摘要
本文从流体流动和传热的角度,对二维平行平板通道中空气绕流三角形钝体的流场进行了数值预测和相应的实验验证。湍流的时均值方程组用k-ε模型封闭,并经流函数-旋涡度变换后用有限差分法进行数值求解,在对流场壁面边界的处理上采取了更为简便的近似办法。
The k- ε two- equations turbulence model is used to close the time-averaged governing equations for the flow field. The finite difference equations in th& calculated region have been derived with the volume control method. A new approximation of the sub-laminar layer is adopted for the wall boundaries to give a higher calculating accuracy and a simplified programme. A programme using Gauss-Seidel iteration has been developed to be run on a PDP-11/70 computer and it is shown that it is convergent. An experiment has been performed in a test wind tunnel to check whether the prediction is correct. The velocity field is measured with a hot-wiremeter, but in the recirculating region of the flow field it is measured with a pitometer with a probe of flow direction. The temperature distribution is measured with fine copper-constantan thermo-couples. The experimental results agree fairly well with those by the numerical prediction.
出处
《华中理工大学学报》
CSCD
北大核心
1989年第3期25-32,共8页
Journal of Huazhong University of Science and Technology
关键词
钝体
湍流
传热
流场
数值预测
Bluff-Body
Turbulent flow
Heat transfer
Numerical prediction
Sub-laminar layer
