| Study for the Gas Flow through a Critical Nozzle |
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| 作者姓名： | Jae-Hyung Kim Heuy-Dong Kim Shigeru Matsuo Toshiaki Setoguchi |
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| 作者单位： | School of Mechanical Engineering，Andong National University，Andong 760-749，Korea，School of Mechanical Engineering，Andong National University，Andong 760-749，Korea，Department of Mechanical Engineering，Saga University，1，Honjo，Saga，840-8502，Japan，Department of Mechanical Engineering，Saga University，1，Honjo，Saga，840-8502，Japan |
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| 摘 要： | In the present study, computational work using the axisymmetric, compressible, Navier-Stokes equations is carried out to predict the discharge coefficient and critical pressure ratio of gas flow through a critical nozzle. The Reynolds number effects are investigated with several nozzles with different throat diameter. Diffuser angle is varied to investigate the effects on the discharge coefficient and critical pressure ratio. The computational results are compared with the previous experimental ones. It is known that the discharge coefficient and critical pressure ratio are given by functions of the Reynolds number and boundary layer integral properties. It is also found that diffuser angle affects the critical pressure ratio.
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| 关 键 词： | 可压缩流体力学 气体流动 边界层 临界压缩比 流量系数 |
| 收稿时间： | 29 April 2004 |
Study for the gas flow through a critical nozzle |
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| Jae-Hyung Kim,Heuy-Dong Kim,Shigeru Matsuo,Toshiaki Setoguchi.Study for the Gas Flow through a Critical Nozzle[J].Journal of Thermal Science,2003,12(3):250-254. |
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| Authors: | Jae-Hyung Kim Heuy-Dong Kim Shigeru Matsuo Toshiaki Setoguchi |
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| Affiliation: | (1) School of Mechanical Engineering, Andong National University, 760-749 Andong, Korea;(2) Department of Mechanical Engineering, Saga University, 1, Honjo, 840-8502 Saga, Japan |
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| Abstract: | In the present study, computational work using the axisymmetric, compressible, Navier-Stokes equations is carried out to predict the discharge coefficient and critical pressure ratio of gas flow through a critical nozzle. The Reynolds number effects are investigated with several nozzles with different throat diameter. Diffuser angle is varied to investigate the effects on the discharge coefficient and critical pressure ratio. The computational results are compared with the previous experimental ones. It is known that the discharge coefficient and critical pressure ratio are given by functions of the Reynolds number and boundary layer integral properties. It is also found that diffuser angle affects the critical pressure ratio. |
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| Keywords: | compressible flow choke boundary layer critical pressure ratio discharge coefficient |
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