摘要
温度敏感涂料(temperature-sensitive paint,TSP)可以实现高空间分辨率的温度测量.基于时间解析温度数据计算热流密度是典型的导热反问题.基于一维双层导热模型,通过解析或数值求解的方法计算热流密度,是上述问题的通用解法.在工程应用中,可根据试验工况简化一维双层导热模型,采用更简便的方法进行热流计算.TSP测量热流的精度受涂料厚度、TSP测温真实位置和材料热物性变化等因素影响,相应地可以在涂料设计、物理建模以及计算方法等方面进行完善,提高TSP热流测量的精度.TSP热流测量在暂冲式和激波式两类高超声速风洞中均已得到成功应用,文章结合两个应用实例对工程应用中的挑战与对策进行了讨论.
Temperature-sensitive paint can be used to measure the temperature field with high spatial resolution.Determination of surface heat flux based on the temperature history measured by TSP is a typical inverse heat conduction problem.The problem can be solved by analytical and numerical solutions based on a one-dimensional double-layer heat conduction model.In engineering applications,the heat conduction model can be simplified to obtain easier calculation methods.The accuracy of heat flux measurement using TSP is affected by the factors including thickness of coating,position of TSP temperature measurement and temperature dependency of thermal properties,which can be improved in paint design,physical modeling and calculation methods,correspondingly.The heat flux measurements using TSP have been successfully carried out in regular hypersonic wind tunnels and shock tunnels.In this paper,two cases were used to discuss the challenges and countermeasures in engineering applications.
作者
刘旭
彭迪
刘应征
LIU Xu;PENG Di;LIU Ying-zheng(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《气体物理》
2020年第5期1-12,共12页
Physics of Gases
基金
国家自然科学基金(11725209,11872038)。
关键词
温度敏感涂料
热流密度
导热反问题
导热模型
高超声速风洞
temperature-sensitive paint
heat flux
inverse heat conduction problem
heat conduction model
hypersonic wind tunnel
