|Table of Contents|

Unsteady Electromagnetic Effect on Solid Armature Railguns

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年01期
Page:
108-111
Research Field:
Publishing date:

Info

Title:
Unsteady Electromagnetic Effect on Solid Armature Railguns
Author(s):
LI Xin1WENG Chun-sheng2
1.School of Power Engineering,NUST,Nanjing 210094,China;2.National Key Lab of Transient Physics,NUST,Nanjing 210094,China
Keywords:
railguns solid armature electromagnetic fields temperature fields finite difference method coupling calculation
PACS:
TJ30
DOI:
-
Abstract:
According to the Maxwell equations and the heat conduction equations,a two-dimensional unsteady computational model is applied to investigate the electromagnetic and temperature fields of the rail and the solid armature.Coupling calculations are carried out by using the P-R finite difference method.The results show the distributions of the magnetic induction intensity,the current density and the temperature.Due to the motion of the armature,a local concentration of current and Joule heating occurs at the rail-armature interface and causes significant erosion and damage.The work has a guiding significance for the armature design,and provides theoretical foundations for avoiding velocity transition and erosion in fast moving armature.

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Last Update: 2012-11-19