关键词: 主动流动控制, 环量控制, 飞翼布局, 滚转控制, 数值模拟, 飞行试验

Abstract: With jet active flow control technologies, the flying-wing aircraft are expected to achieve flapless flight which can improve the stealth characteristics. However, little research has been done on the tactical flying-wing platforms with medium aspect ratio. In this paper, a circulation control effector (CCE) is designed to replace the ailerons of a me-dium-aspect-ratio flying-wing UCAV. Numerical simulations and flight tests of the demonstrator are conducted to investigate the roll control effectiveness of the trailing-edge circulation control jet. In numerical simulations, the pressure inlet boundary is adopted, and the contribution of jet momentum is also considered in the aerodynamic force calculation. Then, the coupling simulation of the inner flow in CCE and the outer flow over flying-wing UCAV is realized, and the demonstrator’s aerodynamic characteristics are predicted. The simulation results show that with the increase of jet momentum coefficient, the roll control capability increases almost linearly, and there is no obvi-ous coupling yaw moment or pitch moment. The flight test results indicate that a remarkable roll control effective-ness is achieved by the CCE, with mean roll rate of 25.5-26.7°/s, maximum roll rate of 40.1°/s, and maximum roll angle of 83.9°.

Key words: Active flow control, Circulation control, Flying-wing aircraft, Roll control, Numerical simulation, Flight test