固液两相流体中空蚀机理研究的新方法

项目名称： 固液两相流体中空蚀机理研究的新方法

项目编号： No.51209210

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 水利科学与海洋工程学科

项目作者： 马治国

作者单位： 中国人民解放军海军工程大学

项目金额： 25万元

中文摘要： 针对固液两相流体中的近壁面附近空蚀机理问题，通过对多相、瞬态、微观和随机的复杂空蚀物理过程分析，并结合固液两相流体中激光空化气泡的可控产生以及高速摄影、水听器测量等技术，构成固液两相流体中空泡空蚀机理及靶材空蚀强度定量测量的总体研究框架。 课题将建立固液两相流体中空泡与壁面相互作用、空泡溃灭冲击压力等理论模型，设计并制作高功率激光空化及测量系统。对不同固体沙粒特性、不同壁面材料类型、空泡特性、水流特性下对应的空泡溃灭冲击波、空泡溃灭射流及靶材空蚀量的实验数据分析，获得壁面靶材附近下空泡空蚀特性的实验模型，并对数值计算结果进行修正。经多参数条件下实验，实现对固液两相流体中空蚀发生的微观过程进行准确描述，并探索研究在固液两相流体中具有抗空蚀性能的靶材材料类型。本课题是固液两相流体中空蚀机理研究的新思路、新方法，研究成果可为水轮机等水力机械空蚀机理、抗空蚀材料研究提供支撑。

中文关键词： 两相流；空泡脉动；空蚀；激光空化；

英文摘要： Aiming at mechanism of cavitation erosion near to boundary in solid-liquid two-phase flows, after analysis of physics process of cavitation erosion which is multiphase, wink state, microcosmic and stochastic and adoption of laser cavitation, high speed photography and hydrophone, a population research frame is set up for mechanism of cavitation erosion n solid-liquid two-phase flows and measurement of cavitation erosion intensity of target material. The equations of motion for bubbles, impulsion intensity of bubble collapse in solid-liquid two-phase fluid will be derived and solved by numerical method. The system of laser cavitation and measure will be designed. We will measure the collapse shock wave, rack of bubble wall, cavitation jet and erosion character under differ parameter of solid grain, boundary characteristic, water current characteristic. We can get experiment model of bubble cavitation erosion in solid-liquid two-phase fluid. Thus we can modify the theory model based the experiment model. Through the more characteristic experiment, we can describe the exactitude physics microcosmic course of the bubble cavitation erosion near to the boundary in solid-liquid two-phase fluid and study the material characteristic of anti- erosion and anti-abrasion.This project provide a new way to study cavitation ero

英文关键词： two-phase flow；bubble dynamics；cavitation；laser cavitation；