水利学报2017，Vol.48Issue(8)：993-1001,9.DOI:10.13243/j.cnki.slxb.20161184
基于转捩SST模型的钝尾缘水翼绕流数值计算与分析
Numerical investigation of flow around blunt trailing edge hydrofoil using transition SST model
摘要
Abstract
Boundary layer transition is one of the primary factors that affect the hydrodynamic characteristics of flow over hydrofoils.This paper presents numerical calculations of flow around the NACA0009 blunt trailing edge hydrofoil at angle of attack 0° by coupling the γ-Reθt transition model and the SST k-ω model,aims to explore the applicability of the γ-Reθt transition model in predicting of boundary layer transition and wake vortex shedding with low free-stream turbulence intensity.The sensitivity of the calculation model to the grid resolution is examined.The boundary layer,features of the wake,and the vortex shedding characteristics of flows at different free-stream velocities are predicted.The calculation results are compared with experimental data and the prediction by the SSTk-ω model.It is shown that the transition location of the hydrofoil boundary layer moves upstream with increasing y+ of the first grid near the wall.The predicted transition location converges to a fixed point when the maximum y+ less than 1.Compared with the SSTk-ω model,the transition SST model shows better prediction of eddy viscosity in the boundary layer and the wake region.The boundary layer thickness and wake flow parameters obtained by the transition SST model agree well with the experimental data.The results shown that the transition SST model can give promising prediction of the frequency of the vortex shedding,with a maximum relative error of 6.2 ％ for flows at different Reynolds number.关键词
水翼/边界层转捩/γ-Reθt转捩模型/尾涡脱落Key words
hydrofoil/boundary layer transition/γ-Reθt transition model/vortex shedding分类
建筑与水利引用本文复制引用
黎耀军,陈俊,姚志峰,刘竹青,杨魏..基于转捩SST模型的钝尾缘水翼绕流数值计算与分析[J].水利学报,2017,48(8):993-1001,9.基金项目
国家自然科学基金项目(51409147) （51409147）
中央高校基本科研业务费专项资金项目(2015SYL001) （2015SYL001）
