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Jihwan Ahn,Geonryul Lee,Keeman Lee 한국연소학회 2021 KOSCOSYMPOSIUM논문집 Vol.2021 No.11
In this study, the combustion instability characteristics of low swirl model gas turbine combustor was investigated. In addition, Flame transfer function(FTF) measurements performed to develop low swirl combustor combustion instabilities prediction tool. For more accurate prediction, wide range of combustor length and forcing frequency condition were investigated. Also l-D numerical analysis were performed, and numerical data were compared to experimental data. Numerical analysis conducted by open-source code OSCILOS. According to analysis experimental data, several flame models were derived and used for numerical analysis. From the results, eigenfrequency and growth rate were inferred, and multiple instability models can be prediction. Numerical prediction unstable regime is not exactly correct for experimental results. Nevertheless, the numerical prediction data were considered reliable.