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针对各种复杂、极端热环境下的表面热流密度测量难题,提出了一种基于红外热成像技术的表面热流密度分布测量方法。热流测量借助贴敷在被测物体表面的特制信标,从红外热图中计算获得各项测量参数。其结合了接触式测量与非接触式测量的优点,区别于传统单点测量可以一次性完成二维覆盖测量,保证测量精度的同时适用于更广泛的工程环境,具有很大的工程及生产实践意义。研究中先后从系统构建、原理分析及数值仿真的角度入手,得到测量的理论误差小于2%,证明了基于红外热图技术的热流密度分布测量方法的可行性与正确性。
In order to solve the problem of surface heat flux density measurement in various complex and extreme thermal environments, a method of surface heat flux density distribution measurement based on infrared thermography is proposed. Heat flow measurement With the aid of a special beacon affixed to the surface of the object to be measured, various measurement parameters are calculated from the infrared heat map. It combines the advantages of contact measurement and non-contact measurement, different from the traditional single-point measurement can complete a one-time two-dimensional coverage measurement, to ensure measurement accuracy at the same time apply to a wider range of engineering environment, with great engineering and production practices significance. The theoretical error of the measurement was less than 2% from the angle of system construction, principle analysis and numerical simulation. It proves the feasibility and correctness of the heat flux density measurement method based on the infrared heat map technology.