An investigation of cavitation control using a porous material on a hemispherical cylinder at various cavitation numbers  

作　　者：Fei-peng Yu Yi-gan Zhang Hao-kun Li Ze-hui Qu Hua-ping Liu 

机构地区：[1]School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan,430074,China

出　　处：《Journal of Hydrodynamics》2024年第5期870-882,共13页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52276030).

摘　　要：In this paper,a passive control method based on a porous material is applied to the surface of a hemispherical cylinder to control a cavitating flow,and the control effect of this method at different cavitation numbers(σ)is evaluated through the cavity morphology and volume,which is important for the application in engineering.The results indicate that the control effect is improved with a reduction in the cavitation number,for the reduction of vapor volume increases from 22%–50%withσdecreasing from 0.50–0.20.Further investigation indicates that the cavity inception at different cavitation numbers is still induced by the Kelvin-Helmholtz instability,while the spatial distribution of the vapor changes significantly.Moreover,the porous material suppresses the cavitating flow in the front region but enhances it downstream at large cavitation numbers.Whenσ=0.20,the cavitating flow is controlled in both the front and rear regions.

关 键 词：Cavitation control porous material Kelvin-Helmholtz instability spatial distribution 

分 类 号：O35[理学—流体力学]