Numerical study on aerodynamic characteristics of a new type of compound wing with ground effect
Wing configuration is an important parameter affecting the performance of WIG aircraft.A new configuration of compound was proposed,using computational fluid dynamics(CFD)and selecting the Realizable k-ε turbulence model to simulate the flow structure in the area around the wing surface.The accuracy of the numerical simulation method was verified by comparing the calculated results of the aerodynamic characteristics of the rectangular wing with the NACA6409 airfoil.Numerical simulation was carried out on the aerodynamic characteristics of composite wing under ground effect,the influence of angle of attack and height above the ground on aerodynamic characteristics was studied,and a comparative analysis was carried out with rectangular wing.The results show that the aerodynamic performance of the composite wing has a certain improvement compared with the rectangular wing,and the improvement mainly focuses on the reduction of drag and the increase of lift-to-drag ratio,and the improvement is obvious at low ground clearance and high angle of attack.The compound wing has greater turbulent kinetic energy,but the suction effect is smaller than that of the rectangular wing,and the degree of airflow separation at the trailing edge is greater.This study provides a reference for the design of high-performance ground-effect aircraft wing configuration.
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