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力学与实践 ›› 2011, Vol. 33 ›› Issue (2): 18-23.doi: 10.6052/1000-0879-lxysj2010-411

• 应用研究 • 上一篇    下一篇

曲率半径对前缘气动热与结构响应的影响

彭志琦1,张均锋2,牛斌3,穆丹3   

  1. 1. 中科院力学所工程科学部
    2. 北京北四环西路15号中科院力学所工程科学部
    3.
  • 收稿日期:2010-10-11 修回日期:2011-01-03 出版日期:2011-04-15 发布日期:2011-04-19
  • 通讯作者: 张均锋 E-mail:zhangjf@imech.ac.cn

INFLUENCES OF CURVATURE RADIUS OF LEADING EDGE ON AERODYNAMIC HEATING AND STRUCTURAL RESPONSE

  • Received:2010-10-11 Revised:2011-01-03 Online:2011-04-15 Published:2011-04-19
  • Contact: Zhang Junfeng E-mail:zhangjf@imech.ac.cn

摘要: 针对高超声速飞行器铌合金前缘结构, 研究了不同曲率半径对前缘结构 温度场、应力场和变形场的影响. 首先建立高超声速气动加热模型, 采用有限体积法得到热 环境参数, 并运用有限元法计算结构的温度、应力和变形. 结果表明: 不同时间的温度场分 布和曲率半径密切相关, 温升过程中应力最大值出现在曲率半径为1\,mm时; 随时间推移, 曲 率半径越大应力越低; 而位移随曲率半径的增加而增大.

关键词: 前缘、高超声速、曲率半径、气动热

Abstract: Influences of the curvature radius of the hypersonic leading edge on the evolution of temperature, stress, and deformation are studied in this paper. Firstly, the hypersonic aerodynamic heating model is established to determine the thermal environment of the leading edge made of niobium alloy by the finite volume method. Secondly, the temperature field, stress field, and deformation field of the leading edge with their evolution are obtained by the finite element method. The numerical results reveal that the evolution of the temperature field is closely related to the curvature radius. The stress value of the leading edge during the aerodynamic heating process reaches the maximum when the curvature radius is 1\,mm; the displacement increases with the increase of the curvature radius.

Key words: leading edge, hypersonic, curvature radius, aerodynamic heating