| 非结构网格上的B-B单方程模型湍流计算 |
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| 引用本文： | 成娟,黄明恪.非结构网格上的B-B单方程模型湍流计算[J].计算物理,2003,20(3):273-278. |
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| 作者姓名： | 成娟 黄明恪 |
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| 作者单位： | 南京航空航天大学空气动力学系, 江苏 南京 210016 |
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| 基金项目： | 航空科学基金(02A520040)资助项目 |
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| 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.
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| 关 键 词： | 非结构网格 湍流模型 粘性流动 数值计算 |
| 文章编号： | 1001-246X(2003)03-0273-06 |
| 收稿时间： | 2002-01-28 |
| 修稿时间： | 2002年1月28日 |
Turbulent Flow Calculation Using B-B One Equation Turbulence Model on Unstructured Meshes |
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| CHENG Juan,HUANG Ming-ke.Turbulent Flow Calculation Using B-B One Equation Turbulence Model on Unstructured Meshes[J].Chinese Journal of Computational Physics,2003,20(3):273-278. |
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| Authors: | CHENG Juan HUANG Ming-ke |
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| Institution: | Department of Aerodynamics, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China |
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| 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. |
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| Keywords: | unstructured grid turbulence model viscous flow numerical computation |
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