论文部分内容阅读
磷光热图测热技术基于磷光材料的温度敏感特性,是应用于风洞热环境测量的新型全场热流测量方法,近年来在欧美等国得到了高速发展。在中国航天空气动力技术研究院搭建了一套磷光热图系统,采用20°压缩拐角模型开展了重复性试验及铂薄膜电阻温度计对比和纹影验证试验。试验结果表明:热流测量特征区域结果与纹影照片符合良好;技术自身重复性误差小于5%;平板热流与理论值误差小于10%;与铂薄膜电阻温度计的对比误差小于20%,此误差主要由铂薄膜电阻温度计的测量散布度引起。该技术通过单次试验获得模型全场热环境数据,且能够捕获热流峰值区域,是一种全面高效的热环境测量手段。
Based on the temperature-sensitive properties of phosphorescent materials, phosphorescence thermometry is a new type of total-field heat flow measurement method used in wind tunnel thermal environment measurement. In recent years, it has been developed rapidly in Europe, the United States and other countries. In China Aerospace Aerodynamics Research Institute set up a set of phosphorescence heat mapping system, the use of 20 ° compression corner model to carry out repeatability tests and platinum thin film resistance thermometer contrast and shadow verification test. The results show that the results of the heat flux measurement are in good agreement with the smeared photographs; the repeatability error of the technique is less than 5%; the error of the plate heat flow is less than 10% with the theoretical value; the difference from the platinum film resistance thermometer is less than 20% Caused by the measurement spread of a platinum film resistance thermometer. The technology obtains the whole field thermal environment data through a single experiment and captures the heat flow peak area, which is a comprehensive and efficient thermal environment measurement method.