不可压缩湍流非对称脱体涡流场数值分析

NUMERICAL SIMULATION FO INCOMPRESSIBLE ASYMMETRIC TURBULENT VORTICAAL FLOW

采用拟压缩性方法，Ｂｅａｍ－Ｗａｒｍｉｎｇ近似因式分解格式数值求解三维定常不可压Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程。对Ｂａｌｄｗｉｎ－Ｌｏｍａｘ代数湍流模型，采用Ｄｅｇａｎｉ－ｓｃｈｉｆｆ修正。计算绕尖头正切拱型旋成柱体的大迎角大雷诺数脱体涡流场，计算结果中的非对称脱体涡与实验相符．

The method of pseudocompressiblity is used in solving the three-dimensionalsteady incompressible Navier-Stokes flows。The solution procedure employs the Beam-Warming implicit approximate factorization scheme。The Baldwin-Lomax algebraic tur-bulent model together with the Degani-Schiff modiffication is used for Reynolds-averagedNavier-Stokes equations to numerically simulate the high-incidence, great Reynolds number,vortical flow about a tangent-ogive cylinder the asymmetric numerical results are in goodagreement with experiment。