "Discharge coefficient for bottom orifice of vortex chamber." Journal of Hydraulic Research 49, no. 3 (June 2011): 388–91. http://dx.doi.org/10.1080/00221686.2011.572442.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Pinchuk, M. E., A. V. Budin, N. K. Kurakina, and A. G. Leks. "Axial Blast Type Discharge Chamber with Moving Electrode." Plasma Physics and Technology Journal 6, no. 3 (November 29, 2019): 227–30. http://dx.doi.org/10.14311/ppt.2019.3.227.

Full text

Abstract:

The paper presents some results concerning electrophysical and gas-dynamics parameters of high-curent arc in axial blast discharge chamber. The experimental stand and numerical model were modified for axial gas flow type. Some design changes are described in the paper. The experiments were carried out for gas pressures of 1.0-6.0 MPa with current amplitude of 25-150 kA. The current half-period was of 1.0-10.0 ms. The contacts moved apart to the distance of 3-4 cm due to gas pressure boost in the chamber. OpenFOAM package with the library swak4foam was used for numerical simulation.

APA, Harvard, Vancouver, ISO, and other styles

23

Macioszczyk, Jan, Monika Lenartowicz, Karol Malecha, and Leszek J. Golonka. "Design and Fabrication of Ceramic Microsystem Utilizing Glow Discharge for Analysis of Liquid Mixtures." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, CICMT (May 1, 2016): 000080–84. http://dx.doi.org/10.4071/2016cicmt-wa11.

Full text

Abstract:

Abstract We present the results of our work on design and fabrication of Low Temperature Co-fired Ceramics (LTCC) Electrolyte as a Cathode Discharge (ELCAD) chip. It consists of plasma chamber filled with working gas (for instance helium). The fluidic channel with sample is placed below the chamber. Discharge ignites between anode and electrolyte cathode through aperture between microfluidic channel and plasma chamber. To avoid filling the chamber with fluid, channel and waste outlet should have proper geometry. We have checked our design and fabricated prototypes in DuPont system. External electrodes have been screen-printed using solderable PdAg paste. Inner electrodes, responsible for plasma creation, were made of platinum. To avoid sagging of structures we have used Sacrificial Volume Materials (SVM) and conducted multistep lamination with modified parameters. Finally, we tested if our device works properly. Firstly, we created discharge using high voltage alternating current source in air and observed discharge. Then, we ran measurements in ECLAD configuration. It was possible to create and sustain discharge with flowing liquid and gas. Also discharge spectra were recorded and analyzed. Zinc and cadmium were detected with limits of 0.14 mg/dm3 and 0.20 mg/dm3, respectively.

APA, Harvard, Vancouver, ISO, and other styles

24

Frolov, V., D. Ivanov, A. Sivaev, and A. Chusov. "Development of a Two-Temperature Mathematical Model of Plasma Processes in a Discharge Chamber of a Multi-chamber Arrester Operating in Conditions of Mountain Areas." PLASMA PHYSICS AND TECHNOLOGY 6, no. 2 (2019): 135–39. http://dx.doi.org/10.14311/ppt.2019.2.135.

Full text

Abstract:

This article is devoted to a development of a mathematical model of plasma processes in a discharge chamber of a multi-chamber arrester operating under reduced pressure. The results obtained using this model will make it possible to develop recommendations on modifying the design of multi-chamber arresters for operation in conditions of mountain areas.<br />A composition, thermodynamic and transport properties of plasma for the two-temperature model were calculated on the basis of the data on the materials of the discharge chamber and on the basis of the experiments performed earlier.<br />The paper presents the results of calculations i.e. distributions of discharge voltage and electrical conductivity on time at various pressures. A comparison of obtained results was carried out.

APA, Harvard, Vancouver, ISO, and other styles

25

Madveika, S., S. Bordusau, A. Zemlyakov, and M. Lushakova. "Investigation of the Method of Dynamic Microwave Power Redistribution in a Resonator-Type Plasmatron." PLASMA PHYSICS AND TECHNOLOGY 6, no. 2 (2019): 107–10. http://dx.doi.org/10.14311/ppt.2019.2.107.

Full text

Abstract:

The investigation results of a dynamic microwave power fmicrowave = 2, 45 ± 0,05 GHz redistribution in a 9000 cm<sup>3</sup> reaction-discharge chamber of a microwave resonator-type plasmatron are presented. In order to redistribute the microwave power, a rotating metallic four-blade L-form dissector placed above the reaction-discharge chamber was used. The microwave power in the local points at the axis of the chamber with plasma and without it was measured applying the "active probe" method. During the experiments the chamber contained silicon plates. Periodical interchange of maximum and minimum microwave power values along the chamber axis was established experimentally. Note, when the dissector was rotating, the range of maximum and minimum "active probe" values dispersion decreased. It has been established that during the dissector rotation the microwave power in the local discharge areas changes with periodic repetition every quarter of revolution.

APA, Harvard, Vancouver, ISO, and other styles

26

Tani, Yoshitaka, Yusuke Yamashita, Ryudo Tsukizaki, Kazutaka Nishiyama, and Hitoshi Kuninaka. "Effect of discharge chamber geometry on ion loss in microwave discharge ion thruster." Acta Astronautica 176 (November 2020): 77–88. http://dx.doi.org/10.1016/j.actaastro.2020.05.062.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Isupov, M. V. "Distributed ferromagnetic enhanced inductive plasma source for plasma processing." Journal of Physics: Conference Series 2119, no. 1 (December 1, 2021): 012115. http://dx.doi.org/10.1088/1742-6596/2119/1/012115.

Full text

Abstract:

Abstract New experimental data on the plasma density profiles have been obtained for a low-frequency (100 kHz) distributed ferromagnetic enhanced inductive plasma source at different locations of inductive discharges. An ability to control the plasma density profiles in a large gas discharge chamber in order to achieve a uniform treatment of a substrate is demonstrated. The differences between the obtained results and literature data for a distributed ferromagnetic enhanced inductive plasma source combined with a radio-frequency inductive discharge are discussed.

APA, Harvard, Vancouver, ISO, and other styles

28

NIGMATZYANOV, Vladislav V., Veniamin A. POGODIN, Lev N. RABINSKIY, Sergey A. SITNIKOV, and Thant ZIN HEIN. "POLYMER PRECURSORS FOR CREATING GAS DISCHARGE CHAMBER FOR ELECTRIC ROCKET ENGINE." Periódico Tchê Química 17, no. 35 (July 20, 2020): 560–68. http://dx.doi.org/10.52571/ptq.v17.n35.2020.47_nigmatzyanov_pgs_560_568.pdf.

Full text

Abstract:

Electric rocket engines are widely used in space technology. Furthermore, at present, electric propulsion engines are also used as mid-flight engines for flights in interplanetary space. On modern spacecraft, the following types of electric propulsion are mostly used: SPT and grid ion thruster. When using these engines as sustainers, it is important is to increase the total power for obtaining the required thrust and specific impulse. With an increase in total power, the volume of the discharge chamber increases, which leads to technological difficulties in the manufacture of discharge chambers from ceramic materials. Thus, the task of finding alternative ceramic materials is relevant and necessary in the development of high-frequency ion thrusters. The article discusses the issues of creating a composite material based on woven quartz materials and organosilicon binder as a precursor filled with silicon nitride for the manufacture of gas discharge chamber (GDC) of high-frequency ion thruster (RFIT). By thermos-gravimetric analysis, a thermosetting binder, which meets the requirements of vibration resistance and electromagnetic permeability of GDC in the megahertz range, was selected. Based on the binder filled with silicon nitride powder, reinforced by quartz woven fabrics, manufactured GDC. The resulting product was tested as part of the laboratory electric propulsion device with a diameter of 100 mm and power of 200W.

APA, Harvard, Vancouver, ISO, and other styles

29

Giannelli, S., A. Kieckhafer, and M. L. R. Walker. "Neutral Gas Expansion in a Cylindrical Helicon Discharge Chamber." Journal of Propulsion and Power 29, no. 3 (May 2013): 540–46. http://dx.doi.org/10.2514/1.b34825.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Facta, Mochammad, Ngurah Ayu Ketut Umiati, and Agung Warsito. "Geometrical Shape Investigation For Electrodes in Silent Discharge Chamber." IOP Conference Series: Materials Science and Engineering 190 (April 2017): 012022. http://dx.doi.org/10.1088/1757-899x/190/1/012022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Хаустова, Алена Николаевна, Андрей Виталиевич Лоян, Олег Петрович Рыбалов, and Евгений Иванович Ищенко. "ПРОФІЛОМЕТРІЮВАННЯ КРОМОК РОЗРЯДНОЇ КАМЕРИ СТАЦІОНАРНОГО ПЛАЗМОВОГО ДВИГУНА." Aerospace technic and technology, no. 8 (December 25, 2018): 91–96. http://dx.doi.org/10.32620/aktt.2018.8.14.

Full text

Abstract:

The effectiveness of stationary plasma thrusters was proved by many years of experience of their on board operation on various spacecraft especially on geostationary orbits. One of the main factors that affects the duration of the SPT operation time is the lifetime of the edges of the discharge chamber walls. One of the factors affecting the discharge chamber lifetime is the erosion of the edges of the insulators. Ceramic wear is cause by the destruction of the high-energy ion flow that takes place in thruster plasma.Theoretical study of the processes of discharge chamber insulators sputtering still does not allow mathematically determining the rate of development of the ceramic edges erosion processes with the necessary accuracy that is required for the SPT lifetime forecast. That is why all the researches require a full-scale testing of the thruster on a long time trial basis with subsequent measurements of the insulators value of erosion.In this paper, several methods for measuring the degree of insulators wear are considered. The analysis of the method for measuring the thickness of the ends of discharge chamber insulators was carried out, followed by the determination of radial erosion. It has been shown that this method is the most suitable for non-separable constructions of SPT due to the high accuracy of the measurements and its simplicity.A method for noncontact profilometry of the edges of thruster discharge chamber insulators was proposed. The use of a non-contact method allows measurements to be carried out, excluding the possibility of any deformations to the surface of insulators. Measurements were provided with the help of modern metallographic microscope. Advantages and disadvantages of the methodology are shown. The analysis of the factors that influences the error during measurements of the ceramic profile is carried out.A method is proposed for contact profilometry of the edges of thruster discharge chamber insulators. Advantages and disadvantages of the methodology are shown. The results of measurements of the profile of the two thrusters with the construction differences are provided.

APA, Harvard, Vancouver, ISO, and other styles

32

Mursenkova, Irina V., Igor E. Ivanov, Yugan Liao, and Igor A. Kryukov. "Experimental and Numerical Investigation of a Surface Sliding Discharge in a Supersonic Flow with an Oblique Shock Wave." Energies 15, no. 6 (March 17, 2022): 2189. http://dx.doi.org/10.3390/en15062189.

Full text

Abstract:

This study presents an experimental and numerical investigation on a surface sliding discharge in a supersonic airflow in the presence of an oblique shock wave. In experiments, flow Mach numbers were 1.20–1.68 in the shock tube combined with the discharge chamber. A single high-voltage 25 kV pulse sustains the plasma; the discharge current has a duration of ~500 ns. A surface sliding discharge is developed as a localized channel in a zone of interaction of an oblique shock wave with a boundary layer on the upper wall of the discharge chamber. The discharge channel acts as a linear source of heat and is at the origin of the induced shock wave. The flow field in the discharge chamber is spatio-temporally surveyed using high-speed shadowgraphy imaging with a frequency of up to 525,000 frames per second. The experiments show that the perturbed flow restored the initial structure after more than 100 μs. Numerical simulation with local energy input into the supersonic flow in a flat channel is carried out on the base of unsteady two-dimensional Navier–Stokes equations. It is determined that the dynamics of an induced shock wave are dependent on the energy input regime and on the flow parameters. The thermal energy release in the discharge channel of 0.22–0.29 J was estimated from a comparison of experimental data and numerical simulations.

APA, Harvard, Vancouver, ISO, and other styles

33

POLYAKOV, D. A., P. A. BATRAKOV, V. A. ZHIGADLO, and K. I. NIKITIN. "SIMULATION OF THE TEMPERATURE FIELD OF THE HEATING SETUP FOR STUDYING THE TEMPERATURE DEPENDENCES OF PARTIAL DISCHARGES CHARACTERISTICS." Actual Issues Of Energy 3, no. 1 (2021): 063–69. http://dx.doi.org/10.25206/2686-6935-2021-3-1-63-69.

Full text

Abstract:

The article describes a study devoted to the development of a heating chamber of the installation for studying the dependences of partial discharge characteristics on temperature. The requirements for the safe operation of the installation have been developed accounting that a cable sample under voltage is placed inside the heating chamber. Geometric models of vertical and horizontal execution of the heating chamber have been built. In the constructed models, the temperature distribution patterns inside the heating chamber are determined. The thermal field on the cable sample surface is the most important value since it significantly affects the characteristics of partial discharges in cable insulation. The obtained results showed that the permissible difference in the cable surface temperature was exceeded. In the subsequent work, measures will be taken to reduce the unevenness of the thermal field by adjusting the heat transfer coefficients or changing the geometry of the installation model.

APA, Harvard, Vancouver, ISO, and other styles

34

Dvinin, S. A., O. A. Sinkevich, Z. A. Kodirzoda, and D. K. Solikhov. "Specificities of Electromagnetic Field Excitation in a Capacitive HF Discharge. III. Symmetric Discharge Partially Filling the Discharge Chamber." Plasma Physics Reports 47, no. 3 (March 2021): 211–34. http://dx.doi.org/10.1134/s1063780x2102001x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Lech, Michał, and Paweł Węgierek. "Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage." Energies 15, no. 3 (February 4, 2022): 1154. http://dx.doi.org/10.3390/en15031154.

Full text

Abstract:

This paper presents the results of testing the electrical strength of an insulating system in a vacuum obtained from three noble gases: argon, neon, helium, and air. The breakdown voltages were measured for contact gaps of 1 mm and 2 mm. A difference was observed in the pressure range where the electrical strength was kept constant. The chamber filled with helium residual gases lost its insulating properties at the highest pressure among the tested gases (2.00 × 100 Pa at contact gap d = 2 mm), while the chamber filled with argon gas lost its insulating properties at the lowest pressure among the tested gases (2.00 × 10−1 Pa at contact gap d = 2 mm). After a decrease in electrical strength, an intense glow discharge was observed. A theoretical description related to the initiation of an electrical breakdown in vacuum insulating systems is also presented. The situation in which the discharge chamber with a contact system was filled with the mentioned gases was analyzed. The mean free paths of the electrons and molecules as well as the velocities and energies of the electrons accelerated by the voltage applied to electrodes were calculated. The obtained results were related to the measurement parameters and analyzed in terms of the discharge development. The results of the research suggest alternatives for the further development of vacuum-extinguishing chambers used in environmentally-friendly electrical switchgear by increasing the rated operating pressure, maintaining the required electrical strength values, and thus facilitating the operation due to greater certainty in regard tomaintaining the integrity of such a vacuum interrupter.

APA, Harvard, Vancouver, ISO, and other styles

36

Jian, Shi, Li Xin, and Wang Shaoping. "Dynamic Pressure Gradient Model of Axial Piston Pump and Parameters Optimization." Mathematical Problems in Engineering 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/352981.

Full text

Abstract:

The unsteady pressure gradient can cause flow noise in prepressure rising of piston pump, and the fluid shock comes up due to the large pressure difference of the piston chamber and discharge port in valve plate. The flow fluctuation control is the optimization objective in previous study, which cannot ensure the steady pressure gradient. Our study is to stabilize the pressure gradient in prepressure rising and control the pressure of piston chamber approaching to the pressure in discharge port after prepressure rising. The models for nonoil shock and dynamic pressure of piston chamber in prepressure rising are established. The parameters of prepressure rising angle, cross angle, wrap angle of V-groove, vertex angle of V-groove, and opening angle of V-groove were optimized, based on which the pressure of the piston chamber approached the pressure in discharge port after prepressure rising, and the pressure gradient is more steady compared to the original parameters. The max pressure gradient decreased by 70.8% and the flow fluctuation declined by 21.4%, which showed the effectivness of optimization.

APA, Harvard, Vancouver, ISO, and other styles

37

Kazub, Valery T., Maria K. Kosheleva, and Stanislav P. Rudobashta. "KINETICS OF GRINDING OF VEGETABLE RAW MATERIALS DURING ELECTRIC DISCHARGE EXTRACTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 6 (May 16, 2021): 76–82. http://dx.doi.org/10.6060/ivkkt.20216406.6385.

Full text

Abstract:

The influence of the degree of grinding of the particles of growing raw materials during electric discharge extraction on the quality of the obtained extracts was studied. Each discharge during electro-discharge extraction contributes to the grinding of a part of the raw material, which is confirmed by granulometric analysis. The particle size of the raw material should be controlled, since excessive grinding of the extracts results in cloudy, difficult to clarify and poorly filtered. The design of the extraction chamber is proposed, in which the grounded electrode is made in the form of a perforated plate, called a false bottom, with the optimal size of the holes and their density, which eliminates the over-grinding of the raw material particles, which leads to the production of turbid and difficult-to-filter extracts. Since the extraction of raw materials is carried out at a certain ratio of solid-liquid phases, the volume of the chamber from the sieve to the bottom does not significantly affect the kinetics of the extraction process itself, since it is intended for collecting the smallest particles of processed raw materials, the mass of which does not exceed 15-16% of the loaded mass of raw materials. The device of the extraction chamber, due to the high turbulence and intensive mixing of the suspension under the action of cavitation and shock waves initiated by the discharge in the liquid, allows you to remove small particles of raw materials less than 1 mm in size from the working area of the chamber. The results of the study show that the extraction of target components from various raw materials using a chamber with a false bottom can significantly reduce the content of the smallest particles of raw materials in the extract. It facilitates the filtration of the extract, reduces the filtration time, significantly reduces the likelihood of turbidity of the solution due to suspension, which improves the quality of the extract. Experimental studies of the developed electric discharge chamber with a false bottom, conducted with various types of plant raw materials, confirm the effectiveness of extraction in the chamber of the proposed design.

APA, Harvard, Vancouver, ISO, and other styles

38

Bing, Shao. "The Strength Model of Small Parameter Scroll Wrap in a Scroll Compressor." Advanced Materials Research 415-417 (December 2011): 80–84. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.80.

Full text

Abstract:

The paper analyzed the pressures and the temperatures in compression chambers for calculation of bending fatigue strength , and a strength model is proposed. For the small parameter scroll wraps, the pressure loads are of π-region pressures which have a normal angle interval of π, the number of acting regions for pressure loads is equal to the number of scroll compression chamber pairs. Apart from the part situated in the center compression chamber, the temperatures of scroll wrap decrease linearly with the normal angle. Selecting the reasonable discharge, specifying the appropriate material and the parameters, and modifying the starting part of scroll wrap are significant methods to improve fatigue strength of scroll wraps in practice.

APA, Harvard, Vancouver, ISO, and other styles

39

Lisovskiy, V., S. Martins, K. Landry, D. Douai, J. P. Booth, V. Cassagne, and V. Yegorenkov. "The effect of discharge chamber geometry on the ignition of low-pressure rf capacitive discharges." Physics of Plasmas 12, no. 9 (September 2005): 093505. http://dx.doi.org/10.1063/1.2033748.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Lisovskiy, Valeriy A., Jean-Paul Booth, Karine Landry, David Douai, Valerick Cassagne, and Vladimir D. Yegorenkov. "The Effect of Discharge Chamber Geometry on the Characteristics of Low-Pressure RF Capacitive Discharges." IEEE Transactions on Plasma Science 35, no. 2 (April 2007): 416–24. http://dx.doi.org/10.1109/tps.2007.893261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Wauters, T., D. Matveev, D. Douai, J. Banks, R. Buckingham, I. S. Carvalho, E. de la Cal, et al. "Isotope removal experiment in JET-ILW in view of T-removal after the 2nd DT campaign at JET." Physica Scripta 97, no. 4 (March 11, 2022): 044001. http://dx.doi.org/10.1088/1402-4896/ac5856.

Full text

Abstract:

Abstract A sequence of fuel recovery methods was tested in JET, equipped with the ITER-like beryllium main chamber wall and tungsten divertor, to reduce the plasma deuterium concentration to less than 1% in preparation for operation with tritium. This was also a key activity with regard to refining the clean-up strategy to be implemented at the end of the 2nd DT campaign in JET (DTE2) and to assess the tools that are envisaged to mitigate the tritium inventory build-up in ITER. The sequence began with 4 days of main chamber baking at 320 °C, followed by a further 4 days in which Ion Cyclotron Wall Conditioning (ICWC) and Glow Discharge Conditioning (GDC) were applied with hydrogen fuelling, still at 320 °C, followed by more ICWC while the vessel cooled gradually from 320 °C to 225 °C on the 4th day. While baking alone is very efficient at recovering fuel from the main chamber, the ICWC and GDC sessions at 320 °C still removed slightly higher amounts of fuel than found previously in isotopic changeover experiments at 200 °C in JET. Finally, GDC and ICWC are found to have similar removal efficiency per unit of discharge energy. The baking week with ICWC and GDC was followed by plasma discharges to remove deposited fuel from the divertor. Raising the inner divertor strike point up to the uppermost accessible point allowed local heating of the surfaces to at least 800 °C for the duration of this discharge configuration (typically 18 s), according to infra-red thermography measurements. In laboratory thermal desorption measurements, maintaining this temperature level for several minutes depletes thick co-deposit samples of fuel. The fuel removal by 14 diverted plasma discharges is analysed, of which 9, for 160 s in total, with raised inner strike point. The initial D content in these discharges started at the low value of 3%–5%, due to the preceding baking and conditioning sequence, and reduced further to 1%, depending on the applied configuration, thus meeting the experimental target.

APA, Harvard, Vancouver, ISO, and other styles

42

Kosenkov, V. M. "Energy conversion in an oscillatory circuit and cylindrical discharge chamber during electric discharge in water." Surface Engineering and Applied Electrochemistry 53, no. 1 (January 2017): 104–10. http://dx.doi.org/10.3103/s1068375517010082.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Danilov, Boris B., and Aleksandr A. Rechkin. "METHOD TO REDUCE COUNTER PRESSURE IN FRONT CHAMBER OF HUMMERS WITH A HYDRAULIC BACK STROKE CHAMBER." Interexpo GEO-Siberia 2 (July 8, 2020): 52–56. http://dx.doi.org/10.33764/2618-981x-2020-2-52-56.

Full text

Abstract:

Using the simulation model, the occurrence of significant counter pressure to striker movement during the power stroke in hummers with a hydraulic back stroke chamber is shown. A device (spring pressure reducing valve) is proposed, which allows decreasing the pressure of resistance to the striker movement. The comparative energy characteristics of a hummer with such a device and machine with standard discharge are obtained, technical parameters of both machines are similar.

APA, Harvard, Vancouver, ISO, and other styles

44

Park, Jeong Ho, Heung Jin Ju, and Kwang Cheol Ko. "Portable Neutron Source Using by Spherically Convergent Beam Fusion Device for Nondestructive Testing." Key Engineering Materials 321-323 (October 2006): 1659–62. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1659.

Full text

Abstract:

This paper presents experimental and simulation results of discharge in spherically convergent beam fusion device. The deuterium-deuterium (D-D) fusion reaction in that device will generate neutron. The experimental device is consists of a vacuum chamber made of stainless steel, spherical mesh type anode and concentric grid cathode of 5cm diameter. The pressure of chamber maintained constant by injecting gas and pulsed voltage applied to grid cathode. A star mode discharge which has possibility of neutron generation was observed.

APA, Harvard, Vancouver, ISO, and other styles

45

Babko, Roman, Tatiana Kuzmina, Zbigniew Suchorab, Marcin K. Widomski, and Małgorzata Franus. "Influence of Treated Sewage Discharge on the Benthos Ciliate Assembly in the Lowland River." Ecological Chemistry and Engineering S 23, no. 3 (September 1, 2016): 461–71. http://dx.doi.org/10.1515/eces-2016-0033.

Full text

Abstract:

AbstractThis paper presents results of the studies of ciliate assemblage in benthos of lowland river influenced by sewage discharged from the municipal wastewater treatment plant. During the presented research the 47 ciliate species, including 45 species from the benthos of the river and 18 from the activated sludge of aeration chamber were identified. Only two species registered in the activated sludge were not observed in the river. Against the background of the lowest number of species in the point located in the distance of 50 m below the discharge of sewage the maximum amount and biomass of these species were observed. Whereas, 200 m below the discharge the decrease in number and biomass of ciliate to the level noted for location before the discharge was observed. Thus, generalizing, one may state that influence of municipal WWTP sewage discharge for ciliate assemblage in the river’s benthos was clearly visible but local.

APA, Harvard, Vancouver, ISO, and other styles

46

Al-geelani, Nasir A., M. Afendi M. Piah, Ibrahim Saeh, Nordiana Azlin Othman, Fatin Liyana Muhamedin, and N. F. Kasri. "Identification of Acoustic Signals of Internal Electric Discharges on Glass Insulator under Variable Applied Voltage." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 2 (April 1, 2016): 827. http://dx.doi.org/10.11591/ijece.v6i2.9530.

Full text

Abstract:

<p>A Partial Discharge (PD) is an unwanted phenomenon in electrical equipment. Therefore it is of great importance to identify different types of PD and assess their severity. This paper investigates the acoustic emissions associated with Internal Discharge (ID) from different types of sources in the time-domain. An experimental setup was arranged in the high voltage laboratory, a chamber with an electrode configuration attached to it was connected to a high voltage transformer for generating various types of PD. A laboratory experiment was done by making the models of these discharges. The test equipment including antennas as a means of detection and digital processing techniques for signal analysis were used. Wavelet signal processing was used to recover the internal discharge acoustic signal by eliminating the noises of many natures.</p>

APA, Harvard, Vancouver, ISO, and other styles

47

Al-geelani, Nasir A., M. Afendi M. Piah, Ibrahim Saeh, Nordiana Azlin Othman, Fatin Liyana Muhamedin, and N. F. Kasri. "Identification of Acoustic Signals of Internal Electric Discharges on Glass Insulator under Variable Applied Voltage." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 2 (April 1, 2016): 827. http://dx.doi.org/10.11591/ijece.v6i2.pp827-834.

Full text

Abstract:

<p>A Partial Discharge (PD) is an unwanted phenomenon in electrical equipment. Therefore it is of great importance to identify different types of PD and assess their severity. This paper investigates the acoustic emissions associated with Internal Discharge (ID) from different types of sources in the time-domain. An experimental setup was arranged in the high voltage laboratory, a chamber with an electrode configuration attached to it was connected to a high voltage transformer for generating various types of PD. A laboratory experiment was done by making the models of these discharges. The test equipment including antennas as a means of detection and digital processing techniques for signal analysis were used. Wavelet signal processing was used to recover the internal discharge acoustic signal by eliminating the noises of many natures.</p>

APA, Harvard, Vancouver, ISO, and other styles

48

Chen Juanjuan, 陈娟娟, 张天平 Zhang Tianping, 贾艳辉 Jia Yanhui, and 李小平 Li Xiaoping. "Performance optimization of 20 cm xenon ion thruster discharge chamber." High Power Laser and Particle Beams 24, no. 10 (2012): 2469–73. http://dx.doi.org/10.3788/hplpb20122410.2469.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Mahalingam, Sudhakar, and James A. Menart. "Particle-Based Plasma Simulations for an Ion Engine Discharge Chamber." Journal of Propulsion and Power 26, no. 4 (July 2010): 673–88. http://dx.doi.org/10.2514/1.45954.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Makhonin, Mykola. "Chemical processes in the discharge chamber of an ozone generator." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 10(1335) (May 31, 2019): 121–25. http://dx.doi.org/10.20998/2413-4295.2019.10.15.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!