The invention discloses a trailing edge airflow control method for suppressing rotor blade-vortex interference noise, and belongs to an active flow control technology. In the flying process of a helicopter, the method can adjust the speed and the flowing direction of airflow on the trailing edge of the rotor according to the flying state, so that the load distribution on the surfaces of rotor blades is changed, and the effect of reducing BVI noise is achieved. When the airflow control device does not need to be started, the airflow control device is closely attached to the surface of the airfoil and is almost consistent with the original shape, so that the aerodynamic performance is not influenced. Compared with an ACF, the method provided by the invention has the advantages of no moving part, no need of an adjusting mechanism, less power consumption and simpler structure implementation, can achieve the same or even better BVI noise suppression effect as the ACF, and is a better choice.
本发明公开一种抑制旋翼桨‑涡干扰噪声的尾缘气流控制方法,属于主动流动控制技术。在直升机飞行过程中,本发明的方法可以根据飞行状态,调节旋翼尾缘气流的速度和流动方向,从而改变旋翼桨叶表面的载荷分布,达到降低BVI噪声的效果。当气流控制装置无需开启时,由于气流控制装置紧贴翼型表面,跟原始外形几乎一致,不会对气动性能造成影响。相比ACF,本发明的方法没有了运动部件,无需调节机构,耗费功率更少,结构实现起来更加简单,能够达到与ACF相同甚至更好的BVI噪声抑制效果,是一种较优选择。
Trailing edge airflow control method for suppressing rotor blade-vortex interference noise
一种抑制旋翼桨-涡干扰噪声的尾缘气流控制方法
2020-10-20
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
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