气动热环境下高速飞行器光学头罩特性分析

范志刚, 肖昊苏, 高豫强

范志刚, 肖昊苏, 高豫强. 气动热环境下高速飞行器光学头罩特性分析[J]. 应用光学, 2009, 30(3): 361-365.
引用本文: 范志刚, 肖昊苏, 高豫强. 气动热环境下高速飞行器光学头罩特性分析[J]. 应用光学, 2009, 30(3): 361-365.
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FAN Zhi-gang, XIAO Hao-su, GAO Yu-qiang. Characteristics analysis of high-speed aerocraft optical dome in aerodynamic heating environment[J]. Journal of Applied Optics, 2009, 30(3): 361-365.
Citation: FAN Zhi-gang, XIAO Hao-su, GAO Yu-qiang. Characteristics analysis of high-speed aerocraft optical dome in aerodynamic heating environment[J]. Journal of Applied Optics, 2009, 30(3): 361-365.
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气动热环境下高速飞行器光学头罩特性分析

  • 1.

    哈尔滨工业大学空间光学工程研究中心,黑龙江哈尔滨150001;

  • 2.

    中国空空导弹研究院,河南洛阳471009

详细信息

  • 中图分类号: TN206;O435.1

Characteristics analysis of high-speed aerocraft optical dome in aerodynamic heating environment

  • 1.

    Research Centre for Space Optical Engineering,Harbin Institute of Technology,Harbin 150001,China;

  • 2.

    China Airborne Missile Academy,Luoyang 471009,China

摘要

    摘要
  • 摘要: 建立高速飞行器红外光学头罩在气动热环境下有限元分析模型，分析头罩在气动热环境下的物理特性和光学特性，对头罩在气动热环境下的温度场、应力场、应变场和位移场进行数值计算。计算结果表明头罩在气动热环境下温度场分布不均匀，因此头罩会产生热应力而发生形变。利用有限元分析结果，根据热光效应和弹光效应理论，对气动热环境下红外光学头罩的折射率场进行数值计算。以头罩外表面中心点折射率为例，在头罩工作时间内，通过计算得到头罩15s后由热光效应造成的折射率改变为0.011，而由弹光效应造成的x方向折射率改变为0.000107，即弹光效应造成的折射率改变量约为热光效应造成折射率改变量的0.97%，由此可知，在气动热环境下热光效应对头罩折射率的影响比较大，而弹光效应对头罩折射率的影响比较小。
    Abstract: A finite element model of the high-speed aerocraft infrared optical dome in the aerodynamic heating environment was established to analyze the domes physical and optical properties. The temperature filed, stress field, strain field and displacement field of the dome in the aerodynamic heating environment were computed numerically. The calculated results show that the temperature distribution of the dome in aerodynamic heating environment is non-uniform and thus the dome is deformable due to its thermal stress. Based on the theories of thermo-optical effect and elasticoptical effect, the refractive index field of the dome was numerically computed with the result of the finite element analysis. Taking the refractive index of the central point in the domes outer surface as an example, the refractive index variation caused by thermo-optical effect is 0.011 while the xdirection refractive index variation caused by elastic-optical effect is 0.000107. That is, the refractive index variation caused by elastic-optical effect is only 0.97% in the amount of the refractive index variation caused the thermo-optical effect during the domes working time. Therefore, thermo-optical effect has greater influence on the refractive index variation of the dome than elastic-optical effect.
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  • 刊出日期:  2009-05-09

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