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C/C复合材料板烧蚀中热传导的非线性分析

, PP. 49-53

Keywords: 烧蚀,C/C复合材料,热传导,非线性

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Abstract:

在高压高热流作用下,高马赫数飞行器防热层常用耐高温的C/C复合材料出现烧蚀现象。考虑到C/C复合材料的高温导热系数为温度的函数,基于傅里叶传热定律和高温烧蚀机制,利用FORTRAN语言编程计算分析了C/C复合材料板烧蚀中热传导特性。结果表明:较低热流入射时,物体表面温度变化速率与内部的不同;随时间的推移,受热表面的温度趋于一致,而背面温度相差较大;物体内部温度分布趋势大体相同。较高热流入射时,表面出现烧蚀现象,温度急速升高,并维持在某一温度值保持动态平衡。

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