伸缩机翼变体飞机气动特性研究

Aerodynamic Characteristics of Morphing Aircraft of Telescoping Wing

伸缩机翼变体飞机通过机翼伸缩调整机翼展长,从而改变机翼面积和展弦比,改变飞机的气动布局和机翼的气动特性,满足多任务点的设计要求。简要介绍伸缩机翼变体飞机的发展历史,重点研究一种采用伸缩机翼设计的超音速飞机的气动特性变化。研究结果表明:亚音速时机翼展长伸长,展弦比增大,飞机诱导阻力降低,升阻比提高,可以明显提高飞机的航程;超音速时机翼展长缩短,展弦比减小,飞机的波阻降低,升阻比增大,提高了超音速飞行性能。伸缩机翼概念用于超音速飞机设计时能很好地兼顾亚音速巡航和超音速冲刺。

Morphing aircraft of telescoping wing can change wing area and aspect ratio,change wing configuration and aerodynamic characteristics by a variable-span morphing wing,which accommodate multiple flight conditions.The development history of morphing aircraft of telescoping wing is introduced in brief,and the aerodynamic characteristics of a supersonic air vehicle with the concept of telescoping wing is mainly explored.The results of the analysis demonstrate an improvement in the aerodynamic characteristics of the morphing aircraft of telescoping wing.Wing span extension in subsonic represents an increase in aspect ratio and enhance the liftdrag ratio,in the form of a reduction in the induced drag,resulting in an increase in range.The wing span contraction represents a reduction in the aspect ratio and cut down the wave drag in supersonic,resulting in an increase in lift-drag ratio and improvement of flight performance of supersonic.Telescopic wing can take good consideration of both subsonic cruise and supersonic flight in supersonic aircraft design.