地效对二维气动弹性特性的影响

doi:10.7527/S1000-6893.2013.0504

Abstract

Abstract:

To study the influence of ground effect on the aeroelastic characteristics of an aircraft, an aeroelastic solver coupling with computational fluid dynamics (CFD) and a structural dynamics solver is developed. Then the influences of ground effect on aeroelastic dynamic response and flutter boundary are investigated through a vortex-induced oscillating cylinder and Isogai's two dimensional aeroelastic cases. The results indicate that, in ground effect, the symmetry and development of the vortex street is constrained, thus the dynamic response amplitude of the cylinder decreases and the frequency increases. The ground effect is greater as the models move near the ground. In ground effect, the flutter speed of the airfoil decreases in the subsonic region; In transonic region, the dip is enlarged and the flutter velocity is closely related with the position of shock waves.

Key words: computational fluid dynamics, aeroelasticity, ground effect, dynamic response, flutter

CLC Number:

V211.47

ZHANG Bin, XU Min, XIE Liang. Influence on Two Dimensional Aeroelastic Characteristics in Ground Effect[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(8): 2156-2162.

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Influence on Two Dimensional Aeroelastic Characteristics in Ground Effect

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