变掠翼无尾飞机气动布局设计研究

Research of variable forward-sweep wing tailless aircraft aerodynamic configuration design

为了使得作战飞机在不同的速度阶段始终保持良好的空气动力性能,提出了一种通过改变机翼前掠角进而改变机翼平面形状的方法,来始终保持最佳气动效率——变前掠翼无尾气动布局,即超声速飞行状态(三角翼)、低速飞行状态(平直翼)以及高机动飞行状态(前掠翼)。采用仿真的方法,对上述3种外形进行了数值模拟计算,得出了3种外形的纵向气动性能数据。结果表明,变前掠翼无尾气动布局具有良好的气动性能和隐身性能,并且可为后续的型号研制奠定理论基础。

To constantly maintain good aerodynamic performance at different stages of the flight speed,this paper puts forward a method by changing the wing forward sweep angle and changing the shape of the wing plane to maintain the best aerodynamic characteristics—variable forward-sweep wing tailless configuration,including supersonic flight state(delta wings),low speed flight(straight wings)and the high maneuvering flight(forward sweep wings).Using the simulation method,the numerical simulation of the three shapes is carried out,and the longitudinal aerodynamic performance data of the three shapes are obtained.The simulation results show that the variable forward-sweep wing tailless aerodynamic configuration has good aerodynamic characteristics and excellent stealth,and can lay a theoretical foundation for the subsequent model development.