针对高速飞行器典型红外窗口材料及气动加热外部热环境特点，建立红外窗口辐射导热耦合换热模型，采用光线跟踪法及有限差分法研究了红外窗口内部温度分布。考察了材料的物性、热边界条件等因素对温度分布的影响。研究结果表明，壁面对流换热系数、光谱吸收系数对红外窗口内部温度分布影响很大。
According to typical infrared window materials characters of high-speed aircrafts and thermal environment of aerodynamic heating, a model of coupled heat transfer of radiation and conduction on infrared window was established. Ray tracing method and finite difference method were used to study internal temperature distribution of infrared window. The effects of material properties and thermal boundary condition on temperature distribution were studied. The results show that wall heat transfer coefficient and spectral absorption coefficient have a great influence on the inside temperature distribution of infrared window.
参考文献
| [1] | 纪世华.军用光电设备红外窗口技术及发展[J].应用光学,1996(02):8-14. |
| [2] | 黄勇 .梯度折射率半透明介质内热辐射传递研究[D].哈尔滨工业大学,2002. |
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