用DES数值模拟具有横向喷流的紊流流场  

The Computation of the Lateral Jet Turbulence Flow Using DES Method

作　　者：刘学强[1] 伍贻兆[1] 

机构地区：[1]南京航空航天大学航空宇航学院空气动力学系,江苏南京210016

出　　处：《航空学报》2004年第3期209-213,共5页Acta Aeronautica et Astronautica Sinica

基　　金：国防预研资助项目(K1601060309)

摘　　要：DES(DettachedEddySimulation)是把RANS(雷诺平均Navier Stokes方程)方法及LES(大涡模拟)方法结合起来的模拟有脱体涡的紊流流场的数值模拟方法。其主要思想是在物面附近解雷诺平均Navier Stokes方程、在其他区域采用Smagorinski大涡模拟方法。本文用DES及混合非结构网格数值模拟复杂紊流流场,算法采用Osher逆风格式,对超音速钝头体、三角翼、某型飞机及带喷流的导弹绕流用该程序进行了数值模拟。结果表明用DES模拟有分离的紊流流场是高效的。DES(Detached Eddy Simulation)is the hybrid method combining with the RANS and LES to simulate the flow-field with detached eddies. The main idea is that, near the wall, the RANS is used and in the other field the LES method is used. In this paper, the DES method is used to simulate the complicate turbulence flow-fields on hybrid unstructured grids and the Osher scheme is used for the spatial discretisation. Many cases(flows past blunt body, Delta wing, aircraft and missile with lateral jets) are used to validate this method. All the results demonstrate that the DES method is very efficient for the simulation of the separated turbulence flow-fields.

关 键 词：紊流模型 大涡模拟 DES 混合网格 逆风格式 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]