摘要
分离涡模型(DES,Detached eddy simulation)兼有雷诺时均湍流模型计算量较小和大涡模拟计算精度高的优点。本文利用DES对平板单斜圆柱孔的气膜冷却进行了数值模拟,并将结果同RANS湍流模型的计算结果以及实验数据相比较,表明DES能有效弥补RANS湍流模型在计算三维不均匀非定常湍流场的不足,更接近实际地反映了气膜冷却中的流动和换热的本质规律。
The detached eddy simulations or DES is a hybrid turbulence modeling method which combines the efficiency of RANS turbulence model and the accuracy of large eddy simulation into one framework. Detached eddy simulation of film cooling on a flat plate generated by a single cylindrical hole is presented here. Good agreements were obtained in comparison between the present numerical predictions and others' experimental and numerical results. DES has been proven to be a more effective turbulence model to reproduce the dynamic, anisotropic, three-dimensional nature of film cooling flow and thermal field than traditional RANS models.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第4期668-670,共3页
Journal of Engineering Thermophysics
基金
国家杰出青年科学基金资助项目(No.50025617)
关键词
分离涡模拟
混合湍流模型
气膜冷却
数值计算
detached eddy simulation
hybrid turbulence model
film cooling, numerical simulation
