【摘要】 建立金属热防护系统(MTPS)单元间的缝隙换热计算模型,基于数值计算对影响缝隙内部辐射换热强度的若干参数进行参数影响分析。研究结果表明:减小缝隙宽度和辐射率、提高缝隙底部组件材料的热扩散率以及设计合理的缝隙几何形状,可以实现缝隙内部辐射换热最大程度的弱化;当缝隙顶部温度低于673 K时,可以基本不考虑MTPS单元间的缝隙辐射换热。更多还原

【Abstract】 In this paper,gap heat computational model of metallic thermal protection system(MTPS) is established.Numerical analysis is carried out to evaluate the influence number of parameters on gap heat.The results show that gap heat can be reduced at maximum through decreaing the gap width and emissivity,improving thermal diffusivity of material at the bottom of gap,and designing reasonable gap geometry.Gap heat of MTPS can be ignored when the temperature at the top of gap is lower than 673K.更多还原