ABSTRACT
Xinping[2-3] Long et al observed that the cavitation flow became a bubble flow mixing and collapsed in the throat exports or diffusion tube by researching on cavitation flow of jet pump under extreme conditions, At this time, The outlet pressure has no effect on export flow of jetpump. Besides, Qingshanyili et al[8-11] in Japan have achieved some results by doing some research on choking phenomenon. Now, The research on choking phenomenon is studied by the experimental methods. The pressure, velocity and the void fraction distribution of the choke pipe are difficult to be measured when the choking cavitation phenomenon appears, Because of the limit of test methods, So, Numerical simulation is a research method by using CFD software.
