掺气条件下空化特性的高速摄影分析  

High speed photographic analysis of cavitation characteristics on the condition of aeration

作　　者：韩伟[1] 董志勇[1] 俞小伟[1] 张旭[1] 王立[1] 颜效凡[1] 李晓鹏[1] 朱芳[1] 

机构地区：[1]浙江工业大学水利与市政工程研究所,杭州310014

出　　处：《水动力学研究与进展（A辑）》2010年第3期352-358,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(50879078)

摘　　要：本文应用高速摄影技术在浙江工业大学水力学实验室直流式水洞中对半圆柱突体的空化结构进行了试验研究。试验流速为7～40m/s,高速摄影机拍摄速率为20000fps,曝光时间为4μs。观察了不同流速下半圆柱突体后空化云的形态以及掺气泡与空泡的相互作用情况,并考虑不同掺气浓度对掺气泡与空泡相互作用的影响。The cavitation structures of semi-cylindrical irregularity were investigated by using high speed photography in the Hydraulics Laboratory at Zhejiang University of Technology and presented in this paper.The experiment was carried out with flow speed 7 to 40 m/s,frame rate of the camera was 20000fps and exposure time 4μs.The cavitation structures of semi-cylindrical irregularity and the interaction between aeration bubbles and cavitation bubbles were observed.The effects of different gas concentrations on the interaction between aeration bubbles and cavitation bubbles were also involved.

关 键 词：半圆柱突体 空化空蚀 高速摄影技术 掺气浓度 掺气减蚀 

分 类 号：TV131.32[水利工程—水力学及河流动力学]