脉冲吹气下环量控制机翼的气动特性试验研究

Experimental Study on Aerodynamic Characteristics of Circulation Control Wing under Pulse Blowing

脉冲吹气消耗的气源少,控制效果更好,在无操纵面飞行器上有使用价值。本文对带有吹气装置的机翼模型进行了风洞测力试验,开展了脉冲吹气的增升、滚转控制效果研究,以及吹气脉冲频率、占空比等参数对翼型升力、滚转力矩的影响规律研究。结果表明,环量控制机翼在脉冲吹气情况下能够产生和定常吹气相当的增升效果,在占空比为0.8时,不同频率下脉冲吹气产生的升力系数和定常吹气时基本一致。同时,脉冲吹气能够产生飞行所需的滚转力矩,在占空比为0.8时,环量控制装置产生的滚转力矩最大。

Pulse blowing consumes less air source and has better control effect,so it is valuable in the flapless aircraft.In this paper,the wind-tunnel force measurement experiment of the wing model with air blowing device was conducted,the effect of pulse blowing on lift-enhancement and roll control was studied,and also the study on influence of pulse frequency,duty cycle and other parameters on lift and roll moment of the airfoil was conducted.The results show that under the condition of pulse blowing,the circulation control wing can produce the same lift effect as the steady blowing.When the duty cycle is 0.8,the lift coefficient of pulse blowing at different frequencies is basically the same as that of the steady blowing.At the same time,pulse blowing can produce the roll moment needed for flight.When the duty cycle is 0.8,the roll moment produced by the circulation control device is the largest.