热冲击载荷下一种热防护结构隔热性能试验研究  

Experimental Study on Thermal Insulation Performance of a Thermal Protection Structure under Thermal Shock Load

作　　者：赵旭升 张肖肖[1] 杨志斌[1] 丛琳华 Zhao Xusheng;Zhang Xiaoxiao;Yang Zhibin;Cong Linhua(Aircraft Strength Research Institute of China,Xi′an 710065,Shaanxi,China)

机构地区：[1]中国飞机强度研究所,陕西西安710065

出　　处：《工程与试验》2021年第2期53-55,89,共4页Engineering and Test

摘　　要：介绍了一种防热结构的热冲击试验方法,探讨了封闭腔热试验的合理性,给出了热试验过程中的具体操作过程,获得了真实可靠的试验数据。试验结果表明,空气夹层对于提升热防护结构的隔热效果显著,且空气层厚度与结构底板温升的降低成正比例关系。热防护结构表面热载荷越严酷,单位厚度的空气层对结构底板的温升抑制越显著。底板厚度越大,单位空气层厚度对于其温升的抑制越低。该规律可以为高效热防护结构的设计提供试验依据。In this paper,a thermal shock test method of thermal protection structures is introduced.The rationality of closed cavity thermal test is discussed.The specific operation process in the test is given,and the real and reliable test data are obtained.The test results show that air interlayer can effectively promote thermal insulation performance of thermal protection structure.The thickness of air interlayer is proportional to the decrease of the temperature rise of the bottom plate.The more severe the thermal load of the structure surface suffers,the more significant the inhibition of the bottom plate temperature rise by unit thickness air interlayer is.The influence of bottom plate temperature rise by unit thickness air interlayer declines with increasing bottom plate thickness.This rule can provide experimental basis for the design of efficient thermal protection structures.

关 键 词：空气夹层 热冲击试验 热防护结构 隔热性能 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程]