As a refrigerant used for a refrigeration cycle, carbon dioxide (CO2) is regarded. In the case that CO2 is used as a refrigerant, a gas-liquid two-phase flow ejector is very important. The gas-liquid two-phase flow ejector consists of a driving flow nozzle, a suction chamber, a mixing section and a diffuser. It is important for optimally designing the driving flow nozzle of the two-phase flow ejector to make clear the acceleration characteristics of the high speed gas-liquid two-phase flow. However, there is only a few study examples to evaluate the acceleration performance reasonably. Therefore, the purpose of this study is to measure the acceleration characteristics and temperature distribution in the CO2 gas-liquid two-phase flow nozzle of the CO2 two-phase flow ejector by experiment. In the experiment, CO2 is blown down through the convergent-divergent nozzle and is discharged into the atmosphere. Visualization of the nozzle flow has been carried out by Particle Image Velocimetry (PIV). Temperature measurement has been carried out by thermocouples. Obtained velocity distribution of gas-liquid two-phase flow nozzle have been considered as the droplets velocity. By the experiment, these velocity distributions in parts of the nozzle and these temperature distributions in the nozzle are obtained. Therefore, the flow acceleration in the nozzle divergent part is clarified by the experimental work.
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ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5732-8
PROCEEDINGS PAPER
PIV Measurement of Carbon Dioxide Gas-Liquid Two-Phase Nozzle Flow
Yoichi Kinoue,
Yoichi Kinoue
Saga University, Honjo, Japan
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Norimasa Shiomi,
Norimasa Shiomi
Saga University, Honjo, Japan
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Toshiaki Setoguchi
Toshiaki Setoguchi
Saga University, Honjo, Japan
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Satoshi Ueno
Saga University, Honjo, Japan
Wakana Tsuru
Saga University, Honjo, Japan
Yoichi Kinoue
Saga University, Honjo, Japan
Norimasa Shiomi
Saga University, Honjo, Japan
Toshiaki Setoguchi
Saga University, Honjo, Japan
Paper No:
AJKFluids2015-20169, V01AT20A002; 7 pages
Published Online:
April 4, 2016
Citation
Ueno, S, Tsuru, W, Kinoue, Y, Shiomi, N, & Setoguchi, T. "PIV Measurement of Carbon Dioxide Gas-Liquid Two-Phase Nozzle Flow." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 1A: Symposia, Part 2. Seoul, South Korea. July 26–31, 2015. V01AT20A002. ASME. https://doi.org/10.1115/AJKFluids2015-20169
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