中文摘要：

飞行器的变形方式可分为三大类：局部小变形、中等变形和大尺度变形。针对大尺度变形，提出了两种可变形概念：变前掠翼布局和可伸缩翼布局。通过数值方法计算分析了不同变形外形在不同马赫数下的升力、阻力和升阻特性，从中总结出适合于各个速度段的能够获得最大升阻比的最佳变形方式。结果表明：大尺度变形能够显著改变飞行器的升阻特性，使可变形飞行器能适应较广范围飞行条件的变化，因而在全飞行周期中比传统的固定外形飞行器具有更优的性能。

英文摘要：

There are three deformation mode of morphing aircraft： local small deformation, middling deformation and large-scale deformation. With large-scale deformation as aim, two morphing concepts were put forward： morphing forward swept wing and telescopic wing. Lift-drag characteristics of different deformation mode at different roach number were calculated and analysed , further the best deformation mode in different speed range was summarized to obtain maximum lift-drag raio. The results demonstrate that large-scale deformation can conspicuously change the lift-drag characteristics of an aircraft, and makes the morphing aircraft adapt the changes of flight range, therefore morphing aircraft has better performance comparing with conventional fixed-configuration aircarft.