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壁温变化非定常气动加热机理研究

陈皓 鲍麟

陈皓, 鲍麟. 壁温变化非定常气动加热机理研究[J]. 应用数学和力学, 2009, 30(2): 160-170.
引用本文: 陈皓, 鲍麟. 壁温变化非定常气动加热机理研究[J]. 应用数学和力学, 2009, 30(2): 160-170.
CHEN Hao, BAO Lin. Mechanism of Unsteady Aerodynamic Heating With a Sudden Change in Surface Temperature[J]. Applied Mathematics and Mechanics, 2009, 30(2): 160-170.
Citation: CHEN Hao, BAO Lin. Mechanism of Unsteady Aerodynamic Heating With a Sudden Change in Surface Temperature[J]. Applied Mathematics and Mechanics, 2009, 30(2): 160-170.

壁温变化非定常气动加热机理研究

基金项目: 国家自然科学基金资助项目(90716011)
详细信息
    作者简介:

    陈皓(1984- ),男,安徽含山人,博士生;鲍麟(联系人.Tel:+86-10-88256133).

  • 中图分类号: O354.4

Mechanism of Unsteady Aerodynamic Heating With a Sudden Change in Surface Temperature

  • 摘要: 研究了高超声速平板边界层因壁温时变引发的非定常气动热环境特征及机理.通过近似解析和数值模拟两种手段,得到了壁面热流随时间变化的完整过程.解析手段求解非定常可压缩边界层方程,将非定常响应表达成稳态解加上摄动级数的形式,在初始和最终稳态邻域分别求解,在适当的位置进行拼接,从而得到整个时间域上的解.在满足解析解假设的区域,数值结果与解析结果吻合较好,证明了所使用方法的可靠性.结果表明,非定常响应有两点显著特征:在壁温突然增加后短时间内,壁面热流方向改变,热边界层剖面在壁面附近出现了另一个拐点,这种新的剖面形状是典型的非定常特征.但是,高超声速情况下此种非定常响应存在的时间却很短,在考虑长时间气动加热的情况下,若只存在壁面温度时变的诱因,可以忽略流动中的非定常过程,当作准定常情况来处理.
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出版历程
  • 收稿日期:  2008-12-04
  • 修回日期:  2008-12-14
  • 刊出日期:  2009-02-15

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