赵俊波, 沈清. 升力体布局飞行器偏航气动增稳方法研究[J]. 空气动力学学报, 2016, 34(3): 322-326. DOI: 10.7638/kqdlxxb-2015.0010
引用本文: 赵俊波, 沈清. 升力体布局飞行器偏航气动增稳方法研究[J]. 空气动力学学报, 2016, 34(3): 322-326. DOI: 10.7638/kqdlxxb-2015.0010
Zhao Junbo, Shen Qing. Directional stability augmentation method for a lifting body configuration[J]. ACTA AERODYNAMICA SINICA, 2016, 34(3): 322-326. DOI: 10.7638/kqdlxxb-2015.0010
Citation: Zhao Junbo, Shen Qing. Directional stability augmentation method for a lifting body configuration[J]. ACTA AERODYNAMICA SINICA, 2016, 34(3): 322-326. DOI: 10.7638/kqdlxxb-2015.0010

升力体布局飞行器偏航气动增稳方法研究

Directional stability augmentation method for a lifting body configuration

  • 摘要: 针对升力体飞行器偏航弱稳定性问题,提出了一种基于当地侧向流动膨胀/压缩原理的偏航气动增稳方法。通过对升力体后体侧缘进行曲线切削,造成切削表面流动先膨胀后压缩的气动效应,从而使得侧向气动力后移,以此实现航向压心后移、偏航静稳定性提高的目的。采用数值方法对单锥升力体布局进行了方法验证,算例表明较小的侧面切削可以大幅提高中小攻角状态偏航静稳定性,但也同时会不同程度地降低飞行器纵向静稳定性、升阻比以及横侧静稳定性。本方法在改善升力体布局航向静稳定性的同时,具有不带来航向附加气动安定面的优点,可引入相关布局设计优化之中。

     

    Abstract: 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.

     

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