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二维光学头罩热辐射干扰饱和数值模拟

DOI: 10.11990/jheu.201405048

Keywords: 光学头罩, 气动热, 热辐射, 有限元

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Abstract:

针对光学头罩热辐射干扰饱和问题,应用有限元法模拟了飞行高度为15 km,马赫数Ma=4时不镀膜CVD ZnS光学头罩和表面镀上1 300 nm HfO2的CVD ZnS的光学头罩的温度场分布情况.根据光学头罩的温度场分布,仿真得到头罩干扰辐射强度的分布,从而对光学头罩的气动热辐射效应进行评估.模拟结果表明,不镀膜和镀膜CVD ZnS光学头罩的温度值相差不大,但是HfO2薄膜对CVD ZnS光学头罩的热辐射干扰饱和产生明显的延迟,提高了光学头罩抗热辐射效应的能力.

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