摘要
通过数值求解雷诺平均N S方程 ,研究了二维翼型的大迎角粘性绕流 ,并分析了翼型的近场旋涡分离流动特性 .基于流动机理分析 ,文中进一步开展了二维非定常“质量引射”的数值分析 ,旨在对流场进行控制 ,探讨提高翼型升力的有效途径 .同时还比较了两种典型湍流模型 (BL模型和JK模型 )对这类复杂流动计算结果的影响 .
Turbulent flows over an airfoil at high angles of attack are investigated numerically by solving the Reynolds averaged Navier Stokes equations. Based on the calculated results, unsteady separated flow can be effectively controlled by a periodic mass injection suction near the leading edge. In this paper, two turbulent models, e.g., Baldwin Lomax model and Johnson King model are also employed in the calculations to test the effect of both models on calculated results; both models have similar action in the numerical turbulent simulation. The computations are in qualitative agreement with some experimental data for post stall vortex control.
基金
国家自然科学基金!(198892 10 )资助项目
关键词
湍流模型
涡控制
数值模拟
二维机翼
大迎角绕流
reynolds averaged navier stokes equations
turbulent model
unsteady vortex control
numerical simulation
