Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/70903
Title: Finite element modelling for electric field distribution around positive streamers in oil
Authors: Nguyen, Van Dung
Le, Vinh Truong
Keywords: Streamers
Electric field
Branching
Velocity
Finite element modelling
Issue Date: 2020
Series/Report no.: Vietnam Journal of Science and Technology;Vol. 58, No. 01 .- P.56-69
Abstract: Electric field distribution of positive streamers during propagation was determined with the finite element method by using COMSOL multiphysics. Modelling was performed at 210 kV and 270 kV. The geometrical shape of streamers was modelled with cylinder and sphere for the case of 210 kV while a growing cylinder was used for streamer propagation at 270 kV. In addition, a spherical model was used for determining the relationship between the branching of streamers and the electric field at the tip of branches. It is obtained from the simulation results that the 2nd mode streamers has the electric field at channel tips of about 0.1 MV/cm while 8.3 MV/cm was received for the 4th mode streamers. The simulation results also reveal that the shielding effect resulting from streamer branching significantly reduces the electric field at the between channels is about 30°-channel tips, and the shielding effect disappears with the angle - 60° depending on the size of streamer envelope. The hypothesis on correlation among velocity, streamer branching and electric field is suggested.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/70903
ISSN: 2525-2518
Appears in Collections:Vietnam journal of science and technology

Files in This Item:
File Description SizeFormat 
_file_
  Restricted Access
1.11 MBAdobe PDF
Your IP: 3.144.224.116


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.