长时间隔热材料环境的稳态热流测量方法  

Steady-State Heat-Flux Measurement Method for Environment of Long-Time Insulation Materials

作　　者：涂建强[1] 刘德英[1] 陈海群[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《宇航材料工艺》2008年第2期76-80,共5页Aerospace Materials & Technology

摘　　要：介绍并研究了一种基于一维稳态热传导原理的三段稳态塞式量热计。该量热计通过测量探芯中间康铜段前、后表面上的温差来得到壁面热流密度。适合稳态、低热流状态下,驻点及大面积区长时间隔热材料上的多点测量。首先从理论上分析了三段稳态塞式量热计的稳态热流测量原理;然后采用超声速矩形湍流导管试验技术,利用等离子电弧加热器进行了表面热流测量试验。结果表明:在包含来流参数约±4%的系统误差情况下,三段稳态塞式量热计的测量重复性偏差为±7.6%,经误差分析得到该量热计的热流测量精度在5%以内。The three-segment steady-state plug-type calorimeter based on one-dimension heat transfer principle was introduced and in the paper. The wall-heat-flux was obtained by measuring temperature difference between the fore-and-aft surfaces of constantan segment. The calorimeter is suitable for long-time multi-point measurement of stagnation-point and local heat flux in the same big area of insulation material in steady-state and low-heat-flux. Firstly, the heat-flux measurement principle of the three-segment steady-state plug-type calorimeter was analyzed theoretically. Then, the supersonic rectangle turbulent duct technique and arc heater are used to measure the wall-heat-flux. The result indicates that including the flow parameters varying within about 4% ,the heat-flux repetition deviation of the calorimeter is 7.6%. The error analysis result shows that the relative deviation of the calorimeter is less than 5%.

关 键 词：隔热材料 稳态热流测量技术 气动热试验 电弧加热器 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程] TB330.3[一般工业技术—材料科学与工程]