Study for the Gas Flow through a Critical Nozzle  

作　　者：Jae-Hyung Kim Heuy-Dong Kim Shigeru Matsuo Toshiaki Setoguchi 

机构地区：[1]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

出　　处：《Journal of Thermal Science》2003年第3期250-254,259,共6页热科学学报（英文版）

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.

关 键 词：compressible flow CHOKE boundary layer critical pressure ratio discharge coefficient 

分 类 号：TB126[理学—工程力学]