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Ultimate kinematic characteristics of armatures with orthotropic and anisotropic electroconductivity

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2 Author(s)
Shvetsov, G.A. ; Lavrentyev Inst. of Hydrodynamics, Acad. of Sci., Novosibirsk, Russia ; Stankevich, S.V.

The paper presents the results of the theoretical analysis of ultimate kinematic characteristics of multilayer armatures in railguns. The ultimate kinematic characteristics are obtained provided that the Joule heating of metallic layers by electric current in accelerating does not tend to increase the temperature in an arbitrary layer above its melting temperature. Consideration is given to the accelerated armatures consisting of metallic layers separated by insulating or weakly conducting layers. The study provides some dependencies of the ultimate velocity on the acceleration distance and armature mass resulting from a numerical solution of equations for the unsteady magnetic field diffusion and the heat conductivity in the two-dimensional statement. A possibility of increasing the ultimate kinematic characteristics is considered by changing the armature structure and properties of layer materials

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 1 )