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Large carbon cluster thin film gauges for measuring aerodynamic heat transfer rates in hypersonic shock tunnels

Srinath, S and Reddy, KPJ (2015) Large carbon cluster thin film gauges for measuring aerodynamic heat transfer rates in hypersonic shock tunnels. In: MEASUREMENT SCIENCE & TECHNOLOGY, 26 (2).

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Official URL: http://dx.doi.org/ 10.1088/0957-0233/26/2/025901

Abstract

Different types of Large Carbon Cluster (LCC) layers are synthesized by a single-step pyrolysis technique at various ratios of precursor mixture. The aim is to develop a fast responsive and stable thermal gauge based on a LCC layer which has relatively good electrical conduction in order to use it in the hypersonic flow field. The thermoelectric property of the LCC layer has been studied. It is found that these carbon clusters are sensitive to temperature changes. Therefore suitable thermal gauges were developed for blunt cone bodies and were tested in hypersonic shock tunnels at a flow Mach number of 6.8 to measure aerodynamic heating. The LCC layer of this thermal gauge encounters high shear forces and a hostile environment for test duration in the range of a millisecond. The results are favorable to use large carbon clusters as a better sensor than a conventional platinum thin film gauge in view of fast responsiveness and stability.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords: hypersonic; heat transfer measurement; thermal gauge; large carbon cluster; nanotechnology
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 28 Feb 2015 07:12
Last Modified: 28 Feb 2015 07:12
URI: http://eprints.iisc.ernet.in/id/eprint/50939

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