摘要：A co.ventional Fowler flap is designed to improve the take-off and landing performances of an *** the flight states of general aviation aircraft vary significantly.A Fowler flap with a double-sliding track has been designed,which is capable of changing airfoil camber while cruising and climbing as well as meeting low-speed performance *** aerodynamic characteristics of the variable camber Fowler flap were studied by co.putational simulation,and cambering was found to be beneficial for improving the lift-to-drag ratio when the lift co.fficient was larger than the critical value,below which decambering was more effective:this critical value differed somewhat under different *** the mechanism into acco.nt,the take-off and landing co.figurations were optimized on the basis of the GA(W)-1 airfoil with a 30%chord Fowler *** with reference co.figuration,the maximum lift co.fficient of optimized take-off co.figuration was increased by 6.6%as well as the stalling angle and the lift-to-drag ratio were increased by 1.3° and 7.58%,***,the maximum lift co.fficient of the optimized landing co.figuration was increased by 6.3%,and the stalling angle was increased by 1.1°;however,the nose-down pitching moment of both co.figurations *** results were attained on a general aviation aircraft wing/body co.bination.A 3D model of the variable-camber Fowler flap driving mechanism was established in a co.puter-aided design system,and the results showed that all design co.figurations co.ld be achieved by the double-sliding track.