基于蒙特卡罗法的C/SiC波纹点阵结构传热性能分析

杜洋; 杨帆; 王威龙; 刘嘉豪; 杨烁冉; 赵晋芳

doi:10.3969/j.issn.2095-1248.2025.02.006

沈阳航空航天大学学报 ›› 2025, Vol. 42 ›› Issue (2) : 44 -51. DOI: 10.3969/j.issn.2095-1248.2025.02.006

机械与材料工程

基于蒙特卡罗法的C/SiC波纹点阵结构传热性能分析

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Analysis of heat transfer performance of C/SiC corrugated lattice structure based on Monte Carlo method

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摘要

为系统了解C/SiC材料的传热机理，以 C/SiC波纹点阵结构复合材料为研究对象，基于蒙特卡罗法对波纹点阵结构进行传热性能的理论分析。考虑能束发射位置、发射方向、遮挡判定这3个因素建立了波纹点阵结构的传热理论模型，分析了结构几何参数、固体发射率及外载施加温度对波纹点阵结构传热性能的影响。结合蒙特卡罗法预测了C/SiC波纹点阵结构的热传递系数，样本数量精确到4.0×10⁶，热传递系数收敛趋于0.554 9 $W / (m ⋅ K)$ 。结果表明，芯子高度、宽度和倾斜角度对热传递系数的影响都呈正相关，而芯子厚度对热传递系数的影响呈负相关；热传递系数随着固体发射率和上面板所受温度载荷的增加而增加，且增加的趋势越来越大；对航空航天复合材料隔热性能研究具有一定的工程应用价值。

Abstract

In order to gain a theoretical understanding of the heat transfer mechanism of C/SiC materials，Monte Carlo method was applied to analyze heat transfer of C/SiC corrugated lattice structure composite material.The heat transfer mechanism of the corrugated lattice structure was studied from three aspects： the beam emission position，the beam emission direction and the judgment of the beam occlusion.At the same time，the influencing factors of the heat transfer coefficient of the lattice structure were studied by changing the structural geometric parameters，the emissivity of the solid surface and the temperature applied by the upper panel.The number of samples can be accurate to 4.0×10⁶ and the heat transfer coefficient converges to 0.554 9 $W / (m ⋅ K)$ by using the heat transfer coefficient derived from the formula of Monte Carlo method.The results show that，the linear relationship between the heat transfer coefficient，the geometric parameters of the corrugated lattice and the reasons for its change are given，the optimal thermal insulation model parameters of the corrugated lattice structure are obtained.The theoretical research provides certain engineering application value for thermal insulation of aerospace material and composite material research.