The flow and combustion characteristics of three typical kinds of Self excited Oscillating jet Burners of sudden expansion chamber with noncircular inlet were conducted by numerical modeling and combustion experiments, the results show that the flame of Self excited Oscilating jet Burners has much higher diffusion rate and larger flue gas entrainment rate than the traditional jet burner. Compared with the Self excited Oscillating jet Burners of sudden expansion chamber with diamond inlet and Wang zi inlet, the jet flow from the burner of sudden expansion chamber with triangular inlet has a superior mixing capability and greater turbulence intensity. It also has the best temperature uniformity. The results also show that under the condition of the same area of inlet chamber, there is no simple monotonic function relationship between combustion characteristics (turbulent kinetic energy, flame length, temperature field, etc.) and the perimeter of cavity cross section.
