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Date of Publication:2022-10-06

Journal:Flight Dynamics

Volume:39

Issue:1

Page Number:18-22

ISSN No.:1002-0853

Key Words:"carrier-based aircraft; folding wings; aerodynamic characteristics; CFD; discretization"

CN No.:61-1172/V

Abstract:Folding wing is the key technology to match carrier-based aircraft with aircraft carrier.Research on the aerodynamic characteristics of folding wings is of great significance to the flight dynamics and safety of carrier-based aircraft.Based on the idea of discretization,the folding wing was modeled,and numerical calculation was analyzed by using the computational fluid dynamics CAE software Fluent,and the aerodynamic characteristics of folding wings were analyzed according to the lift coefficient and drag coefficient change and pressure distribution.The results show that when the folding angle is 75°,the lift coefficient and lateral force coefficient of the outer wing reach the maximum,and the drag coefficient is the smallest.Once the folding mechanism fails,the folding of the outer wing causes the overall lift coefficient and drag coefficient of the wing to drop significantly,and the aerodynamic characteristics are degraded.Compared with the folding mechanism before failure,the stalling angle of attack of the wing after folding becomes smaller,and the lift coefficient tends to rise slowly after the stall.

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