Abstract
The characteristics of combustion oscillation of a silo-type 79.5 MW gas turbine combustor in commercial operation and its suppression have been investigated. The oscillation of the lean premixed gas turbine combustor resulting from the combustion instability occurred at near full load operation. An FFT analysis of the combustion dynamics showed that the dominant frequency of the oscillation would be that of the 1st longitudinal acoustic resonance mode of the combustor. To suppress the combustion oscillation, a passive control technique for reducing the combustion instability was employed; that is, the fuel to the combustor was redistributed by adjusting the operational schedule of one of six fuel control valves, which would lead the increase of the local operational equivalence ratio near the central recirculation zone of the combustor. By doing so, the oscillation was successfully reduced to the permissible level while the amount of NOx emission met proper regulatory level set by the local government.
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Recommended by Associate Editor Oh Chae Kwon
Seok Bin Seo received his B.S. degree from Seongkyunkwan University in Seoul, Korea in 1988 and M.S. in ME from Chungnam National University in Daejeon, Korea in 2001. He worked at several Korea Electric Power Co. (KEPCO) power plants until 1995 and he is currently a senior researcher at KEPRI, the Research Institute of KEPCO. His research interests include combustion instability of gas turbine for power generation. He is studying the instability of coal gas in IGCC Gas Turbine.
Dong Jin Cha received his B.S. and M.S. degrees from Hanyang University in Seoul, Korea, in 1981 and 1983, respectively. He then received his Ph.D in ME from the University of Illinois at Chicago in 1992, and worked at the US DOE NETL for the next three years as a National Research Council (NRC) Associate. Dr. Cha is currently a Professor at the Department of Building Services Engineering at Hanbat National University in Daejeon, Korea. His research interests include combustion instability of gas turbine for power generation and fluid flows in building services engineering.
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Seo, S.B., Ahn, D.H., Park, J.H. et al. Analysis of the combustion oscillation in a silo-type gas turbine combustor and its suppression. J Mech Sci Technol 26, 1235–1240 (2012). https://doi.org/10.1007/s12206-012-0205-1
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DOI: https://doi.org/10.1007/s12206-012-0205-1