Abstract

The temperature gauge with quick response characteristic and ability to provide highly precise instantaneous temperature data is usually selected for the systems with minimal time available for the measurement. Thin-film gauges are best suited for such transient measurement. In this paper, the convective environment created by blower-heater arrangement is used to evaluate the dynamic response of platinum thin-film as a heat flux gauge. The in-house fabrication of the gauge is made by using quartz as a substrate and a thin-film of pure platinum acting as a sensing element. The response is measured to the step changes for the enforced convective heat flux. The heat flux value is inferred from transient temperature data from one-dimensional heat conduction model subjected to a semi-infinite body. Numerical analysis is also performed. The similarities of experimental and numerical results authenticate the experimental set up as well as the thin film gauge efficacy.

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