Lean premixed combustion system has been used to meet strengthened NOx emission regulations. However, it can be easily affected by combustion instability. This paper introduces a FEM(Finite Element Method)-based Helmholtz solver developed to predict n...
Lean premixed combustion system has been used to meet strengthened NOx emission regulations. However, it can be easily affected by combustion instability. This paper introduces a FEM(Finite Element Method)-based Helmholtz solver developed to predict numerically longitudinal combustion instability. The results such as complex valued eigenfrequency and acoustic pressure field can predict resonant frequency, growth rate and modal shape for acoustic modes.