计算物理 ›› 2003, Vol. 20 ›› Issue (3): 273-278.

• 论文 • 上一篇    下一篇

非结构网格上的B-B单方程模型湍流计算

成娟, 黄明恪   

  1. 南京航空航天大学空气动力学系, 江苏 南京 210016
  • 收稿日期:2002-01-28 修回日期:2002-06-03 出版日期:2003-05-25 发布日期:2003-05-25
  • 作者简介:成娟(1968-),江苏盐城,副教授,博士,从事计算流体力学方面的研究.
  • 基金资助:
    航空科学基金(02A520040)资助项目

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

CHENG Juan, HUANG Ming-ke   

  1. Department of Aerodynamics, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
  • Received:2002-01-28 Revised:2002-06-03 Online:2003-05-25 Published:2003-05-25

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.

关键词: 非结构网格, 湍流模型, 粘性流动, 数值计算

Abstract: 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.

Key words: unstructured grid, turbulence model, viscous flow, numerical computation

中图分类号: