中文摘要：

针对限制客机及运输机飞行包线的跨声速抖振问题,该文采用数值模拟方法研究了基于Venturi管的切向狭缝吹气对其边界及载荷的控制作用。结果表明：在上翼面激波位置附近进行切向狭缝吹气控制,能增大跨声速抖振的始发迎角,且在迎角大于抖振始发迎角条件下显著增大升力;不同抖振迎角条件下,不同吹气位置、不同吹气总压比的切向狭缝吹气结果表明,在上翼面激波上游位置吹气,能有效抑制激波振荡,从而显著降低激波抖振强度并同时弱化分离泡之间的相互作用,进而形成了高频低能量激励;吹气总压比变化对该位置吹气的控制效果基本无影响;在激波中间位置及激波下游位置吹气,虽然也对抖振荷载有一定减缓作用但效果不显著。

英文摘要：

To study the transonic buffet that limit the flight envelope of both transporters and airliners, numerical simulations are conducted to investigate the effect of tangential slot blowing based on Venturi nozzle for both transonic buffet onset incidence angle and buffeting load. The results show that, tangential blowing from slots on the upper surface of airfoil can increase the onset incidence angle of transonic buffet, while it can greatly increase lift when the incidence angle is near and above the buffet onset angle; for different incidence angle in buffet state without blowing, numerical simulations for blowing slots at different span-wise locations with different total pressure ratios are carried out. The results indicate that, in case of tangential blowing at upstream of shock wave, the shock wave oscillation is depressed, thus the buffeting load is greatly reduced and the mutual-interference in-between the two separation bubbles downstream of shockwave is evidently weakened, inducing the high-frequency low-energy lift oscillations. At this blowing location, the buffeting loads are not sensitive to the blowing pressure ration. For blowing slots located at the mean and downstream locations of shockwave without blowing, the buffeting loads are not efficiently suppressed.