几种典型流动条件对平板转捩过程影响的数值模拟  

NUMERICAL INVESTIGATION OF FLAT PLATE TRANSITIONAL FLOW UNDER TYPICAL FLOW CONDITIONS

作　　者：徐星仲[1] 朱斌[2] 蒋洪德[2] 

机构地区：[1]北京航空航天大学404教研室,北京100083 [2]中国科学院工程热物理研究所,北京100080

出　　处：《工程热物理学报》1998年第5期559-564,共6页Journal of Engineering Thermophysics

基　　金：国家攀登B项目

摘　　要：采用作者构造的k方程转捩湍流模型，数值模拟了较大跨度来流湍流度情况、不同来流湍流度时几种不同顺、逆压梯度存在情况、壁面存在不同热交换强度情况下平板的转捩流动过程．与实验结果对比表明，新模型具有较好地模拟转捩流动能力。A series numerical tests of 2D-NS solver coupling with a new k-equation turbulence model, which is presented in last paper, are carried out to identify its capability of transitional flow modeling. The comparison of the numerical solution with experimental data and well-known correlations show a very promising result. In the case of zero pressure gradient, the start and the end of transition zone are correctly forecast and an overshoot of turbulence kinetic energy profile within transitional boundary layer is well modeled. Under adverse and favorable pressure gradient, the delay or promote of transition caused by different pressure gradient is also predicted well. For heated/cooled transitional flows, a quality-correct numerical results are obtained. The above-mentioned results show that this new turbulence model can be used for transitional flow prediction in a wide range of flow conditions.

关 键 词：转捩过程 数值模拟 平板 来流湍流度 转捩流动 

分 类 号：TK123[动力工程及工程热物理—工程热物理]