Journal articles: 'Complete combustion'

1

Erickson, Deborah. "Complete Combustion." Scientific American 264, no. 3 (March 1991): 113. http://dx.doi.org/10.1038/scientificamerican0391-113.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Santilli, Ruggero Maria. "The Novel Hyper-Combustion for the Complete Combustion of Fossil Fuels." International Journal of Chemical Engineering and Applications 10, no. 1 (February 2019): 16–23. http://dx.doi.org/10.18178/ijcea.2019.10.1.733.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Cowell, L. H., R. T. LeCren, and C. E. Tenbrook. "Two-Stage Slagging Combustor Design for a Coal-Fueled Industrial Gas Turbine." Journal of Engineering for Gas Turbines and Power 114, no. 2 (April 1, 1992): 359–66. http://dx.doi.org/10.1115/1.2906599.

Full text

Abstract:

A full-size combustor for a coal-fueled industrial gas turbine engine has been designed and fabricated. The design is based on extensive work completed through one-tenth scale combustion tests. Testing of the combustion hardware will be completed with a high pressure air supply in a combustion test facility before the components are integrated with the gas turbine engine. The combustor is a two-staged, rich-lean design. Fuel and air are introduced in the primary combustion zone where the combustion process is initiated. The primary zone operates in a slagging mode inertially removing coal ash from the gas stream. Four injectors designed for coal water mixture (CWM) atomization are used to introduce the fuel and primary air. In the secondary combustion zone, additional air is injected to complete the combustion process at fuel lean conditions. The secondary zone also serves to reduce the gas temperatures exiting the combustor. Between the primary and secondary zones is a Particulate Rejection Impact Separator (PRIS). In this device much of the coal ash that passes from the primary zone is inertially separated from the gas stream. The two-staged combustor along with the PRIS have been designated as the combustor island. All of the combustor island components are refractory-lined to minimize heat loss. Fabrication of the combustor has been completed. The PRIS is still under construction. The combustor hardware is being installed at the Caterpillar Technical Center for high pressure test evaluation. The design, test installation, and test plan of the full-size combustor island are discussed.

APA, Harvard, Vancouver, ISO, and other styles

4

WANG, Rui, Xionglin LUO, and Feng XU. "Effect of CO Combustion Promoters on Combustion Air Partition in FCC under Nearly Complete Combustion." Chinese Journal of Chemical Engineering 22, no. 5 (May 2014): 531–37. http://dx.doi.org/10.1016/s1004-9541(14)60078-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Nazhipkyzy, Meruyert, Bakytzhan Lesbayev, Gaukhar Smagulova, Ayagoz Bakkara, Zulkhair Mansurov, Nikolay Prikhodko, and Tolganay Temirgaliyeva. "Determination of complete polyethylene waste combustion mode." Chemical Bulletin of Kazakh National University, no. 2 (September 1, 2014): 93–99. http://dx.doi.org/10.15328/chemb_2014_293-99.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Sakiyama, Minoru, and Tetsu Kiyobayashi. "Micro-bomb combustion calorimeter equipped with an electric heater for aiding complete combustion." Journal of Chemical Thermodynamics 32, no. 2 (February 2000): 269–79. http://dx.doi.org/10.1006/jcht.1999.0602.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Zhao, Zhelong, and Xianyu Wu. "Control Oriented Model for Expander Cycle Scramjet." MATEC Web of Conferences 257 (2019): 01004. http://dx.doi.org/10.1051/matecconf/201925701004.

Full text

Abstract:

As a efficient and simple design, expander cycle is widely applied in LRE engineering, but it is seldomly used on scramjet research. In order to establish a complete mathematical model for expander cycle scramjet, a control-oriented model for expander cycle scramjet is proposed in this paper. This model consists of four major parts: combustor, cooling channel, turbo pump and nozzle and gives the result of pressure, temperature, mach number and velocity distribution of combustor and cooling channel and is capable of simulate both pure supersonic combustion mode and supersonic shock wave mode of the combustor. Each part is given by specific mathematical description, which contains the calculation of airflow, combustion, heat transfer and thermal cracking of kerosene. By putting all these parts together, a complete model is formed. This model is proposed to calculate the performance and condition of the engine precisely, comprehensively, swiftly and can be directly used in further study.

APA, Harvard, Vancouver, ISO, and other styles

8

Jeong, Seung-Min, and Jeong-Yeol Choi. "Combined Diagnostic Analysis of Dynamic Combustion Characteristics in a Scramjet Engine." Energies 13, no. 15 (August 4, 2020): 4029. http://dx.doi.org/10.3390/en13154029.

Full text

Abstract:

In this work, the dynamic combustion characteristics in a scramjet engine were investigated using three diagnostic data analysis methods: DMD (Dynamic Mode Decomposition), STFT (Short-Time Fourier Transform), and CEMA (Chemical Explosive Mode Analysis). The data for the analyses were obtained through a 2D numerical experiment using a DDES (Delayed Detached Eddy Simulation) turbulence model, the UCSD (University of California at San Diego) hydrogen/oxygen chemical reaction mechanism, and high-resolution schemes. The STFT was able to detect that oscillations above 50 kHz identified as dominant in FFT results were not the dominant frequencies in a channel-type combustor. In the analysis using DMD, it was confirmed that the critical point that induced a complete change of mixing characteristics existed between an injection pressure of 0.75 MPa and 1.0 MPa. A combined diagnostic analysis that included a CEMA was performed to investigate the dynamic combustion characteristics. The differences in the reaction steps forming the flame structure under each combustor condition were identified, and, through this, it was confirmed that the pressure distribution upstream of the combustor dominated the dynamic combustion characteristics of this scramjet engine. From these processes, it was confirmed that the combined analysis method used in this paper is an effective approach to diagnose the combustion characteristics of a supersonic combustor.

APA, Harvard, Vancouver, ISO, and other styles

9

Ma, Zhi Yi, Fu Lei Zhao, Ya Peng Li, Meng Lv, Le Xue, and Teng Zhang. "Analysis and Calculation of Complete Combustion Level of Biodiesel Compared with Diesel." Advanced Materials Research 512-515 (May 2012): 496–99. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.496.

Full text

Abstract:

Many studies and experiments prove that biodiesel produces less CO, HC and smoke emissions, produces more NOX emission and burns more completely than diesel. Firstly, for evaluating complete combustion level for biodiesel compared with diesel, the paper indicates that heat release ratio can not act independently as the standard; secondly the second maximal heat release ratio and combustion beginning crank angles are combined with Peak heat release ratio; lastly, CAcenter(the corresponding crank angle of centric of instantaneous heat release ratio curve) is introduced and it is the best factor which can accurately reflect the complete combustion level of biodiesel.

APA, Harvard, Vancouver, ISO, and other styles

10

Li, Junhua, Huijing Fu, Lixin Fu, and Jiming Hao. "Complete Combustion of Methane over Indium Tin Oxides Catalysts." Environmental Science & Technology 40, no. 20 (October 2006): 6455–59. http://dx.doi.org/10.1021/es061629q.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Barmina, I., R. Valdmanis, and M. Zaķe. "Control of the Development of Swirling Airflow Dynamics and Its Impact on Biomass Combustion Characteristics." Latvian Journal of Physics and Technical Sciences 54, no. 3 (June 27, 2017): 30–39. http://dx.doi.org/10.1515/lpts-2017-0018.

Full text

Abstract:

AbstractThe development of the swirling flame flow field and gasification/ combustion dynamics at thermo-chemical conversion of biomass pellets has experimentally been studied using a pilot device, which combines a biomass gasifier and combustor by varying the inlet conditions of the fuel-air mixture into the combustor. Experimental modelling of the formation of the cold nonreacting swirling airflow field above the inlet nozzle of the combustor and the upstream flow formation below the inlet nozzle has been carried out to assess the influence of the inlet nozzle diameter, as well primary and secondary air supply rates on the upstream flow formation and air swirl intensity, which is highly responsible for the formation of fuel-air mixture entering the combustor and the development of combustion dynamics downstream of the combustor. The research results demonstrate that at equal primary axial and secondary swirling air supply into the device a decrease in the inlet nozzle diameter enhances the upstream air swirl formation by increasing swirl intensity below the inlet nozzle of the combustor. This leads to the enhanced mixing of the combustible volatiles with the air swirl below the inlet nozzle of the combustor providing a more complete combustion of volatiles and an increase in the heat output of the device.

APA, Harvard, Vancouver, ISO, and other styles

12

Richards, G. A., R. S. Gemmen, and M. J. Yip. "A Test Device for Premixed Gas Turbine Combustion Oscillations." Journal of Engineering for Gas Turbines and Power 119, no. 4 (October 1, 1997): 776–82. http://dx.doi.org/10.1115/1.2817054.

Full text

Abstract:

We report the design and operation of a test device suitable for studying combustion oscillations produced by commercial-scale gas turbine fuel nozzles. Unlike conventional test stands, this test combustor uses a Helmholtz acoustic geometry to replicate the acoustic response that would otherwise be observed only during complete engine testing. We suggest that successful simulation of engine oscillations requires that the flame geometry and resonant frequency of the test device should match the complete engine environment. Instrumentation for measuring both pressure and heat release variation is described. Preliminary tests suggest the importance of characterizing the oscillating behavior in terms of a nozzle reference velocity and inlet air temperature. Initial tests also demonstrate that the stabilizing effect of a pilot flame depends on the operating conditions.

APA, Harvard, Vancouver, ISO, and other styles

13

Борисов, Aleksey Borisov, Колесников, and Gennady Kolesnikov. "The Fire Protection Questions of the Thin Elements of The Roofs from the Aspen and Pine." Safety in Technosphere 5, no. 3 (June 25, 2016): 58–64. http://dx.doi.org/10.12737/18933.

Full text

Abstract:

The experimental research of questions about the influence of wood species on the duration of combustion of the smalldiameter aspen and pine samples was performed. Its surfaces were pre-treated with an aqueous solution of sodium liquid glass with a concentration of from 0% to 20% with step 1%. It is established that processing of samples shingles from aspen wood increases the duration of their complete combustion of from 89 s to 300 s (3.90 times). The same sample treatment shingles from pine wood increases the duration of their complete combustion of from 180 s to 700 s (3.37 times). For fire protection aqueous solution of sodium liquid glass with a concentration of 14% is more relevant. According to the results of the analysis, and in logical connection with known data from other studies, we found that the speed of combustion of samples of aspen than pine. The duration of the complete combustion of samples tested pine shingles without fire protection is 180 s. But the same in form and dimensions of the samples aspen shingles without fire protection only 89 s, this 180/89=2.02 times less. In addition, we have established that the duration of the complete combustion of samples of pine shingles with fire protection 700 s, and aspen shingles with the same fire protection only 300 s, i.e. in 2.33 times less. For explanation of the differences found formulated the hypothesis: per unit mass, the duration of the stage of pyrolysis, and hence combustion is proportional to the amount of extractable substances contained in the wood. The physical adequacy of the initial hypothesis and the reliability of the numerical results were confirmed by consistency with the measurement of the time complete combustion of aspen and pine specimens with fire protection of the surface.

APA, Harvard, Vancouver, ISO, and other styles

14

Sujatha, K., N. Pappa, K. Senthil Kumar, and U. Siddharth Nambi. "Monitoring Power Station Boilers Using ANN and Image Processing." Advanced Materials Research 631-632 (January 2013): 1154–59. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.1154.

Full text

Abstract:

This project deals with the monitoring the combustion quality of the power station boilers using Artificial Intelligence for improvement in the combustion quality in the power station boiler. The colour of the flame indicates whether the combustion taking place is complete, partial or incomplete. When complete combustion takes place the flue gases released are within the permissible limits otherwise its level is high which is out of limit. By analyzing the flame color which is captured using infrared camera and displayed on CCTV the quality of combustion is estimated. If combustion is partial or incomplete the flue gases released will create air pollution. So this work includes enhancement in the quality of combustion, saving of energy as well as check on the pollution level. The features are extracted from the flame images such as average intensity, area, brightness and orientation are obtained after preprocessing. Three classes of images corresponding to different burning conditions are taken from continuous video. Further training, testing and validation with the data collected have been carried out and performance of the various intelligent algorithms is presented.

APA, Harvard, Vancouver, ISO, and other styles

15

KOROTIN, Semyon Y., and Anatoliy I. SHCHELOKOV. "RESEARCH OF MULTI-COMPONENT HEAT CARRIERS AND DEVELOPMENT OF TECHNICAL MEANS OF THEIR RECEIVING." Urban construction and architecture 8, no. 4 (December 15, 2018): 133–36. http://dx.doi.org/10.17673/vestnik.2018.04.22.

Full text

Abstract:

The possibility and expediency of using multicomponent coolants in thermal technological processes, obtained by injection and subsequent evaporation of small water droplets by direct contact with the products of complete combustion of hydrocarbon fuel, is considered. The results of studies of the formation of gas-vapor mixture in the heat generator with the injection of superheated water into the stream of products of complete combustion of gas fuel are given.

APA, Harvard, Vancouver, ISO, and other styles

16

Willis, Joshua J., Alessandro Gallo, Dimosthenis Sokaras, Hassan Aljama, Stanislaw H. Nowak, Emmett D. Goodman, Liheng Wu, et al. "Systematic Structure–Property Relationship Studies in Palladium-Catalyzed Methane Complete Combustion." ACS Catalysis 7, no. 11 (October 20, 2017): 7810–21. http://dx.doi.org/10.1021/acscatal.7b02414.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Jung, Won Young, Young In Song, and Seong-Soo Hong. "Complete Combustion of Benzene over CuO/CeO2Catalysts Prepared by Various Methods." Clean Technology 19, no. 2 (June 28, 2013): 128–33. http://dx.doi.org/10.7464/ksct.2013.19.2.128.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Li, Xiang-Ru, and Fu-Sheng Chen. "Stability of the complete cycle in hydrogen combustion inside the stars." Astrophysics and Space Science 179, no. 2 (1991): 285–92. http://dx.doi.org/10.1007/bf00646948.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Yravedra, Fernando Almagro, and Zuyi Li. "A complete machine learning approach for predicting lithium-ion cell combustion." Electricity Journal 34, no. 1 (January 2021): 106887. http://dx.doi.org/10.1016/j.tej.2020.106887.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Yadav, Sujeet, and Swasti Sundar Mondal. "A complete review based on various aspects of pulverized coal combustion." International Journal of Energy Research 43, no. 8 (February 14, 2019): 3134–65. http://dx.doi.org/10.1002/er.4395.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Chen, Jinghuan, Xueying Zhang, Hamidreza Arandiyan, Yue Peng, Huazhen Chang, and Junhua Li. "Low temperature complete combustion of methane over cobalt chromium oxides catalysts." Catalysis Today 201 (March 2013): 12–18. http://dx.doi.org/10.1016/j.cattod.2012.03.026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Zheng, Yifan, Yan Liu, Huan Zhou, Wanzhen Huang, and Zhiying Pu. "Complete combustion of methane over Co3O4 catalysts: Influence of pH values." Journal of Alloys and Compounds 734 (February 2018): 112–20. http://dx.doi.org/10.1016/j.jallcom.2017.11.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Relangi, Naresh, Antonella Ingenito, and Suppandipillai Jeyakumar. "The Implication of Injection Locations in an Axisymmetric Cavity-Based Scramjet Combustor." Energies 14, no. 9 (May 4, 2021): 2626. http://dx.doi.org/10.3390/en14092626.

Full text

Abstract:

This paper presents the effect of cavity-based injection in an axisymmetric supersonic combustor using numerical investigation. An axisymmetric cavity-based angled and transverse injections in a circular scramjet combustor are studied. A three-dimensional Reynolds-averaged Navier–Stokes (RANS) equation along with the k-ω shear-stress transport (SST) turbulence model and species transport equations are considered for the reacting flow studies. The numerical results of the non-reacting flow studies are validated with the available experimental data and are in good agreement with it. The performance of the injection system is analyzed based on the parameters like wall pressures, combustion efficiency, and total pressure loss of the scramjet combustor. The transverse injection upstream of the cavity and at the bottom wall of the cavity in a supersonic flow field creates a strong shock train in the cavity region that enhances complete combustion of hydrogen-air in the cavity region compared to the cavity fore wall injection schemes. Eventually, the shock train in the flow field enhances the total pressure loss across the combustor. However, a marginal variation in the total pressure loss is observed between the injection schemes.

APA, Harvard, Vancouver, ISO, and other styles

24

Chen, Jun Jie, Qian Wang, Jian Feng Pan, and Zhi Xia He. "Study on Catalytic Combustion Characteristics of Hydrogen inside Micro Scaled Tube." Advanced Materials Research 354-355 (October 2011): 114–18. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.114.

Full text

Abstract:

Catalytic combustion of hydrogen/air mixture inside micro-tube was numerically investigated with detailed gas phase and surface catalytic chemical reaction mechanisms. Combustion characteristics for different reaction models, inlet velocity, tube diameter on surface catalytic combustion reaction, and comparison of numerical and experimental studies were discussed. The Computational results indicate that the surface catalytic combustion restrains the gas phase combustion. The effect of the surface catalytic reaction on the gas phase reaction can be divided to three types. The existence of catalytic wall will help to reach complete reaction in the micro-tube. Some theoretical evidences are provided for the application of catalytic combustion to Micro-electromechanical System (MEMS) and the extension of the combustion limits.

APA, Harvard, Vancouver, ISO, and other styles

25

Harry-Ngei, N., I. Ubong, and E. Ojong. "Emission Rate Estimation of Fuel Oil in A Combustion System Using Empirical Method." European Journal of Engineering Research and Science 4, no. 12 (December 1, 2019): 6–8. http://dx.doi.org/10.24018/ejers.2019.4.12.1574.

Full text

Abstract:

This work highlighted the prediction of the emission rates of the products of combustion using a fuel oil of specific gravity of 0.9. The two reaction pathways of complete combustion and incomplete combustion were used differently to ascertain the emission rates. Ultimate analysis were conducted on the fuel oil to show the percentage composition of elements using ASTM 3178 method for carbon and hydrogen, Kjedahl method for nitrogen, ASTM D1552 for sulphur and the differences used to compute that of oxygen. The estimated percentages of the various elements were the stoichiometrically used to compute the emissions rates at standard conditions. The basis of the computation was a fuel oil flow rate of 10Tonnes/h and the following emission rates were predicted for the complete combustion reaction pathway: 31,246Kg/h for CO2, 65Kg/h for H2O, 158Kg/h for NO2 and 20Kg/h for SO2 while 9,940Kg/h for CO2, 15,623Kg/h for CO, 11,700Kg/h for H2O, 11Kg/h for H2S and 158Kg/h for NO2 were predicted for the incomplete combustion pathway. The study noted that this predictive path should be taken where effective devices or logistics are not in place to measure emissions from combustion systems.

APA, Harvard, Vancouver, ISO, and other styles

26

Andrizal, Rusfandi, and Rivanol Chadry. "Implementasi Metoda Sum Squared Error untuk Identifikasi Kategori Pembakaran Mesin Sepeda Motor 4 Tak Bahan Bakar Bensin." Jurnal Ilmiah Poli Rekayasa 11, no. 2 (April 15, 2016): 1. http://dx.doi.org/10.30630/jipr.11.2.22.

Full text

Abstract:

Motorcycles with injection system uses engine scanner tool as a reference for a mechanic when performing a tune-up to find out and get the engine firing conditions were perfect. Unlike the motorcycle carburetor system, relying only on the experience of a mechanic. If using tools, usually using exhaust emission analyzer which only serves to measure the levels of elements and compounds and exhaust emissions and it can not be used to identify the condition of the combustion engine. Besides, not all the workshops have it, just a certain manufacturer authorized workshops, garages and a large scale or related government agencies that have it. There are two categories of combustion engine, the first engine combustion conditions are not perfect and complete combustion conditions. Perfect engine combustion conditions is needed so that maximum engine performance with an efficient use of fuel. This study aims to make a device that is capable of detecting the condition of combustion 4-stroke motorcycle carburetor system using the method of sum square error (SSE) through the value of the data patterns of exhaust emissions based gas sensors. The study, of the five categories of motorcycles with the manufacturer, type and year of manufacture of different shows that, the system made capable of identifying categories of combustion engine based on the SSE on the identification and reference set. The success rate of identification detection system performs the complete combustion of 89.33% and 97.99% of incomplete combustion.

APA, Harvard, Vancouver, ISO, and other styles

27

Luo, Ai Jun, Jing Chen, Feng He, and Jin Wen. "Research on the Oxygen-Enriched Combustion Technology Used for Ceramic Roller Kiln." Applied Mechanics and Materials 437 (October 2013): 597–601. http://dx.doi.org/10.4028/www.scientific.net/amm.437.597.

Full text

Abstract:

For the presence of high energy consumption and high emission in ceramic production, combining with the energy-saving and emission reduction targets of the National Twelfth Five-Year Plan, the advantages of oxygen-enriched combustion relative to normal combustion are analyzed. Concerning the new scheme of the internal burner distribution and new requirements made by combustion control method, the application of oxygen-enriched combustion technology in ceramic roller kiln is studied. The architecture and internal burner distribution scheme of ceramic roller kiln are improved in this study, and a novel combustion control method for oxygen-enriched combustion is used in the combustion experiment. Experimental results show that, with oxygen-enriched combustion, it can achieve complete combustion of the fuel, the flame characteristics conform the firing process requirements, and reduction of NOx emissions with proper O2 concentration.

APA, Harvard, Vancouver, ISO, and other styles

28

Andrizal, Rivanol Chadry, and Ade Irma Suryani. "Embedded System Using Field Programmable Gate Array (FPGA) myRIO and LabVIEW Programming to Obtain Data Patern Emission of Car Engine Combustion Categories." JOIV : International Journal on Informatics Visualization 2, no. 2 (March 3, 2018): 56. http://dx.doi.org/10.30630/joiv.2.2.50.

Full text

Abstract:

Engine scanner unit is a tool used by mechanical power to know the condition of car engine combustion at the time of tune up process done. The level of elements and compounds that dominant in determining categories of combustion of gasoline fuel car engines through the levels of elements and compounds contained in exhaust emissions are Hydrocarbons (HC), Carbon Monoxide (CO), Carbon Dioxide (CO2) and Oxygen (O2). Complete combustion category produces maximum power, fuel efficiency and emission levels according to the threshold. This occurs when there is a balance of the amount of fuel, airflow and ignition in the engine combustion chamber. Elements and compounds contained in car exhaust emissions can be detected with sensors that are sensitive to elemental levels and these compounds are HC, CO, CO2, and O2 sensors. This study aims to display the data pattern category of combustion engine through exhaust emissions based on multi sensor detection processed with signal processing system in the form of Fast Fourier Transform (FFT) process. Furthermore, data pattern is performed in accordance with the category of combustion engine detected. The system is designed with embedded system using Field Programable Gate Array (FPGA) myRIO and LabVIEW programming. The results in the test displays the data pattern and the comparison test of the reference data pattern with the data pattern of the detection result. The comparison test result of data pattern similar to 87% complete engine combustion category and similar to incomplete combustion category 90%.

APA, Harvard, Vancouver, ISO, and other styles

29

Khan, Tajwali, and Ihtzaz Qamar. "Factors Affecting Characteristic Length of the Combustion Chamber of Liquid Propellant Rocket Engines." July 2019 38, no. 3 (July 1, 2019): 729–44. http://dx.doi.org/10.22581/muet1982.1903.16.

Full text

Abstract:

Optimum characteristic length of the combustion chamber of liquid rocket engine is very important to get higher energy from the liquid propellants. Characteristic length is defined by the time required for complete burning of fuel. Combustion reactions are very fast and combustion is evaporation dependent. This paper proposes fuel droplet evaporation model for liquid propellant rocket engine and discusses the factors which can affect the required size of characteristic length of the combustion chamber based on proposed model. The analysis is performed for low temperature combustion chamber. A computer code based on proposed model is generated, which solve analytical equations to calculate combustion chamber characteristic length under various input conditions. The analysis shows that characteristic length is affected by combustion chamber temperature, pressure, fuel droplet diameter, chamber diameter, mass flow rate of propellants and relative velocity of the droplet in the combustion chamber.

APA, Harvard, Vancouver, ISO, and other styles

30

Cristescu, Tudora, Monica Emanuela Stoica, and Silvian Suditu. "Research on the Carbon Dioxide Emission Factor as a Result of Fuel Combustion." Revista de Chimie 70, no. 2 (March 15, 2019): 585–90. http://dx.doi.org/10.37358/rc.19.2.6961.

Full text

Abstract:

The present paper first discusses a calculation model for the complete combustion of fuels � with the minimum amount of air needed � whose volumetric and mass composition is known. It then describes evaluation models for the heat resulting from fuel combustion, i.e., superior and inferior caloric power value. In this context, the carbon dioxide emission factors for fuel and biofuel combustion, respectively, are evaluated. The results obtained have allowed a comparative analysis regarding carbon dioxide emission.

APA, Harvard, Vancouver, ISO, and other styles

31

Tuccar, Gökhan, Göktürk Memduh Özkan, and Kadir Aydın. "Determınatıon of Atomızatıon Characterıstıcs of a Dıesel Injector." Applied Mechanics and Materials 799-800 (October 2015): 826–30. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.826.

Full text

Abstract:

Atomization of liquid fuels is very important topic for combustion studies since it enhances air/ fuel mixing process and therefore ensures perfect combustion. With today’s common diesel injectors, fuel is directly injected into the combustion chamber with extremely high pressures which exceed 1300 bar in order to obtain perfect atomization. However, these high injection pressures unfortunately create some problems in the injection system such as cavitation erosion which may lead to mechanical failure. Introducing of air into the injector prior to combustion will increase fuel atomization, provide more complete combustion, enhance fuel economy and results in lower engine emissions. The aim of this study is to investigate atomization behaviour of a newly introduced diesel engine which mixes air and fuel prior to combustion chamber.

APA, Harvard, Vancouver, ISO, and other styles

32

Raison, R. J., P. K. Khanna, and P. V. Woods. "Mechanisms of element transfer to the atmosphere during vegetation fires." Canadian Journal of Forest Research 15, no. 1 (February 1, 1985): 132–40. http://dx.doi.org/10.1139/x85-022.

Full text

Abstract:

Published data and newly presented evidence demonstrate that the proportion of N or P lost from plant material during combustion under a wide range of conditions increases linearly with percentage loss of fuel weight during combustion. For N the correlation is strong, and the slope (β) of the regression line approaches unity for combustions under field or simulated-field conditions, but reduces to 0.78 for materials combusted in a muffle furnace. Almost all of the losses of N are due to volatilization. The relationship for P is less well defined, and β is lower (0.56 for field studies; about 0.2 for simulated-field or laboratory combustions). Calcium is not volatilized at the temperatures generated in most vegetation fires, thus increases in the ratio of Ca to other elements during combustion (i.e., higher ratios in burnt residue) indicate nonparticulate transfer of elements to the atmosphere. Increased ratios for Ca to N, P, K, Mg, Mn, and B were demonstrated for several components of eucalypt litter fuels, especially where the degree of combustion was high. The positive relationship between increase in Ca:element ratio and percentage element loss in nonparticulate form during combustion, is of Mitscherlich form so that initial increases in the ratio represent proportionally most element loss. Partitioning of the transfer of elements from the litter and understory to the atmosphere measured during low-intensity fires in three eucalypt forest communities demonstrated a low particulate contribution (and thus a high nonparticulate transfer) for N, K, P, and B. Particulate contributions to elemental transfers are less where combustion is more complete, resulting in formation and transport of fine grey ash which has a high Ca:element ratio. Of particular ecological importance is the significant transfer of P by nonparticulate mechanisms, because such P is likely to be permanently lost from burnt sites and natural rates of P replacement are usually very slow. Fine grey or white ash is highly nutrient enriched (e.g., up to 50-fold for P compared with concentrations in unburnt fuel), and hence its transport from the site in the smoke column, or subsequently by either wind or water, can result in substantial export of nutrients.

APA, Harvard, Vancouver, ISO, and other styles

33

Wang, Hai Rong, Xin Xin Li, and Jian Bo Yan. "Study on Combustion and Emission Performance of Oil Shale Mixed with Coal." Applied Mechanics and Materials 521 (February 2014): 555–62. http://dx.doi.org/10.4028/www.scientific.net/amm.521.555.

Full text

Abstract:

In this paper, Huadian oil shale from Jilin Province of China was selected as the object of study. Firstly, the ignition temperature, complete combustion temperature, maximum mass loss rate, flammability index C and comprehensive combustion characteristic index S during the separate combustion of oil shale was measured , as well as during the combustion of oil shale mixed with coal, by using the thermo-gravimetric analytical method. Then, the impact of blending ratio on the combustion characteristic parameter was discussed, and conducted modeling for the oil shale blending combustion system was established with the steady-state simulation software program Aspen Plus. Finally, we obtained the exhaust gas temperature, volume flow of gases such as CO, CO2 and SO2, as well as their impacts on the operating conditions of the boiler during the mixing combustion under different excess air coefficients.

APA, Harvard, Vancouver, ISO, and other styles

34

Wang, Chen-Bin, Chi-Man Ho, Hung-Kuan Lin, and Hui-Chi Chiu. "Low temperature complete combustion of methane over titania-modified alumina-supported palladium." Fuel 81, no. 14 (September 2002): 1883–87. http://dx.doi.org/10.1016/s0016-2361(02)00125-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Zhou, Wei, Jingkun Jiang, Lei Duan, and Jiming Hao. "Evolution of Submicrometer Organic Aerosols during a Complete Residential Coal Combustion Process." Environmental Science & Technology 50, no. 14 (June 23, 2016): 7861–69. http://dx.doi.org/10.1021/acs.est.6b00075.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Richards, Geo A., Jimmy D. Thornton, Edward H. Robey, and Leonell Arellano. "Open-Loop Active Control of Combustion Dynamics on a Gas Turbine Engine." Journal of Engineering for Gas Turbines and Power 129, no. 1 (March 16, 2006): 38–48. http://dx.doi.org/10.1115/1.2204978.

Full text

Abstract:

Combustion dynamics is a prominent problem in the design and operation of low-emission gas turbine engines. Even modest changes in fuel composition or operating conditions can lead to damaging vibrations in a combustor that was otherwise stable. For this reason, active control has been sought to stabilize combustors that must accommodate fuel variability, new operating conditions, etc. Active control of combustion dynamics has been demonstrated in a number of laboratories, single-nozzle test combustors, and even on a fielded engine. In most of these tests, active control was implemented with closed-loop feedback between the observed pressure signal and the phase and gain of imposed fuel perturbations. In contrast, a number of recent papers have shown that open-loop fuel perturbations can disrupt the feedback between acoustics and heat release that drives the oscillation. Compared to the closed-loop case, this approach has some advantages because it may not require high-fidelity fuel actuators, and could be easier to implement. This paper reports experimental tests of open-loop fuel perturbations to control combustion dynamics in a complete gas turbine engine. Results demonstrate the technique was very successful on the test engine and had minimal effect on pollutant emissions.

APA, Harvard, Vancouver, ISO, and other styles

37

Wang, Lei, Ye Xin Xu, Rui Ming Yuan, Xi Wu, and Xiao Jie Xu. "Analysis of Radiation Performance for a Combustion-End Radiator of a TPV System." Applied Mechanics and Materials 448-453 (October 2013): 1353–58. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1353.

Full text

Abstract:

In this paper, the authors analyzed effects of the factors, such as the air mass flow rate, the geometric dimensioning of the inner and outer combustion tubes and the thickness of the radiator, to the performance of the combustion-end radiator system. The result shows that optimal performance will be achieved when the combustion power is 1kW and the air mass flow rate is 5 times higher than the requirement for the complete combustion of CH4. On this basis, the effect of the geometric dimensioning to the combustion-radiator system is discussed. The performance of the combustion-radiator system is the best when the inner diameter of inner tube is 24mm, the length of the combustion tube is 40mm and the radiator thickness is 1mm. In this condition, the average temperature of the radiant surface, the radiant power density of the radiator and the combustion efficiency are 1530K, 9.41W/cm2 and 47.3%, respectively.

APA, Harvard, Vancouver, ISO, and other styles

38

Beach, D. B., A. J. Rondinone, B. G. Sumpter, S. D. Labinov, and R. K. Richards. "Solid-State Combustion of Metallic Nanoparticles: New Possibilities for an Alternative Energy Carrier." Journal of Energy Resources Technology 129, no. 1 (July 30, 2006): 29–32. http://dx.doi.org/10.1115/1.2424961.

Full text

Abstract:

As an alternative to conventional methods of conveying and delivering energy in mobile applications or to remote locations, we have examined the combustion of nanostructured metal particles assembled into metal clusters. Clusters containing iron nanoparticles (∼50nm in diameter) were found to combust entirely in the solid state due to the high surface-to-volume ratio typical of nanoparticles. Optical temperature measurements indicated that combustion was rapid (∼500ms), and occurred at relatively low peak combustion temperatures (1000-1200K). Combustion produces a mixture of Fe(III) oxides. X-ray diffraction and gravimetric analysis indicated that combustion was nearly complete (93–95% oxidation). Oxide nanoparticles could be readily reduced at temperatures between 673K and 773K using hydrogen at 1atm pressure, and then passivated by the growth of a thin oxide layer. The nanostructuring of the particles is retained throughout the combustion–regeneration cycle. Modeling of the combustion process is in good agreement with observed combustion characteristics.

APA, Harvard, Vancouver, ISO, and other styles

39

Zhang, Jizhou, Fuwu Yan, and Yu Wang. "Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine." E3S Web of Conferences 268 (2021): 01026. http://dx.doi.org/10.1051/e3sconf/202126801026.

Full text

Abstract:

For a certain type of direct injection diesel engine, a three-dimensional model of a single-cylinder complete combustion chamber and in-take/exhaust port was established. Three-dimensional Computational Fluid Dynamics (CFD) analysis software CONVERGE was used for simulation. The effects of fuel injection strategy and combustion chamber geometry on combustion emissions of diesel engine were studied while the combustion chamber volume, engine compression ratio, total fuel injection quantity and total injection duration were kept unchanged. The results show that the strategy of multiple injection and reasonable shape of combustion chamber can effectively increase the turbulent kinetic energy in cylinder, improve the uniformity of oil-gas mixing, reduce the emission of pollutants, and increase the quality of after injection can further reduce the emissions of NOx and soot.

APA, Harvard, Vancouver, ISO, and other styles

40

Sokolov, V. Y., S. A. Naumov, A. V. Sadchikov, and S. V. Mitrofanov. "Use of Ceramic Injection Molding Technology to Increase Biogas Burners Efficiency." Key Engineering Materials 736 (June 2017): 127–31. http://dx.doi.org/10.4028/www.scientific.net/kem.736.127.

Full text

Abstract:

The article gives considerations to issues relating to organization of biogas combustion process. A new design of biogas burner is suggested. It differs from existing analogues by more complete combustion of air and gas mixture and high efficiency. Feasibility of greater burners' effectiveness due to the use of ceramic injection molding technology is demonstrated here.

APA, Harvard, Vancouver, ISO, and other styles

41

Matsuo, Kenji, Naoyoshi Nunotani, and Nobuhito Imanaka. "Catalytic toluene combustion over Pt loaded on lanthanum silicate with apatite-type structure." Functional Materials Letters 12, no. 05 (September 17, 2019): 1950074. http://dx.doi.org/10.1142/s1793604719500747.

Full text

Abstract:

Novel Pt/La[Formula: see text]Si5CoO[Formula: see text]-Al2O3 catalysts were developed for complete toluene combustion, and their catalytic activities were investigated. The introduction of the La[Formula: see text]Si5CoO[Formula: see text] promoter enhanced the reducibility and the catalytic activity due to its oxygen release ability. Among the samples prepared in this study, the 10[Formula: see text]wt.% Pt/10[Formula: see text]wt.% La[Formula: see text]Si5CoO[Formula: see text]-Al2O3 catalyst showed the highest catalytic activity, allowing the complete toluene combustion at 120∘C. In addition, the catalyst possesses high water durability.

APA, Harvard, Vancouver, ISO, and other styles

42

Konrad, W., N. Brehm, F. Kameier, C. Freeman, and I. J. Day. "Combustion Instability Investigations on the BR710 Jet Engine." Journal of Engineering for Gas Turbines and Power 120, no. 1 (January 1, 1998): 34–40. http://dx.doi.org/10.1115/1.2818085.

Full text

Abstract:

During the development of the BR710 jet engine, audible combustor instabilities (termed “rumble”) occurred. Amplitudes measured with test cell microphones were up to 130 dB at around 100 Hz. Disturbances of this amplitude are clearly undesirable, even if only present during start-up, and a research program was initiated to eliminate the problem. Presented here is the methodical and structured approach used to identify, understand, and remove the instability. Some reference is made to theory, which was used for guidance, but the focus of the work is on the research done to find the cause of the problem and to correct it. The investigation followed two separate, but parallel, paths—one looking in detail at individual components of the engine to identify possible involvement in the instability and the other looking at the pressure signals from various parts of a complete engine to help pinpoint the source of the disturbance. The main cause of the BR710 combustor rumble was found to be a self-excited aerodynamic instability arising from the design of the fuel injector head. In the end, minor modifications lead to spray pattern changes, which greatly reduced the combustor noise. As a result of this work, new recommendations are made for reducing the risk of combustion instabilities in jet engines.

APA, Harvard, Vancouver, ISO, and other styles

43

Gulyurtlu, I., M. Helena Lopes, P. Abelha, I. Cabrita, and J. F. Santos Oliveira. "The Study of Partitioning of Heavy Metals During Fluidized Bed Combustion of Sewage Sludge and Coal." Journal of Energy Resources Technology 128, no. 2 (June 3, 2005): 104–10. http://dx.doi.org/10.1115/1.2126988.

Full text

Abstract:

The behavior of Cd, Cr, Cu, Co, Mn, Ni, Pb, Zn, and Hg during the combustion tests of a dry granular sewage sludge on a fluidized bed combustor pilot (FBC) of about 0.3 MW was evaluated. The emissions of these heavy metals from mono-combustion were compared with those of co-combustion of the sludge with a bituminous coal. The effect of the addition of limestone was also studied in order to retain sulphur compounds and to verify its influence on the retention of heavy metals (HM). Heavy metals were collected and analyzed from different locations of the installation, which included the stack, the two cyclones, and the material removed from the bed. The results showed that the volatility of metals was rather low, resulting in emissions below the legal limits of the new directive on incineration, with the exception of Hg during the mono-combustion tests. The partitioning of metals, except for Hg, appeared to follow that of ashes, amounting to levels above 90% in the bed streams in the mono-combustion case. For co-combustion, there was a lower fixation of HM in the bed ashes, mostly originating essentially from the sewage sludge, ranging between 40% and 80%. It is believed that in this latter case, a slightly higher temperature could have enhanced the volatilization, especially of Cd and Pb. However these metals were then retained in fly ashes captured in the cyclones. In the case of Hg, the volatilisation was complete. The bed ashes were free of Hg and part of Hg was retained in the cyclones and the rest was emitted either with fine ash particles or in gaseous forms. In mono-combustion the Hg emissions from the stack (particles and gas) accounted for about 50%, although there was a significant amount unaccounted for. This appeared to have significantly decreased in the case of co-combustion, as only about 15% has been emitted, due to the retention effect of cyclone ashes which presented high quantities of unburned matter, calcium and sulphur.

APA, Harvard, Vancouver, ISO, and other styles

44

Markov, A. A., M. A. Hobosyan, and K. S. Martirosyan. "Slip-Jump Model for Carbon Combustion Synthesis of Complex Oxide Nanoparticles." Eurasian Chemico-Technological Journal 18, no. 3 (November 5, 2016): 223. http://dx.doi.org/10.18321/ectj428.

Full text

Abstract:

Carbon Combustion Synthesis of Oxides (CCSO) is a promising method to produce submicron- and nano- sized complex oxides. The CCSO was successfully utilized for producing several complex oxides, a complete theoretical model including the sample porosity, flow parameters and reaction energetics is needed to predict the combustion parameters for CCSO. In this work, we studied the ignition temperature and combustion wave axial temperature distribution, activation energy, combustion heat and thermal losses for a typical CCSO synthesis for cylindrical samples of Ni-Zn ferrites with high (>85%) porosity. We developed a two level combustion model of chemically active nano-dispersed mixture, using the experimentally measured ignition temperature and combustion parameter values utilizing the slipjump method for high Knudsen numbers. The theoretical predictions of highly porous samples when the fl ow resistivity is small and the gas can easily fl ow through the cylindrical sample are in good agreement with the experimental data. The calculation of combustion characteristics for the lower porosity values demonstrated that the surface combustion was dominated due to high gas fl ow resistivity of the sample. Finger combustion features were observed at this combustion mode.

APA, Harvard, Vancouver, ISO, and other styles

45

Lieuwen, Tim, and Keith McManus. "That Elusive Hum." Mechanical Engineering 124, no. 06 (June 1, 2002): 53–55. http://dx.doi.org/10.1115/1.2002-jun-4.

Full text

Abstract:

This article highlights about modern power turbines that have the highest operating efficiencies. These turbines turn out the fewest pollutants among major combustion energy converting devices. In addition, they are attractive because of low capital costs required to bring new systems online. As a result, gas turbines have become the dominant technology for new power generating capacity in the United States and worldwide. Experimentalists have developed new diagnostic tools for making pertinent measurements in the unsteady, harsh combustor environment. In addition, computational advances in simulating these unsteady flows are providing a more complete picture of the relationships among the myriad of unsteady flow processes and flame propagation. The accuracy of simplified, physics-based models that can be used for design-level decisions is improving. Combustion dynamics remains a challenging problem, but the large efforts at university, industry, and government labs advance our understanding and bring us closer to dealing with the problem.

APA, Harvard, Vancouver, ISO, and other styles

46

Yin, Shui E., and Jun Wu. "Numerical Simulation of Combustion Process in a 350t/d MSW Incinerator." Applied Mechanics and Materials 268-270 (December 2012): 898–901. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.898.

Full text

Abstract:

A mathematical model was presented for the combustion of municipal solid waste in a 350t/d MSW-burning incinerator. Numerical simulations were performed to predict the temperature and the species distributions in the furnace, with practical operational conditions taken into account. When the total air supply is constant, reducing primary air and increasing secondary air properly results in the higher total temperature of the furnace and the more oxygen concentration at the furnace outlet, and thereby contributes to the complete combustion of combustibles so that an optimal combustion effect can be achieved.

APA, Harvard, Vancouver, ISO, and other styles

47

Lv, Hui Ping, Gong Pei Pan, Xin Chen, Hou He Chen, Chen Guang Zhu, and Guo Sheng Liu. "Experimental Study on the Thermodynamic Properties of Thermites." Advanced Materials Research 550-553 (July 2012): 2777–81. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2777.

Full text

Abstract:

In order to study the thermites systematically, six different thermites were chosen and prepared, then the thermodynamic properties were measured. It was found that Mg+MnO2, Al+Fe3O4 and Mg+CuO combusted steadily and slowly, while Mg+MnO2 had a high combustion temperature; Mg+CuO, Mg+Fe3O4 and Mg+MnO2 had lower starting reaction temperature, higher releasing heat, and reacted easily; Mg+MnO2, Mg+CuO and Al+CuO had higher combustion heat and complete combustion capacity. Mg+MnO2 and Mg+CuO are two ideal thermites, have bright practical application prospect.

APA, Harvard, Vancouver, ISO, and other styles

48

Shtykov, Roman. "SIMULATION OF THE GAS MIXING PROCESS OF THE FUEL SUPPLY SYSTEM." Modeling of systems and processes 13, no. 1 (May 26, 2020): 87–93. http://dx.doi.org/10.12737/2219-0767-2020-13-1-87-93.

Full text

Abstract:

The article discusses the methods of modeling gas mixing, leading to more intense gas mixing, for the most complete combustion of the resulting turbulent jet, which is used in combustion processes. The necessity of the proposed model is proved: by summing the concentrations of the components in the zones of fuel and oxidizer; stoichiometric flow of combustible gases and oxygen (air) to the flame front, resulting from the dynamic compatibility of indicators at a weak gap; comparison of numerical results with experimental and theoretical data on the combustion of a mixture in air.

APA, Harvard, Vancouver, ISO, and other styles

49

Butt, M. Usman. "Converting an automobile turbocharger into a micro gas turbine." E3S Web of Conferences 95 (2019): 02008. http://dx.doi.org/10.1051/e3sconf/20199502008.

Full text

Abstract:

A low cost micro turbojet made by using an automobile turbocharger and other automobile components for research is presented in this paper. The machine comprises mainly of three main assemblies, the compressor & turbine assembly, the combustion chamber and the lubrication & cooling accessories. Carefully selected turbocharger with correct compressor & turbine combination by taking into account their efficiencies and losses associated with their small size and suitably designed combustion chamber results in a self-sustaining turbojet. The combustion chamber is composed of a combustion liner/flame tube and an outer cylinder. The flame tube is divided into three different zones to allow complete combustion and cooling of hot gases. The fuel used is liquid petroleum gas (LPG). The maximum pressure recorded in the combustion chamber was 11.5 psi and a pressure loss of about 4%. The maximum rpm (revolutions per minute) of the engine ranged to 84000.

APA, Harvard, Vancouver, ISO, and other styles

50

Tao, Yi. "Investigation on the Combustion and Emission Characteristics of Light-Vehicle Diesel Engine Fueled with Bio-Diesel." Advanced Materials Research 268-270 (July 2011): 1313–16. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.1313.

Full text

Abstract:

Tests were performed with a light-vehicle diesel engine. Four representative operating conditions in 1600r/min speed have been considered. This article compares the combustion and emission characteristics of engine fueled with Bio-diesel and standard diesel. The results showed that the ignition delay time and combustion duration shorten when fuel with bio-diesel. Bio-diesel contains more oxygen and that contribute to complete combustion of fuel. The combustion of bio-diesel fuel results higher NOx emission and lower HC、CO emissions at all operating conditions. But lower Soot emission because of bio-diesel dose not contains sulfides. At the same time, fuel consumption higher, because calorific value of bio-diesel is lower than standard diesel.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Complete combustion'

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