首页|Investigation on cavitating turbulent flow for the twisted NACA66 hydrofoil using a PANS model with helicity modification

Investigation on cavitating turbulent flow for the twisted NACA66 hydrofoil using a PANS model with helicity modification

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
In the present paper,the unsteady cavitating turbulent flow over the twisted NACA66 hydrofoil is investigated based on an modified shear stress transfer k-ω partially averaged Navier-Stokes(MSST PANS)model,i.e.,new MSST PANS(NMSST PANS)model,where the production term of kinetic energy in the turbulence model is modified with helicity.Compared with the experimental data,cavitation evolution and its characteristic frequency are satisfactorily predicted by the proposed NMSST PANS model.It is revealed that the interaction among the main flow,the reentrant jets,and sheet cavitation causes the formation of the primary shedding cavity near the mid-span and the secondary shedding cavity at each side of the twisted hydrofoil,and further induces the remarkable pressure gradient around shedding cavities.Along with the development of the primary and the secondary shedding cavities,the great pressure gradient associated with large cavity volume variation promotes the vortical flow generation and the spatial deformation of vortex structure during cavitation evolution,and results in the primary and the secondary U-type vortices.Further,dynamic mode decomposition(DMD)analysis is utilized to confirm the interaction among the main flow,the main reentrant jet and two side reentrant jets,and cavitation.These results indicate that the proposed NMSST PANS model is suitable to simulate the complicated cavitating turbulent flow for various engineering applications.

Cavitating turbulent flowpartially averaged Navier-Stokes(PANS)modelhydrofoilnumerical simulation

Chen Geng、Zhao-hui Qian、Ke-xin Zheng、Wei-xiang Ye、Xian-wu Luo

展开 >

State Key Laboratory of Hydroscience and Engineering,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China

Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China

National Natural Science Foundation of ChinaOpen Research Fund of Key Laboratory of Space Utilization,Chinese Academy of SciencesTsinghua National Laboratory for Information Science and Technology

52336001LSU-KFJJ-2021-04

2024

10.1007/s42241-024-0020-z

水动力学研究与进展B辑
中国船舶科学研究中心

水动力学研究与进展B辑

CSTPCDEI
影响因子：0.596
ISSN：1001-6058
年,卷(期)：2024.36(2)