Bubble Motion in Transformer Oil under Non-Uniform Electric Fields
CAI Dan** , LIU Lie, CHENG Guo-Xin, ZHANG Qiang, ZHAO Xue-Long, ZHAO Qi
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073
Abstract ：We investigate the bubble motion in transformer oil under a typical non-uniform electric field. Based on the principle of virtual work, an analytical equation is derived for the electric force putting on the bubbles. The bubble's visualized motion graphics are then obtained by using the finite-element method, which utilizes Comsol Multiphysics software. The effects of bubble radius and release position on the motion trajectory are studied. It is found that, under the non-uniform electric field, the bubbles have a long residence time between the electrodes. This accordingly can lead to a higher probability of forming a bubble-bridge along the bubble motion trajectory. The bubbles with a particular radius or release position are easier to form bubble-bridge between the electrodes. They can increase the chance of liquid breakdown.
收稿日期: 2012-07-03
出版日期: 2013-03-29
:
77.22.Jp
(Dielectric breakdown and space-charge effects)
52.80.Wq
(Discharge in liquids and solids)
[1] Liu X S 2005 High Pulsed Power Technology (Beijing: National Defence Industry Press) pp 1–20 (in Chinese)1994 IEEE Trans. Dielectr. Electr. Insul. 1 1016 1995 J. Phys. D: Appl. Phys. 28 178 2008 IEEE Trans. Dielectr. Electr. Insul. 15 626 Res. Rep. Inf. Sci. Electr. Eng. Kyushu University. 3 23Dielectric Physics (Xi'an: China Machine Press) p 266 (in Chinese)2005 J. Appl. Phys. 97 113304 2002 J. Appl. Phys. 91 24 2004 J. Appl. Phys. 96 5129 2006 IEEE Trans. Plasma Sci. 34 1068 2007 J. Appl. Phys. 102 063302 High Voltage Electrostatic Field (Shanghai: Shanghai Science and Technology Press) pp 336–339 (in Chinese)2000 Int. J. Thermal Sci. 39 39 Electrodynamics Tutorial (Changsha: National University of Defence Technology Press) p 129 (in Chinese)1958 J. Appl. Phys. 29 1182 1994 IEEE Proc. 4th International Conference on Properties and Applications of Dielectric Materials (Brisbane Australia 3–8 July 1994) vol 2 p 459 2007 Exp. Therm. Fluid Sci. 32 17
[1]
.
[2]
.
[3]
.
[4]
.
[5]
KONG Ling-Bao**;HOU Zhi-Ling
. Numerical Simulations of Nonlinear Dynamics of Electron Cyclotron Maser with a Straight Beam
[6]
PANG Hua**;ZHANG Gu-Ling;WANG Xing-Quan;LV Guo-Hua;CHEN Huan;YANG Si-Ze;
. Mechanical Performances of Carbonitriding Films on Cast Iron by Plasma Electrolytic Carbonitriding
[7]
XIAO Chun;ZHANG Ye-Wen;ZHENG Fei-Hu;WEI Wen-Jie;AN Zhen-Lian. Electric Field Analysis of Space Charge Injection from a Conductive Nano-Filler Electrode
[8]
YU Li; YU Shou-Wen;FENG Xi-Qiao. Constitutive Relations of Ferroelectric Ceramics with Electric Fatigue Effects
[9]
ZHANG Heng-Da;CHEN Guang-Chao; LI Cheng-Ming;TANG Wei-Zhong; LÜFan-Xiu. Dielectric Characterization of Free-Standing Diamond Films
[10]
ZHANG Ye-Wen;LI Ji-Xiao;ZHENG Fei-Hu;PENG Zong-Ren;WU Chang-Shun;XIA Zhong-Fu. Formation and Distribution of Space-Charge in Cross-Linked
Polyethylene
2013, Vol. 30 
