Rotary Flow Bubble Noise Characteristics

This paper attentatively studies the theory of traveling bubble cavitation noise emitted from high-speed underwater self-navigator of Schiebe body. Firstly it discusses the value, meaning, background and method of this topic. Then it deducts the single-bubble sound pressure, spectrum of sound pressure, power spectrum. According to the real situation of traveling bubble cavitation noise around a Schiebe body, the mathematical model of single-bubble collapse is selected, furthermore, the mathematical model of mass traveling bubbles without interference effect is established, and the multi-peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method. The auther also predicted the function of interference effect after analyzing the experimental curves, deducted the theoretical emission noise of two bubbles and mass bubbles under the interference effect. In order to predict precisely the emitted noise from mass traveling bubbles, the paper also studied the distribution of air nuclei in water. It was through precise mathematical deduction, data imitation, and analysis to experimental data that this topic is studied. This dissertation is theoretically instructive and practically useful, to a certain extent, to the traveling bubble cavitation noise around a Schiebe body.