升力体布局飞行器偏航气动增稳方法研究.

Lifting body configuration generally has weaker directional stability, hence an aerodynamic stability augmentation method is presented. In this method, the after-body?s side edges were cut to curved form, making the surface flow from expanding to compressing, the side aerodynamic force was drawn back, and the directional pressure center was drawn back simultaneously so the directional static stability was improved. In this paper, one single cone lifting body configuration was analyzed by this method，and the computational fluid dynamics method was applied in the analysis work. The analysis results showed that less cutting scope could improve the directional static stability remarkably under the moderate attack angle, but the longitude static stability, the lift to drag ratio and the lateral static stability would decrease for different levels in the same time. The main reason was that the compressing effect was decreased for the expanding effect on the side face, and the expanding effect was produced by the upwards flow coming from downside. In this paper, the lateral-directional stability influence by the side edge cutting was presented too. This method improves the directional static stability without any further directional stable rudder, it may become one of the choices for those correlative configuration design and optimization. [ABSTRACT FROM AUTHOR]