一种金属蜂窝热物理参数等效方法  

作　　者：黄太誉[1] 弓云昭[1] 

机构地区：[1]中国飞机强度研究所

出　　处：《科技创新与应用》2020年第3期124-125,127,共3页Technology Innovation and Application

摘　　要：对于金属蜂窝结构而言,选择合理的建模方法是预测其传热特性效率和精度的关键。引入等效原理,对芯材的热物理特性等效方法进行了研究。根据钛合金芯材和空腔的体积占比,计算了芯材等效材料的密度和比热,在导热系数的等效过程中,不仅对芯材和空气的导热特性进行了等效和转换,还对辐射的影响进行了量化。采用这种等效方法,可以建立由两层壳元面板和体元夹芯构成的金属蜂窝等效模型,该模型可以在较小的计算规模下以较高的计算效率实现金属蜂窝结构热物理特性的准确预测,在大型热防护结构的整体传热分析中具有较强的应用价值。For the metal honeycomb sandwich structure, the key to predict the heat transfer efficiency and accuracy is to choose a reasonable modeling method. The equivalent principle is introduced to study the equivalent method of thermo physical properties of core materials. According to the volume proportion of titanium alloy core and cavity, the density and specific heat of core equivalent material are calculated. In the process of thermal conductivity equivalence, not only the thermal conductivity of core material and air is equivalent and transformed, but also the radiation effect is quantified. By using this method, an equivalent model of metal honeycomb composed of two-layer shell element panel and body element sandwich can be established. The model can accurately predict the thermal physical properties of metal honeycomb sandwich structure with high calculation efficiency in a small calculation scale,and has a strong application value in the overall heat transfer analysis of large thermal protection structure.

关 键 词：金属热防护系统 蜂窝夹心结构 等效物性参数 

分 类 号：V214.19[航空宇航科学与技术—航空宇航推进理论与工程]