脉冲爆轰发动机噪声近场和远场传播研究

his paper describes a numerical calculation method to study the propagation characteristics of the pulse detonation engine noise. Calculated pulse detonation engine nozzle static pressure, total pressure and total temperature curve over time by the CE / SE method.Calculated the pulse detonation engine pressure distribution in the near-field region by the use of large-eddy simulation . Predicted the relationship of the far-field sound pressure in the axis direction with the axial distance,and the radiation directivity pattern of pulse detonation engine noise.Found that the sound pressure decay rapid before the reference radius,decay slowly outside of the reference radius; the sound pressure has directivity.All of the simulation results provide an important reference value for research of the formation and control method in pulse detonation engine noise.