装载约束下飞翼布局气动与隐身综合设计

基于飞翼布局大鼓包式机身,在装载布置约束下开展了气动与隐身综合设计,提出了一种机身低鼓包和双鼓包模型。结合可靠的CFD和隐身计算方法,初步探索了低鼓包和双鼓包气动与隐身特性及机理。结果表明:双鼓包模型极大地降低了全机纵向基本气动性能,但在大迎角时会推迟外翼段前缘分离,对外翼气动特性有一定改善;低鼓包与双鼓包模型整体上RCS差异较小,但双鼓包模型侧向隐身性能更优异。

Integrated design on aerodynamic and stealthy of flying wing unmanned aerial vehicle based on load arrangement restrict

Based on the big bulge in the fuselage of flying wing with twin-engine, integrated design and analysis on aerodynamic and stealthy characteristics for flying wing UAV was conducted based on load arrangement restrict.And then a kind of fuselage with low bump and double bumps was proposed for flying wing UAV.Using CFD method and stealthy simulation verified, preliminary exploration on aerodynamic and stealthy characteristics and mechanism were carried out on flying wing UAV with low bump and double bumps.Results indicated that the longitudinal aerodynamic performance of flying wing UAV with double bumps decreases obviously, but its spanwise pressure gradient will delay the separate flow on the leading edge of outer wing;As a whole, the RCS value is similar on the low bump model and double bumps model, but the side stealthy characteristics of the double bumps model is better than the low bump model.