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http://dx.doi.org/10.15231/jksc.2018.23.1.013

Acoustic Coupling between Longitudinal and Transverse Modes in an Annular Gas Turbine Combustor  

Kim, Jihwan (School of Mechanical and Authomotive Engineering, Gangneung-Wonju National University)
Kim, Daesik (School of Mechanical and Authomotive Engineering, Gangneung-Wonju National University)
Publication Information
Journal of the Korean Society of Combustion / v.23, no.1, 2018 , pp. 13-20 More about this Journal
Abstract
Transverse acoustic mode in annular combustion chambers affects air-fuel mixing characteristics in the nozzle and can result in heat release fluctuations in the combustor. In addition, the acoustic mode coupling between the nozzle and the combustion chamber is one of the key parameters determining combustion instability phenomenon in the annular combustor. In this study, acoustic coupling between the nozzle and annular combustor was numerically analyzed using 3D-based in house FEM code. As a result, it was found that the acoustic mode inside the combustion chamber at anti-node locations of the transverse mode was strongly influenced by the nozzle inlet boundary conditions.
Keywords
Combustion instability; Thermoacoustic analysis; Helmholtz solver; Annular combustor;
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Times Cited By KSCI : 5  (Citation Analysis)
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