二维翼大迎角绕流湍流模型及涡控制的数值研究 稹⑸缁岜U匣稹⒈O展镜取8没鹂梢怨⑿姓?,向公众、机构投资者、企业、证券基金、保险公司等进一步筹措资金 ,也可通过担保基金担保向银行贷款。总之

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 .

Numerical Simulation of Post-stall Vortex Control on an Airfoil by Using Two Turbulent Models

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.