FDF-based analysis of nonlinear combustion instability in the lean premixed combustor

FDF를 이용한 메탄 희박 예혼합 연소기의 비선형 열음향학적 불안정성 해석

In the present approach, the flame-acoustics interaction is represented by FDF (Flame Describing Function) which is a important source term in the Helmholtz' equation. In this study, the combustion instability is analyzed by the forced mode strategy with the measured FDF. Numerical results indicate that the present approach reasonably well predicts the essential features of the combustion instability characteristics in the lean premixed combustor under the gas-turbine like environment.