盖板式陶瓷热防护系统的传热性能优化

Optimization study of heat transfer properties for generic shingle ceramic thermal protection system

针对高超声速飞行器对盖板式陶瓷热防护系统的迫切需求,建立了热防护系统结构瞬态传热模型;并研究了防隔热层的物性参数,厚度尺寸,相变层的种类、位置等因素对热防护系统结构传热性能的影响。结果表明,隔热层物性参数及厚度尺寸对热防护系统结构传热性能具有决定性影响,而防热层的物性参数及厚度尺寸几乎不产生影响。相变材料的引入能够明显改善热防护系统结构的传热性能。调整和优化相变层位置是改善热防护系统结构传热性能、降低结构厚度的一个有效途径。隔热层厚度的优化结果可为热防护系统结构设计提供一定的参考和依据。

For the demand of hypersonic aircraft for generic shingle ceramic thermal protection system （TPS）,the transient heat transfer model of TPS structure was established and the influences of some factors,such as material properties,thickness,phase change materials and its location, on heat transfer properties were investigated.Results show that：material properties and thickness of heat insulation layer play a key role in heat transfer properties,while these of the heat protection layer almost exist no effect;the introduction of phase change materials obviously improves the heat transfer properties of TPS structure;the location optimization of phase change layer is an effective method to improve the heat transfer properties and reduce the thickness;the thickness optimization of heat insulation layer can provide reference for the TPS design.