扰动风作用下多段翼型流动的数值模拟及流动控制  

Numerical simulation of gusts over multi-element airfoils and their flow control

作　　者：李亮[1] 李孝伟[1] 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《空气动力学学报》2013年第6期710-717,共8页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(10672097);上海市自然科学基金(13ZR1415700)

摘　　要：运用有限体积法、双时间推进法、动态嵌套网格技术、网格速度法等数值技术实现了多段翼型在扰动风作用下的非定常流场的数值计算,并研究了襟翼摆动对扰动风下多段翼型上的气动力的作用和控制规律。首先,运用NACA0006翼型阵风响应的理论解对本文数值方法的可靠性进行了验证。然后,对带30%襟翼的GW-2翼型在具有垂直于来流方向的周期性扰动风环境下的气动力性能进行数值计算,结果表明:多段翼型的升力随时间亦呈现周期性变化,其周期变化频率与扰动风频率相同,升力的波动幅值与扰动风幅值呈正比关系。进一步地,通过改变襟翼的摆动幅值和摆动相位的办法,研究了襟翼运动对扰动风的作用和控制规律,结论是:针对一定频率的扰动风,运用适当幅值和相位的襟翼摆动加以控制。Various numerical simulation techniques, such as finite-volume cell-centered method, dualtime stepping method, moving overset grid method and grid speed method, were used to implement the numerical simulation of unsteady viscous flows over multi-element airfoils in gusts. Effects of a swinging flap on aerodynamic forces were studied, and the control law of the flap as well. The method used in the paper was first validated by comparison with the theoretical solution of NACA0006 airfoil under gust. Then a GW- 2 airfoil with 30% flap was simulated under a periodic gust perpendicular to the incoming flow. The result shows that the lift of the multi-element airfoil changes periodically with time, the change of flap lift has the same frequency with the gust, and the lift fluctuating amplitude is in proportion to the gust amplitude. Further study shows that by properly changing the gust oscillating amplitude and phase, lift fluctuations of the airfoil can be brought under control.

关 键 词：多段翼型 扰动风 流动控制 双时间推进法 动态嵌套网格 

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]