Hydrodynamic Sound Source With The Structure Of Jet-Resonator For Forced Vibration Piezo Generator With Self-Adjusting Frequency Property

This thesis designs Hydrodynamic Sound Source with the structure of jet-resonator to meet the requirements of fuze power source according to the design idea of vortex induced vibration. Through the simulation and experiment, this paper studies the relationship between the inflow velocity of the jet tube, and the pressure and frequency at the bottom of resonator. The results show that: the pressure at the bottom of resonator has a linear relationship with the inflow velocity of the jet tube. With the increased inflow velocity, the incentive of the outside against the bottom of resonator rises and the pressure at the bottom of resonator also increases, and vice versa. The pressure and frequency at the bottom of resonator are comprehensively stable, which proves that this kind of sound source structure can produce stable acoustics with the self-adjusting function of frequency. Consequently, the fluid power source designed without moving parts under the principle of vortex induced vibration provides a certain reference for the study of piezoelectric energy generator harvesting from vibration induced by jet-resonator.