Numerical evaluation of cavitation shedding structure around 3D Hydrofoil: Comparison of PANS, LES and RANS results with experiments

9th International Symposium on Cavitation

Ji, B.^1,2 ; Peng, X.X.^3 ; Long, X.P.^1,2 ; Luo, X.W.^4 ; Wu, Y.L.^4

School of Power and Mechanical Engineering, Wuhan University, Hubei

430072, China^1

Key Lab of Jet Theory and New Technology of Hubei Province, Hubei

430072, China^2

China Ship Scientific Research Center, Wuxi

214082, China^3

State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing

100084, China^4

关键词: Cavitating;    Cavity shape;    Partially averaged navier stokes;    RANS modeling;    Reynolds-Averaged Navier-Stokes;    Shedding vortex;    Unsteady cavitation;    Vapor cavity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012127/pdf
DOI  :  10.1088/1742-6596/656/1/012127

来源: IOP

【 摘 要 】

Results of cavitating turbulent flow simulation around a twisted hydrofoil were presented in the paper using the Partially-Averaged Navier-Stokes (PANS) method (Ji et al. 2013a), Large-Eddy Simulation (LES) (Ji et al. 2013b) and Reynolds-Averaged Navier-Stokes (RANS). The results are compared with available experimental data (Foeth 2008). The PANS and LES reasonably reproduce the cavitation shedding patterns around the twisted hydrofoil with primary and secondary shedding, while the RANS model fails to simulate the unsteady cavitation shedding phenomenon and yields an almost steady flow with a constant cavity shape and vapor volume. Besides, it is noted that the predicted shedding vapor cavity by PANS is more turbulent and the shedding vortex is stronger than that by LES, which is more consistent with experimental photos.