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Flow Measurement and Instrumentation, 2020
Abstract Critical-flow Venturi nozzles (CFVNs) are used widely as transfer standards and can measure flow rates accurately. However, previous research has reported that in some CFVNs, the pressure-recovery effect of the diffuser is poor, and it is called the premature unchoking phenomenon.
Naoki Takegawa +2 more
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Abstract Critical-flow Venturi nozzles (CFVNs) are used widely as transfer standards and can measure flow rates accurately. However, previous research has reported that in some CFVNs, the pressure-recovery effect of the diffuser is poor, and it is called the premature unchoking phenomenon.
Naoki Takegawa +2 more
openaire +1 more source
Experimental investigation on ejector performance near critical back pressure
International Journal of Refrigeration, 2017Abstract Critical back pressure plays a crucial role in the performance of ejector systems; however, few systematical investigations have been conducted to study an ejector operating near the critical point. In this paper, the effects of critical back pressure with variations of primary pressure on ejector performance were investigated in an ejector ...
Lei Wang +4 more
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Analysis of The Ejector Critical Back Pressure to A Ejector Refrigeration System
2009 4th IEEE Conference on Industrial Electronics and Applications, 2009In order to enhance the ejector performance, a model for the solar ejection refrigeration system used R134a as refrigerant has been established in this paper. The relationship between the ejector critical back pressure and the system working condition has been discussed.
Fan Xiao-wei, Wei Jing, Zheng hui-fan
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Inversion of the Critical Back Pressure Relation in Isentropic Nozzle Flow
41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2005We consider the one-dimensional isentropic flow equation that relates the nozzle expansion area ratio to the critical back pressure that must not be exceeded in avoidance of a subsonic throat condition. To eliminate guesswork and numerical root solving in deducing the critical back pressure, we apply asymptotic tools to invert this relation ...
Joseph Majdalani, Esam Abu-Irshaid
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The Size Effect on Critical Back Pressure Ratio for Sonic Nozzles
ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 3, 2009As an important parameter, the critical back pressure ratio is directly related with the application of sonic nozzle. When the stagnation condition was fixed, the size effect on critical back pressure ratio was investigated. Some numerical simulations were conducted for sonic nozzles with throat diameter within (0.15–5) mm under laminar flow.
Chunhui Li, Chi Wang
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