Aerodynamic and flutter characteristics of diamond back wing

Diamond back wing is a new-style high lift-drag ratio aerodynamic component. Computational fluid dynamics (CFD) numerical simulation method was used to calculate the aerodynamic characteristics of the combination of diamond back wing and square cross-section body. Aerodynamic characteristics of the combination of diamond back wing and square cross-section body and one of single fore wing and square cross-section body were compared. Aerodynamic characteristics of the combination with variable relative heights and distances between fore wing and rear wing were calculated. PK method was selected to result the flutter equations of the single fore wing and the diamond back wing. The results indicate that the diamond back wing is very compact. It can increase lift, lift-drag and footprint of aircraft. If the fore wing is upper than the rear wing, the lift would increase. The diamond back wing is strong and dependable articulation mechanism. It can suppress flutter problems.