非结构网格上的B-B单方程模型湍流计算  

Turbulent Flow Calculation Using B-B One Equation Turbulence Model on Unstructured Meshes

作　　者：成娟[1] 黄明恪[1] 

机构地区：[1]南京航空航天大学空气动力学系,江苏南京210016

出　　处：《计算物理》2003年第3期273-278,共6页Chinese Journal of Computational Physics

基　　金：航空科学基金(02A520040)资助项目

摘　　要：　研究如何在非结构网格上进行Navier Stokes(N S)方程湍流计算.采用格心有限体积方法离散N S方程.为了适应非结构网格,计算所用的湍流模型特别选用Baldwin Barth(B B)单方程模型.此模型由一个单一的具有源项的对流扩散方程组成.为了能在非结构网格上求解B B单方程模型,提出一显式有限体积格式,并直接对带源项的格式进行稳定性分析,得到了相应的时间步长限制条件.最后以平板、RAE 2822翼型、多段翼型绕流等数值算例验证了计算方法的有效性.How to calculate turbulent flow by solving NavierStokes equations on unstructured grids is investigated.The cellcenter finite volume method is used to solve NS equations.BaldwinBarth one equation turbulence model is chosen to calculate turbulent flow which is especially suitable to unstructured meshes.The model consists of a single advectiondiffusion equation with a source term.In order to solve this model equation on irregular grids,an explicit finitevolume scheme is delivered,and its time step limiting condition is obtained by analyzing stability of the scheme which possesses a source term.At the end,the numerical examples,such as turbulent flow around flat,RAE2822 foil and multielement foil,are given which verify the validation of the computational method.

关 键 词：非结构网格 B-B单方程模型 湍流模型 数值计算 格心有限体积方法 粘性流动 NAVIER-STOKES方程 

分 类 号：O357.5[理学—流体力学]