Shock wave intensity and propagation features of a PMT’s underwater implosion
JIN Jian1, HOU Hailiang1, CHEN Pengyu1, ZU Xi1, WU Linjie1, HE Miao2, WANG Tianqiong1
1. Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China；
2. Institute of high energy physics, Chinese Academy of Sciences, Beijing 100049, China
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.
金 键1，侯海量1，陈鹏宇1，朱 锡1，吴林杰1，何 苗2,王天穹1. PMT水下内爆冲击波强度与传播特性研究[J]. 振动与冲击, 2018, 37(13): 100-104.
JIN Jian1, HOU Hailiang1, CHEN Pengyu1, ZU Xi1, WU Linjie1, HE Miao2，WANG Tianqiong1. Shock wave intensity and propagation features of a PMT’s underwater implosion. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(13): 100-104.
[1] 王贻芳. 大亚湾反应堆中微子实验[J].科学，2015，64（3）：5-8.
Wang Y F. Daya Bay reactor neutrino experiments[J]. Science，2015, 64（3）：5-8.
[2] 曹俊. 大亚湾与江门中微子实验[J]. 中国科学：物理学 力学 天文学.2014，44：1025-1040.
Cao J. Daya Bay and jiangmen underground Neutrino observatory（JUNO）neutrino experiments[J]. Sci sin-Phys Mech Astron. 2014, 44(2)：1025-1040.
[3] Fukuda S, Fukuda Y, Hayakawa T, et al. The Super Kamiokande detector[J]. Nuclear Instruments and Methods in Physics Research A, 2003, 501:418:-462.
[4] Ling J J，Bishai M，Diwan M，et al. Implosion chain reaction mitigation in underwater assemblies of photomultiplier tubes[J]. Nuclear Instruments and Methods in Physics Research A, 2013, 729：491-499.
[5] Brennen C E. Cavitation and bubble dynamics[M]. Cambridge：Cambridge University Press，2013.
[6] Rayleigh L. On the pressure developed in a liquid during the collapse of a spherical cavity[J]. Philosophical Magazine Series 6，1917（34）：94-98.
[7] Plesset M S. The dynamics of cavitation bubble[J]. Journal of Applied Mechanics. 1949（16）：813-821.
[8] Ivany R D, Hammitt F G. Cavitation bubble collapse in viscous compressible liquids-numerical analysis[J]. Journal of Applied Mechanics. 1965（87）：977-985.
[9] Hicking R, Plesset M S. Collapse and rebound of a spherical bubble in water[J]. The physics of fluids. 1964（7）：7-14.
[10] Turner S E. Underwater implosion of glass spheres[J].The Journal of the Acoustical Society of Americal，2007，121（2）：844-852.
[11] Cole H R.Underwater explosion[M]. Princeton，NEW Jersey：Princeton University Press，1948.
