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跨声速抖振引起的非定常脉动载荷会造成飞行器结构疲劳甚至引发飞行事故,所以跨声速抖振的控制研究逐渐成为航空领域的热点。采用基于Spalart-Allmaras(S-A)湍流模型的非定常雷诺平均方程开展了基于谐振舵面的跨声速抖振抑制研究。首先验证静止NACA0012翼型的抖振边界和频率特性,然后分别从舵偏平衡位置、舵偏幅值、频率以及相角等角度研究了谐振舵面的控制效果。舵偏平衡位置等效于减小了翼型的有效迎角;幅值和频率对抖振抑制效果影响较大,当舵面振荡频率与抖振频率接近时发生共振现象;相角对控制效果有一定影响,在270°相角附近,升力系数幅值减小了60%。在合适的舵偏幅值、频率以及相角组合下,谐振舵面有可能成为跨声速抖振的有效开环控制策略。
The unsteady pulsating load caused by the transonic buffeting can lead to structural fatigue and even flight accidents. Therefore, the research on the control of transonic buffeting has become a hot topic in the field of aviation. Based on the Spalart-Allmaras (S-A) turbulence model unsteady Reynolds averaged equations based on the resonant rudder-surface cross-chatter suppression study. First, the buffeting boundary and frequency characteristics of the static NACA0012 airfoil are verified. Then the control effects of the resonance rudder surface are studied from the perspective of the rudder bias position, rudder deflection amplitude, frequency and phase angle. The balance position of the rudder is equivalent to reducing the effective angle of attack of the airfoil. The amplitude and frequency have a great influence on the buffeting suppression effect. When the rudder oscillation frequency is close to the buffeting frequency, the resonance phenomenon occurs. Has a certain impact, in the vicinity of 270 ° phase angle, the lift coefficient amplitude decreased by 60%. With the combination of suitable amplitude, frequency and phase angle of the rudder, the resonant rudder surface may become an effective open-loop control strategy for transonic chattering.