平板边界层转捩的仿真  

Simulation of Flat-Plate Boundary Layer Transition

作　　者：陈奕[1] 高正红[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《计算机仿真》2009年第3期77-81,共5页Computer Simulation

摘　　要：对计算流体力学(CFD)的难点问题——零压力梯度平板边界层转捩进行了成功仿真。利用商业软件FLUENT的二次开发功能,一种符合现代CFD技术要求的先进转捩模型——Gamma-Theta被用于仿真中,并采用了设置来流粘性比的新方法来进行基于SSTk-omega湍流模型的仿真。仿真结果表明,在不同的来流湍流水平下,Gamma-Theta转捩模型可以准确仿真包含自然转捩和bypass转捩现象的平板边界层流动,而设置来流粘性比的新方法对于成功的仿真也起到了关键作用。Zero - pressure - gradient flat - plate boundary layer transition, one of the complicated issues of Computational Fluid Dynamics （CFD） , was simulated successfully. Using the secondary development of the commercial CFD software FLUENT, an advanced transition model, which is fully compatible to modem CFD techniques, was adopted in the simulation. A new method to set the freestream viscosity ratio was used in the simulation based on SST k - omega turbulence model. The results of the simulation indicate that, at different freestream turbulent level, the Gamma - Theta model can accurately simulate the flat - plate boundary layer flows including natural and bypass transition, while the new method for setting the freestream viscosity ratio is a key factor for the successful simulation.

关 键 词：转捩模型 当地变量 平板边界层 二次开发 来流粘性比 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]