云状空化流动数值模拟的空化模型评价

为深入了解空化模型对云状空化流动计算的影响,分别采用Kubota,Singhal,Merkle,Kunz四种不同的空化模型对绕水翼的云状空化流动进行了数值模拟,获得了空穴形态和升、阻力等流场动力随时间的变化特性. 通过与实验结果的对比表明,这四种空化模型均可以准确地捕捉云状空化区域的空穴形态和空泡脱落的非定常细节;不同空化模型对计算所得的空穴形态和长度、绕翼型速度矢量场、升阻力均有影响, 但对流场动力特性的主要频谱分布影响不大.

Evaluation of the Cavitation Models on the Numerical Simulation of Cloud Cavitating Flows Around a Hydrofoil

Cloud cavitation flows around a hydrofoil are simulated to address issues in the cavitation model applications in the computation of cloud cavitating flows.Four cavitation models,including the Kubota model,Singhal model,Merkle model and Kunz model are evaluated in the present study.Numerical results are compared with experimental ones.It is shown that all different cavitation models can predict successively the characteristics of cavitation and the detailed process of the cavitation development.Influences o...