微型凸起流动控制用于翼型的减阻特性研究

微型凸起作为减小阻力的一种有效措施已经备受关注.开展了等熵压缩"弱激波"干扰鼓包用于RAE2822超临界翼型的减阻作用机制研究以及NACA0012对称翼型表面脊状结构减阻特性的数值模拟研究.结果表明:通过鼓包参数最优匹配,可达到弱化激波、减小波阻、提高升阻比、延缓抖振边界等目的;同时,通过对比不同脊状结构、不同网格密度对计算结果的影响,总结了多个速度下脊状表面的减阻规律.所得结论为进一步开展微型凸起类流动控制用于机翼的减阻特性研究奠定了坚实基础.

Drag Reduction Characteristic Research of Mini-protuberance Flow Control on Airfoil

As an effective measure of drag reduction,mini-protuberance has been attracted much attention.In order to develop the study of drag reduction mechanism,the weak shock control bump of quasic-isentropic compression on supercritical airfoil RAE2822 and riblet structure on symmetrical aerofoil NACA0012 are numerically investigated by Computational Fluid Dynamics in present paper.The results are as follows: the optimal parameters can weaken shock wave,reduce drag,increase the lift to drag ratio and delay buffet boundary.Meanwhile,By Comparing different riblet structure and mesh density,drag reduction rules of multi-velocity state are summarized.The above conclusions laid a solid foundation for further research on the drag reduction characteristic of wing using mini-protuberance folw control.