航空学报 > 2014, Vol. 35 Issue (8): 2156-2162   doi: 10.7527/S1000-6893.2013.0504

地效对二维气动弹性特性的影响

张斌, 徐敏, 谢亮   

  1. 西北工业大学 航天学院, 陕西 西安 710072
  • 收稿日期:2013-10-16 修回日期:2013-12-23 出版日期:2014-08-25 发布日期:2014-01-20
  • 通讯作者: 徐敏,Tel.:029-88494614,E-mail:xumin@nwpu.edu.cn E-mail:xumin@nwpu.edu.cn
  • 作者简介:张斌男,硕士研究生。主要研究方向:气动弹性力学和弹性飞行器飞行力学。,E-mail:arctanx2@gmail.com;徐敏女,博士,教授,博士生导师。主要研究方向:气动弹性、多力学场耦合问题。Tel:029-88494614,E-mail:xumin@nwpu.edu.cn;谢亮男,博士研究生。主要研究方向:计算流体力学与气动弹性力学。,E-mail:jjccblws02@163.com

Influence on Two Dimensional Aeroelastic Characteristics in Ground Effect

ZHANG Bin, XU Min, XIE Liang   

  1. College of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2013-10-16 Revised:2013-12-23 Online:2014-08-25 Published:2014-01-20

摘要:

为研究地面效应对飞行器的气动弹性特性的影响,基于计算流体力学(CFD),耦合求解结构动力学方程,建立了气动弹性求解系统。通过涡诱导的圆柱自由振荡算例和Isogai的二元气动弹性算例,分别研究了地面效应对气动弹性动态响应和颤振边界的影响。研究结果表明:在地效作用下,涡街的对称性及发展受到影响,圆柱的动态响应幅值减小,频率增加,越靠近地面影响越显著;地效作用下,二维翼型在亚声速阶段的颤振速度下降,跨声速阶段,颤振边界凹坑范围扩大,颤振速度与激波位置密切相关。

关键词: 计算流体力学, 气动弹性, 地面效应, 动态响应, 颤振

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

中图分类号: