排灌机械工程学报2025，Vol.43Issue(9)：914-922,9.DOI:10.3969/j.issn.1674-8530.24.0014
低体积浓度含沙条件下水翼空化特性分析
Investigation of cavitation characteristics of hydrofoils under low volume concentration of sand conditions
摘要
Abstract
To investigate the effect of low volume concentration of sand conditions on the cavitation charac-teristics of hydrofoil,a modified RNG k-ε turbulence model and SIMPLEC algorithm were used.Based on the discrete phase model and Schnerr-Sauer cavitation model,the unsteady cavitation flow around NA-CA0015 hydrofoil under low volume concentration and coarse-grained sand conditions was numerically simu-lated.The effects of particles of different volume concentrations and diameter sizes on the cavitation flow field of hydrofoil were analyzed to reveal the mechanism of particle action on cavitation development.The results indicate that increasing the particle volume concentration at the same particle size and increasing the particle diameter at the same volume concentration result in an increase followed by a decrease in the lift coefficient of the hydrofoil.The effect of solid-phase on the drag coefficient of the hydrofoil has a smaller effect,in which the particle diameter has a greater effect on the lift-to-drag ratio of hydrofoil.Compared with the clear water condition,the hydrofoil cavitation bubble shedding position is closer to the leading edge of the hydrofoil and the shedding time is shorter.With the increase of particle volume concentration and particle diameter,the volume of the cavitation bubble first decreases and then increases.The influence of the particles on the development of cavitation is first inhibited and then facilitated.The cavitation flexibility of the hydrofoil varies between positive and negative for both clear water and sandy conditions,with the in-tensity of the cavitation flexibility fluc-tuations increasing and then decreasing as the particle volume con-centration increasing.关键词
NACA0015翼型/空化/颗粒体积浓度/颗粒粒径/数值模拟Key words
NACA0015 hydrofoil/cavitation/particle volume concentration/particle diameters/numerical simulation分类
农业科技引用本文复制引用
赵伟国,李家豪,杨良,张栩..低体积浓度含沙条件下水翼空化特性分析[J].排灌机械工程学报,2025,43(9):914-922,9.基金项目
国家自然科学基金资助项目(52169018) （52169018）
中央引导地方科技发展资金项目(23ZYQA0320) （23ZYQA0320）
甘肃省教育厅产业支撑计划项目(2021CYZC-27) （2021CYZC-27）
