金属热防护系统多层隔热材料的稳态传热分析

基金项目: 国家自然科学基金资助(9040501690205034)

Steady heat transfer analysis of multilayer thermal insulations for metallic thermal protection system

Research Center of Composite Materials, Harbin Institute of Technology, Harbin 150080, China

摘要: 采用能量平衡方程和两热流密度近似法建立了金属热防护系统多层隔热材料的稳态传热的数学模型,并利用测量多层隔热材料单元的有效导热系数的实验和遗传算法对纤维隔热材料的辐射衰减系数和隔热屏表面辐射发射系数这两个热物参数进行了优化,最后用实验测得的多层隔热材料的有效导热系数验证了采用优化后参数的多层隔热材料的稳态传热模型的正确性。
- 航空、航天推进系统 /
- 金属热防护系统 /
- 稳态传热 /
- 多层隔热材料 /
- 遗传算法 /
- 优化
Abstract: Combined energy equilibrium equation and two thermal flux approximation methods were used to establish the steady heat transfer mathematic model of the multi-layer thermal insulations in the metallic protection system.Radiation attenuation index of fibrous thermal insulations and emissivity of heat insulation screen were optimized by genetic algorithm and experiment that measured the effective conductivity of the multilayer thermal insulation element.The experimentally measured effective conductivity data of the multi-layer thermal insulations validate steady heat transfer model of the multi-layer thermal insulations,which adopt optimized thermal physical parameters.
- aerospace propulsion system /
- metallic thermal protection system /
- steady heat transfer /
- multilayer thermal insulation /

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