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Mitigating instability by actuating the swirler in a combustor

Gopakumar, R and Mondal, Sudeepta and Paul, Reetam and Mahesh, S and Chaudhuri, Swetaprovo (2016) Mitigating instability by actuating the swirler in a combustor. In: COMBUSTION AND FLAME, 165 . pp. 361-363.

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Official URL: http://dx.doi.org/10.1016/j.combustflame.2015.12.0...

Abstract

Thermoacoustic instability in a lean premixed combustor is a major impediment towards reliable operation of gas turbine engines for both aerospace and land based applications. In this communication, we investigate the following concept: in a laboratory combustor, could the otherwise static swirler be actuated to a rotary motion, such that the higher intensity turbulence and higher swirl number generated in the flame stabilization region might alter the flame position, structure and thereby assist in mitigating thermoacoustic instabilities? Results obtained using microphone and high speed imaging, show prominent reductions in the amplitudes of the first mode of the thermoacoustically unstable flame, with increased rotation rate of the swirler. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
Keywords: Thermoacoustic instability; Turbulent premixed flames; Swirl flows; Instability control
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Others
Date Deposited: 06 Apr 2016 07:56
Last Modified: 07 Apr 2016 06:40
URI: http://eprints.iisc.ernet.in/id/eprint/53616

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