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Relevant bibliographies by topics / Unstable charge pump

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Journal articles

Academic literature on the topic 'Unstable charge pump'

Author: Grafiati

Published: 19 July 2023

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Journal articles on the topic "Unstable charge pump"

1

Kumar, Amit, Ruby Gupta, and Jyotsna Sharma. "Effect of dust grains on the parametric coupling of a lower hybrid wave driven ion cyclotron wave in a tokamak plasma." AIP Advances 12, no. 3 (2022): 035026. http://dx.doi.org/10.1063/5.0085062.

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In this article, the effect of dust charge fluctuations on the parametric upconversion of a lower hybrid wave into an ion cyclotron wave and a side band wave in a two-ion species tokamak plasma is studied. When the oscillatory velocity of plasma electrons is a few percent of the sound velocity, the lower hybrid wave becomes unstable and decays into two modes: an ion cyclotron wave mode and a low frequency lower hybrid side band wave. Furthermore, a ponderomotive force by a lower hybrid pump and a side band wave is exerted on the existing electrons, which drives the ion cyclotron decay mode. Th

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2

Gray, Megan M., Anita A. Thomas, Brian Burns, and Rachel A. Umoren. "Identifying Crucial Equipment and Skills Needed to Evacuate Critically Ill Infants During Disasters: Using Nursing Expertise to Guide Training Targets." Prehospital and Disaster Medicine 34, no. 04 (2019): 370–75. http://dx.doi.org/10.1017/s1049023x19004473.

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AbstractIntroduction:Unexpected disasters, such as earthquakes or fires, require preparation to address knowledge gaps that may negatively affect vulnerable patients. Training programs can promote natural disaster readiness to respond and evacuate patients safely, but also require evidence-based information to guide learning objectives.Problem:There is limited evidence on what skills and bedside equipment are most important to include in disaster training and evacuation programs for critically ill infants.Methods:An expert panel was used to create a 13-item mastery checklist of skills for beds

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3

Luo, Can, Hao Liu, Li Cheng, Chuan Wang, Weixuan Jiao, and Di Zhang. "Unsteady Flow Process in Mixed Waterjet Propulsion Pumps with Nozzle Based on Computational Fluid Dynamics." Processes 7, no. 12 (2019): 910. http://dx.doi.org/10.3390/pr7120910.

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The unsteady flow process of waterjet pumps is related to the comprehensive performance and phenomenon of rotating stall and cavitation. To analyze the unsteady flow process on the unsteady condition, a computational domain containing nozzle, impeller, outlet guide vane (OGV), and shaft is established. The surface vortex of the blade is unstable at the valley point of the hydraulic unstable zone. The vortex core and morphological characteristics of the vortex will change in a small range with time. The flow of the best efficiency point and the start point of the hydraulic unstable zone on each

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4

Han, Feng, Xionghuan Chen, Yang Yang, and Chuan Wang. "Numerical and Experimental Study on the Effect of Rotor–Stator Distance on Rotor–Stator Interaction Strength within Mixed-Flow Centrifugal Pumps." Journal of Marine Science and Engineering 10, no. 8 (2022): 1114. http://dx.doi.org/10.3390/jmse10081114.

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In this article, the influence of rotor–stator distance on the pump performance and rotor–stator interaction strength within mixed-flow centrifugal pump was investigated based on numerical calculation and test verification. Firstly, the performances of mixed-flow centrifugal pumps with two different rotor–stator distances were obtained and compared with the numerical results, which confirms the high accuracy of the numerical simulation. Next, the performances of mixed-flow centrifugal pumps with five different rotor–stator distances were compared and analyzed. It was found that the hydraulic p

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5

Itkin, G. P., A. A. Drobyshev, O. Yu Dmitrieva, A. S. Buchnev, and A. A. Sysoev. "TESTING THE INTERACTION OF HEART LEFT VENTRICLE AND CONTINUOUS-FLOW PUMP ON A MOCK CIRCULATION MODEL UNDER NORMAL AND PATHOLOGICAL CONDITIONS." Russian Journal of Transplantology and Artificial Organs 17, no. 3 (2015): 43–49. http://dx.doi.org/10.15825/1995-1191-2015-3-43-49.

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Introduction. The preliminary study of new developed pumps for circulatory support on the hydrodynamic circulation model is an important step in the process of their designing. Hydrodynamic circulation models that can closely imitate cardio – vascular system are important to defi ne the range of effective functioning of the pumps under normal and heart disease conditions which is of great importance for defi ning the mode of these pumps in real clinical conditions.The aim of study is to create a new hydrodynamic circulation model of the systemic circulation to study the processes of interactio

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6

Zhu, Chuanhui, Shubin Yan, Xiaodong Dong, Wei Zhang, Biyi Huang, and Yang Cui. "Exergy Analysis of Phase-Change Heat-Storage Coupled Solar Heat Pump Heating System." Materials 14, no. 19 (2021): 5552. http://dx.doi.org/10.3390/ma14195552.

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With the rapid development of industrialization, the excessive use of fossil fuels has caused problems such as increased greenhouse gas emissions and energy shortages. The development and use of renewable energy has attracted increased attention. In recent years, solar heat pump heating technology that uses clean solar energy combined with high-efficiency heat pump units is the development direction of clean heating in winter in northern regions. However, the use of solar energy is intermittent and unstable. The low-valley electricity policy is a night-time electricity price policy. Heat pump

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7

Sakai, Kento, Bungo Iwase, Keisuke Matsumoto, Kazuyoshi Miyagawa, and Satoshi Kawasaki. "Investigation on axial thrust behavior of balance piston system for a rocket pump." Journal of Physics: Conference Series 2217, no. 1 (2022): 012029. http://dx.doi.org/10.1088/1742-6596/2217/1/012029.

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Abstract High stability in axial direction is required for rocket pumps operated under extremely low-temperature and high-pressure conditions, turbopumps therefore uses balance piston (BP) system for balancing their axial thrust. The BP system is stable under quasi-static conditions. However, BP system might become dynamically unstable under some condition. Thus it is fundamental for stability evaluation of turbopumps to predict static/dynamic characteristics in axial direction of BP system. Furthermore, we focus on characteristic change by cavitation which often occurs in the pump inlet. In t

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8

Yang, Yongfei, Wei Li, Weidong Shi, Yuanfeng Ping, Yang Yang, and Lei Wang. "Numerical investigation on the unstable flow at off-design condition in a mixed-flow pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 7 (2019): 849–65. http://dx.doi.org/10.1177/0957650919833892.

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The mixed-flow pump is wildly used in industrial and agricultural fields, and the requirements for its stability become more and more restricted with the improvement of the capacities. When the pump is operated under part-loading conditions, unstable characteristic like rotating stall happens and brings intensive vibration and noise. To reveal the internal unstable flow characteristics in mixed-flow pump, unsteady numerical simulation is conducted under different flow rates in the current research. The secondary flow and the vortex induced by the unsteady flow in the pump, which vary with the

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9

Yang, Mengqi, Xingxing Huang, Qilian He, et al. "Fluid-Structure Coupling Analysis of a Pump-turbine unit during the Pump Shutdown Transient Process." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012038. http://dx.doi.org/10.1088/1755-1315/1079/1/012038.

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Abstract Hydropower is a major renewable clean energy and is widely used worldwide. The reversible pump-turbine unit of the pumped-storage power station is able to work in two main operating modes as required by the power grid: turbine-mode for power generation and pump-mode for power storage. In order to absorb unstable energies such as wind and solar energy and improve the quality of the electricity, reversible pump-turbines need to frequently change operating conditions, and experience more start-stops under different operating modes in a short period. The unstable flow during these transie

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10

Nejneru, Carmen, Diana-Petronela Burduhos-Nergis, Mihai Axinte, Manuela Cristina Perju, and Costica Bejinariu. "Corrosion Behaviour of Nodular Cast Iron Used for Rotor Manufacturing in Different Wastewaters." Coatings 12, no. 7 (2022): 911. http://dx.doi.org/10.3390/coatings12070911.

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Submersible drainage sump pumps work in a highly corrosive environment, forming films with corrosive reaction products on the surface. Pump rotors are high-demand parts, so they are made of quality materials with good wear and corrosion resistance properties such as nodular graphite cast iron. This paper analyses the corrosion behaviour of cast iron used in the manufacture of rotors in three types of wastewaters, with variable pH. Nodular graphite cast iron samples were immersed in wastewater for 30, 60, and 90 days and tested by linear polarisation and electrochemical impedance spectroscopy (

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