Conduction based calibration of handmade platinum thin film heat transfer gauges for transient measurements

Rakesh Kumar; Niranjan Sahoo; Vinayak Kulkarni

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Conduction based calibration of handmade platinum thin film heat transfer gauges for transient measurements

机译：基于传导的手工铂薄膜传热计校准，用于瞬态测量

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Heat transfer measurement using thin film gauges (TFG) is the most prevalently used technique for determination of surface heat flux. They are best suited for short duration transient surface temperature measurements and typically used in the applications where convection is a dominant mode of heat transfer such as gas turbine engines, high speed flights etc. However, in few interdisciplinary research areas, there are practical issues and difficulties in exposing the gauges for convection based measurements. These present investigations are aimed at exploring the possibility of using thin film gauges for short duration conduction based transient measurements with pure conduction mode of heat transfer. A simple calibration set-up has been used to supply known heat flux of different magnitudes to the thin film gauges that are fabricated in-house with platinum as sensing element and pyrex as an insulating substrate. Experimentally recorded temperature signals from the gauges are compared with simulated temperature histories obtained through finite element analysis. Convoluted integral of one-dimensional heat conduction equation is used to predict the surface heat flux and compared with input heat loads. The presently developed calibration setup is seen to be very useful for conduction based measurements of thin film gauges.

机译：使用薄膜仪表（TFG）进行热传递测量是确定表面热通量最常用的技术。它们最适合短时瞬态表面温度测量，通常用于对流是传热的主要方式的应用中，例如燃气轮机，高速飞行等。但是，在很少的跨学科研究领域中，存在实际问题和难以暴露用于对流测量的量规。这些当前的研究旨在探索使用薄膜液位计进行短时基于传导的瞬态测量以及热传导的纯传导模式的可能性。一个简单的校准装置已被用来向内部以铂作为传感元件和派热克斯玻璃作为绝缘基板制造的薄膜仪表提供不同幅度的已知热通量。将来自仪表的实验记录的温度信号与通过有限元分析获得的模拟温度历史进行比较。使用一维热传导方程的卷积积分来预测表面热通量，并将其与输入热负荷进行比较。可以看出，目前开发的校准装置对于基于薄膜厚度计的传导测量非常有用。

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来源
《International Journal of Heat and Mass Transfer》 |2012年第10期|p.2707-2713|共7页
作者
Rakesh Kumar; Niranjan Sahoo; Vinayak Kulkarni;
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作者单位

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, India;

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, India;

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
platinum thin film gauge; conduction heat flux; calibration; temperature coefficient of resistance;

机译：铂薄膜计传导热通量校准电阻温度系数;

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Conduction based calibration of handmade platinum thin film heat transfer gauges for transient measurements

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