摘要
对防热系统的蜂窝夹芯结构,采用全灰体假设同时考虑热传导和热辐射两种传热形式对温度场的耦合作用,利用稳态时热流量守恒建立了蜂窝芯层温度场的非线性积分方程。离散化后利用数值方法得到方程组的数值解,计算结果与美国兰利研究中心的实验结果吻合得较好。利用计算结果,讨论了下面板、柱体层的灰度、蜂窝结构长径比对结构温度场的影响。
A theoretical model of honeycore structures in a metal thermal protection system is developed, which is on the base of grey body theory. The nonlinear integral equation for steady heat transfer is established by assumption of radiation and conduction coupling. The solution of equation is obtained by numerical calculation. It is shown that result of the model is agreed with test dates of NASA Langley Research Center. Finally the influences of underside panel, gray scale of cylinder layer and length/diameter ratio of honeycomb structure on temperature of the structure were discussed.
出处
《强度与环境》
2008年第4期31-36,共6页
Structure & Environment Engineering
基金
国防基础科研项目
北航"蓝天科研新星"计划
关键词
MTPS
蜂窝夹芯结构
温度场
全灰体
灰度
MTPS
honeycore structures
temperature
whole grey body
emissivity
