不同空化模型对附着空化的数值模拟与评价

In order to analyze a application of Singhal cavitation model and Schner-Sauer cavitation model in steady cavitation simulation, the steady cavitating flows over a 2D NACA0009 (MOD) hydrofoil with angle of attack of 2.5° and Re=2×10⁶ are numerically investigated based on RANS method by Fluent 18.2. The Realizable k-ε turbenlence model and Mixture multiphase model are used for numerical simulation. The cavitation number is between 0.75 and 0.90. Simulated results of the two cavitation models were analyzed and compared with experimental data. The results show that the length of cavity increases as the cavitation number decreases, and the pressure distributions of hydrofoil leading edge simulated by the two cavitation models are significantly different. The cavitation range simulated by Singhal cavitation model is larger. On the near-wall surface and in cavity wake region, both cavitation models cannot be used to accurately capture complex flow phenomena.