作者：张凤, 何康, 冯世杰, 张佳明, 王文瑞, 李泉水, 路彦珍, 刘福海, 赵飞, 王凤平
作者单位：北京科技大学, 北京 100083
关键词：红外测温;风洞;热电偶;发射率
摘要：
目前，红外测温技术在高温非稳态下的应用研究还不成熟，而红外测温技术的关键在于发射率的准确测量。为了测量高超声速气流下试件的温度，同时采用MCS640高温红外热像仪和GH3030高温合金热电偶对风洞马赫数5（Ma=5）中的超高强度合金结构钢D6AC劈尖试件进行温度测量。首先，通过热电偶和红外热像仪组合的匹配法校正试件的发射率，再设置热像仪的发射率，测得试件驻点的温度变化曲线和试件在不同时刻的热图。实验测得试件驻点的最高温度为2 019.3 ℃，对分析材料的烧蚀性能和防热结构的可靠性提供了参考。实验证明，该测温方法可以用来测量高超声速风洞中试件的温度。
Infrared temperature measurement of wedge shape specimen in the hypersonic wind tunnel at Ma = 5
ZHANG Feng, HE Kang, FENG Shijie, ZHANG Jiaming, WANG Wenrui, LI Quanshui, LU Yanzhen, LIU Fuhai, ZHAO Fei, WANG Fengping
University of Science and Technology Beijing, Beijing 100083, China
Abstract: At present, the application of infrared temperature measurement technology in the non-steady state at high temperature is not yet mature, and the key to infrared radiation temperature measurement lies in the accurate measurement of the emissivity. In order to measure the temperature of the specimen under hypersonic flow, the temperature of the wedge shape specimen of super strength alloy structural steel D6AC was measured by using the Lumasense MCS640 thermal imager and the GH3030 high temperature alloy thermocouple in the wind tunnel of Mach-number 5. Firstly, the emissivity of the specimen is corrected by the matching method of a thermocouple and an infrared thermal imager, and then the emissivity of the thermal imager is set. The temperature variation curve of the stagnation point of the specimen and the heat map of the specimen at different moments are measured. The maximum temperature of the test specimen at the stagnation point is 2019.3℃, which provides a reference for the ablation performance of the analysis material and the reliability of the heat protection structure. Experiments show that this kind of temperature measurement method can be used to measure the temperature of the specimen in the hypersonic wind tunnel.
Keywords: infrared temperature measurement;wind tunnel;thermocouple;emissivity
2019, 45(7):37-41 收稿日期: 2018-02-05;收到修改稿日期: 2018-03-16
基金项目: 国家重大科学仪器设备开发专项（2011YQ14014506，2011YQ14014507）
作者简介: 张凤(1992-),女,陕西西安市人,硕士研究生,专业方向为物理学
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