덤프 연소기에서 음향가진을 이용한 연소불안정 제어

A study on the open-loop control of a combustion instability using different hydrocarbon fuels has been experimentally investigated. Each fuel had different combustion instability characteristics under same experimental conditions. By adjusting the equivalence ratio for similar characteristic chemical time, however, instability frequencies and maximum power spectral densities had nearly same values. Control effectiveness of a combustion instability using different frequencies and amplitude of acoustic excitation was investigated. The result showed that the inlet velocity, forcing frequency and amplitude affected the control effectiveness. The similar level of suppression was achieved regardless of the fuels in the case of the characteristic chemical time was similar.