화염전달함수의 위상차를 이용한 시간지연 분석

• Published in: 한국분무공학회지 Vol. 21; no. 2; pp. 104 - 110
• Main Authors: 표영민, Yeongmin Pyo, 김지환, Jihwan Kim, 김대식, Daesik Kim
• Format: Journal Article
• Language: Korean
• Published: 한국분무공학회 30.06.2016; 한국액체미립화학회
• Subjects: Combustion instability(연소불안정); Computational fluid dynamic(전산유체역학); Flame transfer function(화염전달함수); Time lag analysis(시간지연분석); 기계공학
• ISSN: 1226-2277; 2288-9051

Main purpose of the current paper is to show results of time lag analysis using phase information of flame transfer function in order to predict combustion instabilities in a gas turbine combustor. The flame transfer function (FTF) is modeled using a commercial Computational Fluid Dynamics (CFD) code (Fluent). Comparisons of the modeled flame shapes with the measured ones were made using the optimized heat transfer conditions and combustion models. The FTF modeling results show a quite good agreement with the measurement data in predicting the phase delay (i.e. time lag). Time lag analysis results using the phase of FTF shows better combustion instability prediction accuracy than using time lag calculated from the steady state flame length.