Experimental and Numerical Evaluation of the Cavitation Performances of Self-Excited Oscillating Jets  

作　　者：Yuanyuan Zhao Fujian Zhao Guohui Li Wei Xu Xiuli Wang 

机构地区：[1]School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang,212013,China [2]Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang,212013,China [3]GongQing Institute of Science and Technology,Jiujiang,332020,China [4]School of Energy and Power Engineering,Jiangsu University,Zhenjiang,212013,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第8期1883-1901,共19页流体力学与材料加工（英文）

基　　金：supported by Key Projects of the Joint Fund of the National Natural Science Foundation of China(U20A20292);The Fundamental Research Funds for the Central Universities(No.JZ2021HGB0090);Key R&D Program of Zhenjiang City(GY2020015);Technology Support Plan(Research on Key Industrial Technologies)(TG202251);Shandong Province Science and Technology SMES Innovation Ability Improvement Project(2023TSGC0005).

摘　　要：Self-excited oscillating jets(SOJ)are used in several practical applications.Their performances are significantly affected by structural parameters and the target distance.In this study,a geometric model of the SOJ nozzle accounting for multiple structural parameters is introduced,then the related cavitation performances and the optimal target distance are investigated using a Large-Eddy Simulation(LES)approach.Results are also provided about an experiment,which was conducted to validate the simulation results.By analyzing the evolution of the vapor volume fraction at the nozzle outlet,a discussion is presented about the effect of the aforementioned structural parameters on the cavitation performances and the target distance.It is shown that the distribution of cavitation clouds at the outlet of the SOJ nozzle displays a non-monotonic trend(first increasing,then decreasing).Under working conditions with an inlet pressure of 4 MPa,a SOJ nozzle outlet/inlet diameter ratio(D_(1)/D_(2))of 1.2,and a chamber diameter ratio(D/L)close to 1.8,the nozzle outlet cavitation performance attains a maximum.The optimal structural parameters correspond to the optimal target distance,which is near 50 mm.The experiments have revealed that the SOJ nozzle with the above parameters displays a good cavitation erosion effect at the target distance of 50 mm,in satisfactory agreement with the numerical simulation results.

关 键 词：Self-excited oscillating nozzle cavitating jet target distant LES CAVITATION 

分 类 号：O35[理学—流体力学]