Ultimate kinematic characteristics of armatures with orthotropic and anisotropic electroconductivity

Author

Shvetsov, G.A. ; Stankevich, S.V.

Author_Institution

Lavrentyev Inst. of Hydrodynamics, Acad. of Sci., Novosibirsk, Russia

Volume

33

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

266

Lastpage

271

Abstract

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

Keywords

heat conduction; kinematics; magnetic fields; railguns; Joule heating; acceleration distance; anisotropic electroconductivity; armature mass; armatures; heat conductivity; kinematic characteristics; melting temperature; orthotropic electroconductivity; railguns; two-dimensional statement; unsteady magnetic field diffusion; weakly conducting layers; Acceleration; Current; Equations; Insulation; Kinematics; Magnetic fields; Nonhomogeneous media; Railguns; Resistance heating; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.559967

Filename

559967