叶片空化清洗器单空泡动力学研究

Study on Single Bubble Dynamics of Blade Cavitating Cleaner

基于叶片空化清洗器流场模型,对叶片空化清洗器流场进行面积等效处理,利用MATLAB对流场面积进行参数化编程。以Rayleigh-Plesset方程为基础,应用4-5阶Runge-Kutta法对推导的等效流场的单空泡动力学模型进行数值求解,得到了叶片清洗器单空泡生长、溃灭的流场特性变化规律。结果表明:面积等效方式为复杂流场中单空泡流场特性的分析提供一种手段;空泡溃灭位置位于流场入口x/x_0=0.155处,溃灭时产生高温、高压和高速微射流,可有效去除管道垢质。

The flow field model of the blade cavitation cleaner was analyzed according to the area equivalent method. The parametrization program was compiled on MATLAB software platform. Based on the Rayleigh-Plesset equation, the single bubble dynamic model of the equivalent flow field was solved numerically with the 4-5 order Runge-Kutta method. The change law of flow field character during the single bubble growth and collapse was gotten. The results show that the area equivalent method provides a means for the analysis of the characteristics of single bubble flow field in complex flow field. The bubble collapse occurs near the inlet of the flow field at x/x0=0.155, which produces extreme heat, high pressure and high speed micro jet when the bubble collapse. The blade cavitation cleaner can effectively remove pipe fouling.