An experimental study of a radially arranged thin-film heat-flux gauge

An experimental study of a radially arranged thin-film heat-flux gauge

A new thin-film heat-flux gauge was designed and fabricated on three different substrate materials. Forty pairs of Pt-Pt/10% Rh thermocouple junctions were deposited in a circular pattern on the same plane of the substrate. Over the thermocouples, 5 and 10 micron thick thermal resistance layers were...

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Veröffentlicht in:Measurement science & technology 1997-07, Vol.8 (7), p.721-727
Hauptverfasser: Cho, Christopher S K, Fralick, Gustave C, Bhatt, Hemanshu D
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Sprache:eng
Schlagworte:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Instrumentation And Photography
Metering, regulation, automation in energy
Theoretical studies. Data and constants. Metering
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container_end_page 727
container_issue 7
container_start_page 721
container_title Measurement science & technology
container_volume 8
creator Cho, Christopher S K
Fralick, Gustave C
Bhatt, Hemanshu D
description A new thin-film heat-flux gauge was designed and fabricated on three different substrate materials. Forty pairs of Pt-Pt/10% Rh thermocouple junctions were deposited in a circular pattern on the same plane of the substrate. Over the thermocouples, 5 and 10 micron thick thermal resistance layers were deposited to create a temperature gradient across those layers. Calibration and testing of these gauges were carried out in an arc-lamp calibration facility. The heat flux calculated from the gauge output is in good agreement with the value obtained from the pre-calibrated standard sensor. A CO2 laser was also used to test the steady-state and dynamic responses of the heat-flux gauge. During the steady-state test, the time constant for the heating period was 30 s. The frequency response of the heat-flux gauge was measured in the frequency domain using a CO2 laser and a chopper. The responses from an infrared detector and the heat-flux gauge were measured simultaneously and compared. It was found that the thin-film heat-flux gauge has a dynamic frequency response of 3 kHz.
doi_str_mv 10.1088/0957-0233/8/7/005
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source IOP Publishing Journals; NASA Technical Reports Server; Institute of Physics (IOP) Journals - HEAL-Link
subjects Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Instrumentation And Photography
Metering, regulation, automation in energy
Theoretical studies. Data and constants. Metering
title An experimental study of a radially arranged thin-film heat-flux gauge
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