应用于翼型绕流的线性/非线性湍流模式的研究  

Experimental and numerical studies on tile-shaped aerospike nozzle

作　　者：褚洪杰[1] 马晖扬[1] 

机构地区：[1]中国科学院研究生院,北京100049

出　　处：《空气动力学学报》2005年第2期237-242,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(编号90205002).

摘　　要：本文选取了四个线性湍流模式、四个非线性涡粘性湍流模式和一个显式代数应力模式对绕翼型的不可压缩分离流动进行了数值模拟。因计算鲁棒性的需要,其中部分模式在壁面附近耦合了一方程模式。通过与实验结果的比较,对翼型在大攻角情况下流动产生分离的气动特性进行了评估。计算结果表明,非线性模式能够较好地反映湍流的各向异性和曲率影响。This paper presents the simulation of incompressible separated flow around airfoil by solution of the Reynolds-Averaged Navier-Stokes equations with turbulence closure achieved using four linear turbulence models, four nonlinear eddy-viscosity turbulence models and one explicit algebraic stress model. Because of the need of robustness, some models above are coupled with one-equation model near the wall. The ability of these turbulence models to predict the flow is investigated. Aerodynamic characteristics of airfoils accompanied by separation have been evaluated. Comparisons between the model predictions and experiment data show the anisotropy and curvature effects of turbulence can be well accounted with nonlinear models.

关 键 词：不可压缩分离流动 翼型绕流 湍流 湍流模式 

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]