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Two-dimensional Numerical Simulation of Melt-wave Erosion in Solid Armatures


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Two-dimensional Numerical Simulation of Melt-wave Erosion in Solid Armatures
GONG FeiWENG Chun-sheng
National Key Lab of Transient Physics,NUST,Nanjing 210094,China
railguns solid armature melt-wave erosion finite difference method
In order to reflect armature erosion characteristics in railguns exactly,a computational model of melt-wave erosion in two-dimensional solid armatures is developed.The variation characteristics of melt-wave erosion are obtained adopting coupling calculations by using the Peaceman-Rachford(P-R)format of the finite difference method.The calculation results show that:the driving mechanism of erosion is the velocity skin effect,a concentration of current is at the rear edge of the rail-armature interface,and the erosion occurs due to the joule heating.The melt-wave moves from the back to the front of the armature.It is possible to cause an armature transition when the melt-wave reaches the front of the armature.


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Last Update: 2012-10-12