INTENSIFICATION OF THE MAGNETIC FIELD IN JET FLOWS OF CONDUCTING MATERIALS: COLLISION OF TWO SUCH FLOWS

In the context of the one-dimensional problem of magnetic hydrodynamics on the collision and spread of plane jets of an incompressible conducting material in which a transverse magnetic fi eld was created before the collision of its jets, the intensifi cation of the magnetic fi eld in the material of such a jet under an extensional strain with elongation of its fi bers in the direction of the magnetic fl ux lines was investigated. With the use of the time integral Laplace transform, the asymptotics of the intensifi cation of the magnetic fi eld in a jet of a metal was determined as a function of the magnetic Reynolds number of the jet. It is shown that in the case of deformation of a metal, in which a magnetic fi eld was preliminarily created at a fast rate under an explosive or an impact load, the magnetic fi eld in the metal can be intensifi ed to the level at which the effects accompanying the generation of this fi eld will substantially infl uence the behavior of the metal. The results obtained explain the substantial decrease in the penetrating ability of a cumulative charge in the case where an axial magnetic fi eld is created in the coat of the charge before its detonation.
In the context of the one-dimensional problem of magnetic hydrodynamics on the collision and spread of plane jets of an incompressible conducting material in which a transverse magnetic fi eld was created before the collision of its jets, the intensifi cation of the magnetic fi eld in the material of such a jet under an extensional strain with elongation of its fi bers in the direction of the magnetic fl ux lines was investigated. With the use of the time integral Laplace transform, the asymptotics of the intensifi cation of the magnetic fi eld in a jet of a metal was determined as a function of the magnetic Reynolds number of the jet. It is shown that in the case of deformation of a metal, in which a magnetic fi eld was preliminarily created at a fast rate under an explosive or an impact load, the magnetic fi eld in the metal can be intensifi ed to the level at which the effects accompanying the generation of this fi eld will substantially infl uence the behavior of the metal. The results obtained explain the substantial decrease in the penetrating ability of a cumulative charge in the case where an axial magnetic fi eld is created in the coat of the charge before its detonation.
Author:  S. V. Fedorov
Keywords:  magnetic hydrodynamics, conducting material, jet fl ow, magnetic fi eld, rapid deformation, cumulative charge, cumulative jet
Page:  654 -664