发布时间：2025-04-30

论文名称：Ceiling effects on the aerodynamics of a flapping wing at hovering condition

发表刊物：Physics of Fluids

摘要：The ceiling effect on the aerodynamics of hovering flapping wing is investigated by solving the three-dimensional incompressible Navier-Stokes equations. Computations have been carried out for some parameters including the distance between the wing and the ceiling, the Reynolds number, and the stroke amplitude. The ceiling effect on the force production and vortical structures around the wing is analyzed. It is shown that the ceiling effect is to increase the aerodynamic forces. This improvement in force production in ceiling effect is caused by the increments both in the relative velocity of coming flow and the effective angle of attack of the wing. The underlying mechanism is that the presence of the ceiling acts as a mirror as if there exists a mirroring leading-edge vortex (LEV). This mirroring LEV not only increases the relative velocity of the coming flow ahead of the wing but also produces an up-wash to the coming flow, hence increasing the effective angle of attack of the wing.

合写作者：Xueguang Meng

卷号：31,051905

是否译文：否

发表时间：2019-04-29