摘要
采用内置高温热管进行热防护是一种新型高效热防护技术。该文首先给出了内置高温热管热防护结构的工作原理,建立了其结构模型温度场的计算方法,并对典型工况下的结构模型进行了温度场分析,进而研究了弦向热管失效对结构温度场的影响,同时对影响温度场和热防护效果的主要结构参数进行了计算分析。研究结果表明:采用稳态分析方法对结构进行设计计算和安全性评估是偏于安全的;机翼展向的热管不仅能极大地提高热防护的效果而且可以提高结构的可靠性;另外影响热防护效果最关键的参数是驻点与高温热管之间的最小距离。
Heat pipe cooling for thermal protection structure is a promising approach for cooling during hypersonic flight.This paper describes the principles of the heat pipe cooled thermal protection structure（TPS）.A computational method was used to predict the temperature field to evaluate the effect of the failure of the chordwise heat pipe and the effect of other structural parameters.The results show that the steady-state analysis is more conservative than the transient analysis for safety evaluation and that the spanwise heat pipe not only increases the system effectiveness but also improves the structural reliability.The most important parameter affecting of the system is the shortest distance between the heat pipe and the stagnation point.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第7期1094-1098,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(10872104)
关键词
热防护
高温热管
相变
高超音速
thermal protection
high temperature heat pipe
phase change
hypersonic flight
