Shock wave intensity and propagation features of a photo-multiplier tube (PMT)’s underwater implosion were studied. Firstly, based on the theory of bubble dynamics and bubble rupture dynamics, a spherical bubble collapse’s time and shock wave propagation features in bubble burst rebound stage were analyzed, it was found that the physical process of a vacuum vessel’s underwater implosion is similar to that of an underwater bubble collapse. Secondly, a numerical simulation model for an underwater bubble collapse was built. Its feasibility was verified through comparing the results of simulation with this model with those of tests and theoretical calculation for some examples published in literature. Finally, the numerical simulation was conducted for a PMT’s underwater implosion based on the actual working environment. The influence of a PMT’s external shape size on the shock wave propagation features was analyzed, the shock wave intensity of PMT’s underwater implosion was determined. The results provided a reference for preventing PMT implosion.
Key words
PMT /
underwater implosion /
shock wave /
numerical simulation
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