Research on acoustic characteristics of Hartmann acoustic generator

Based on the method of FW-H acoustic model,the influence of the model parameters on the acoustic characteristics of the Hartmann acoustic generator is studied,these parameters are resonator length,spacing between the jet and resonator tube,the diameter of resonator tube,and the inlet pressure.The conclusions are as follows: The total sound pressure level(SPL) increases with the increase of the length of resonator tube,while the magnitude of fundamental frequency is reverse;the total SPL oscillates with the increase of the spacing between jet and resonator,and the oscil-lating period increases with the increase of the diameter of resonator tube;the Hartmann generator with larger diameter of resonator tube can produce a higher SPL;the total SPL increases with the increase of the inlet pressure,while the fundamental frequency changes slightly.The results of the paper are significant for the application of the Hartmann acoustic generator.