双后掠飞翼布局参数对气动力的影响分析

摘要

The aerodynamic effect of parameters including aspect ratio, spanwise position of the leading edge kink, leading edge sweep of the inboard wing and leading edge sweep of the outboard wing, were studied for outboard dual-swept flying wing configuration. The effects of parameters variation on lift coefficient and lift-to-drag ratio were obtained. The results showed that: Firstly, the changing trend of aerodynamic forces with every parameter presented to be nonlinear. Secondly, the spanwise position of leading edge kink, leading edge sweep of the inboard wing and aspect ratio have relatively remarkable effect on the aerodynamics. Finally, the aerodynamic characteristics could be improved by decreasing the distance from leading edge kink to A/c centerline and leading edge sweep of the inboard wing, or increasing the aspect ratio. Additionally, the result showed that different parameters had an interactively coupling effect on aerodynamic characteristics.%以国外双后掠飞翼布局为例,选取展弦比、前缘拐折展向站位、内翼前缘后掠角和外翼前缘后掠角作为研究参数,分析了单参数和组合参数变化对气动力的影响.结果表明:各参数对气动力的影响呈非线性变化;前缘拐折展向站位、内翼前缘后掠角和展弦比对升力系数和升阻比的影响相对较大;要提高升力系数和升阻比,需减小前缘拐折展向站位和内翼前缘后掠角,增大展弦比,并注意各参数之间的耦合作用.