Optical convective heat transfer measurements using infrared thermography and frequency domain phosphor thermometry

Optical convective heat transfer measurements using infrared thermography and frequency domain phosphor thermometry
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使用红外热成像和频域磷测温法进行光学对流传热测量

DOI:
10.1016/j.ijheatmasstransfer.2014.11.025
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发表时间:
2015
影响因子:
5.2
通讯作者:
Pfitzner
Pfitzner
中科院分区:
工程技术2区
文献类型:
--
作者:
Schreivogel;Pfitzner

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提出了一种新的空间分辨换热测量技术。利用其传输特性,测量了安装在加热铜表面上的丙烯酸酯玻璃板上下表面的温度分布。采用红外热像仪测定外壁温度。用热成像荧光粉测量了亚克力玻璃和铜基板之间的界面温度。使用高速摄像记录的频域处理方法,评估了外加Cr3+:Al_2O_3(红宝石)粉末的随温度变化的磷光寿命。测量的温度边界条件用于对电加热器施加的传导热流进行有限元计算。对传热系数分布进行迭代修正,以补偿横向导热误差。通过射流冲击换热实验对新开发的技术进行了验证,并与数值计算结果和文献数据进行了比较。
A novel technique for spatially resolved heat transfer measurements is proposed. Utilizing its transmissive properties the temperature distributions at the upper and lower surface of an acrylic glass plate mounted on a heated copper surface are measured. Infrared thermography is employed to determine the external wall temperature. The temperature at the interface between acrylic glass and copper base plate is measured with a thermographic phosphor. The temperature dependent phosphorescence lifetime of the applied Cr3+:Al2O3(ruby) powder is assessed using frequency-domain processing of high-speed camera recordings. The measured temperature boundary conditions are used to perform a finite element computation of the conductive heat flux that is imposed by an electric heater. The heat transfer coefficient distribution is corrected iteratively to compensate lateral conduction errors. The newly developed technique is validated by means of jet impingement heat transfer measurements and compared to numerical results and data available in the literature.
用于温度传感的荧光寿命的时域和频域分析
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