农业机械学报2025，Vol.56Issue(5)：361-369,9.DOI:10.6041/j.issn.1000-1298.2025.05.034
考虑能量传递效率的水翼空蚀数值预测分析
Numerical Prediction Analysis of Cavitation Erosion of Hydrofoils Considering Energy Transfer Efficiency
摘要
Abstract
Accurately predicting the erosion regions is always a challenging point of numerical cavitation erosion simulation,which is beneficial for designing and extending the lifespan of the hydraulic machinery.The density-corrected SST k-ω turbulence model and the Sauer cavitation model were used to simulate the unsteady cavitation around NACA0009 3D twisted hydrofoil.The accuracy of the current numerical method was verified by comparing the cavitation shedding frequency and transient cavity behaviors in the experiment.Considering the energy transfer efficiency,a propagation relationship of cavitation energy from the flow field space radiation to the wall was constructed,thereby predicting the wall erosion load.By comparing the erosion energy and erosion load on the hydrofoil surface at different instants,it was found that compared with cavitation energy,the erosion load,which comprehensively considered the influence of erosion energy from the whole flow field on hydrofoil surface,predicted a wider coverage erosion area.Moreover,the average wall surface erosion intensity distribution was obtained.By time-averaging the wall surface erosion intensity solved from each instantaneous time step within 12 cycles,and by comparing the average wall surface erosion intensity obtained from the erosion energy and erosion load with the experimental erosion results,it was demonstrated that the erosion area predicted by time-averaged erosion load was more agreeable to the experiment result,indicating that it was necessary to consider the energy transfer efficiency when predicting cavitation erosion.关键词
NACA0009三维扭曲水翼/能量传递效率/空蚀能量/空蚀载荷Key words
NACA0009 3D twisted hydrofoil/energy transfer efficiency/erosion energy/erosion load分类
能源科技引用本文复制引用
耿琳琳,方海渊,曹彦涛,郑恩慧,李宁..考虑能量传递效率的水翼空蚀数值预测分析[J].农业机械学报,2025,56(5):361-369,9.基金项目
国家自然科学基金青年科学基金项目(52409115)、江苏省青年科学基金项目(BK20220538)和喷水推进技术重点实验室开放基金项目(JCKY2024206D002) （52409115）
