Abstract
In this paper, combustion instability in a reverse-flow gas turbine combustor was analyzed using a 1D network model. Two different approaches of flame transfer functions were considered; one is a classical n-τ model and the other is a modified model considering the time delay distribution. As a result of constructing a network model by rearranging acoustic elements in the flow direction, the analysis results of frequency and mode distribution similar to the measurement were obtained. In addition, the feedback instability prediction results considering the time delay distribution have shown modeling results closer to the experiment compared to the classical n-τ model.
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