基于LES湍流模型的角形喷嘴数值模拟

Numerical Simulation of Angular Nozzle Based on LES Turbulence Model

针对RANS方法存在空化流场预测不准确的问题,通过采用大涡模拟(LES)对角形喷嘴进行数值模拟来获得其瞬时速度场以及空化云分布。通过对其流场进一步分析,揭示了空化水射流在发展过程中漩涡结构与空化之间的关系以及不同压力下的射流分布特征,为工程实践应用及空化射流机理提供了理论参考。

Aiming at the problem that the cavitation flow field prediction is inaccurate for the RANS method,the instantaneous velocity field and cavitation cloud distribution were obtained by numerically simulating the angular nozzle by using large eddy simulation(LES).Through further analysis of the flow field,the relationship between the whirlpool structure and cavitation in the development process of the cavitation water jet,as well as the characteristics of the jet distribution under different pressures were revealed,which provides a theoretical reference for the application of engineering practice and the mechanism of cavitation jet.