Dynamic behaviors of cavitation bubble for the steady cavitating flow  

作　　者：Jun CAI,Xiulan HUAI and Xunfeng LIInstitute of Engineering Thermophysics,Chinese Academy of Sciences,P.O.Box 2706,Beijing 100190,China Professor 

出　　处：《Journal of Thermal Science》2009年第4期338-344,共7页热科学学报（英文版）

基　　金：support of the National Natural Science Foundation of China (Grant No. 50806078);the National High-Tech Research and Development Program of China (863 Program, Grant No. 2006AA05Z203).

摘　　要：In this paper, by introducing the flow velocity item into the classical Rayleigh-Plesset dynamic equation, a newequation, which does not involve the time term and can describe the motion of cavitation bubble in the steadycavitating flow, has been obtained. By solving the new motion equation using Runge-Kutta fourth order methodwith adaptive step size control, the dynamic behaviors of cavitation bubble driven by the varying pressure fielddownstream of a venturi cavitation reactor are numerically simulated. The effects of liquid temperature (correspondingto the saturated vapor pressure of liquid), cavitation number and inlet pressure of venturi on radial motionof bubble and pressure pulse due to the radial motion are analyzed and discussed in detail. Some dynamicbehaviors of bubble different from those in previous papers are displayed. In addition, the internal relationshipbetween bubble dynamics and process intensification is also discussed. The simulation results reported in thiswork reveal the variation laws of cavitation intensity with the flow conditions of liquid, and will lay a foundationfor the practical application of hydrodynamic cavitation technology.

关 键 词：cavitation bubble bubble dynamics hydrodynamic cavitation cavitating flow process intensification 

分 类 号：O427.4[理学—声学]