低速两段翼型的数值模拟

在多段翼型风洞实验中，很难观察翼型不同迎角下主翼、襟翼上的绕流及缝道流动。使用了O-H型混合的结构化网格，采用k-ε二方程湍流模型求解可压的N—S方程来模拟二元风洞中两段翼型的流场。计算结果与实验进行了比较，结果表明：计算与实验结果吻合良好，说明本方法可以较好地模拟两段翼型的绕流，并能很好地显示流场的变化情况。另外，从结果中可以看出：随着迎角的变化，主翼尾流和缝道间的流动对襟翼附面层分离有很大的影响作用。

Numerical Simulation of Two-Element Airfoil at Low Mach Number

It was difficult to observe the flows over main element and flap of multi-element airfoil at different angles of attack in wind tunnel experiment . This paper has undertaken a computational study with the solution of the N-S equation and used O-H hybrid structure grid to simulate the flow around the two-element airfoil in a two-dimensional wind tunnel. The k-ε turbulence model is adopted for the numerical simulation. The results of computation agree well with experiment and it illuminates that this numerical method can availability simulate the flow around the two-element airfoils and the change of the flow. And it shows the function that flows over main element and flap gap of multi-element airfoils influences intensively the separated flow on the flap element of multi-element airfoils.