In order to explore the characteristics of combustion instability and develop effective control methods,the combustion instability phenomenon,which happens in lean premixed combustion,was investigated. In the numerical simulation, the effects of equivalent ratio, swirl number, and initial temperature of premixed gas on instability combustion were emphasized,and the perforated liners were used in the control of combustion instability. Research results show that the pressure oscillation mode is radial self-ex...