A three-dimensional Navier-Stokes code has been extended to provide a simulation for the railgun plasma armature. This code was previously used with an approximate electromagnetic model to provide a two-dimensional simulation of a railgun plasma armature flow in the plane containing the insulators. A new three-dimensional electromagnetic solver has been incorporated into the code to permit full 3-D nonsteady MHD simulations of the plasma armature flow in a railgun. The finite-difference equations for magnetic vector potential and electric potential are solved using the ICCG method. The new electromagnetic solver was validated using 3-D solutions obtained from the finite element electromagnetic code MEGA. A full bore, 3-D simulation of a plasma armature reveals flow patterns significantly different than those of rail or insulator plane 2-D simulations. In particular, the maximum J*B force occurs off-axis and results in a plasma flow away from the projectile along the axis of symmetry. A zone of high shear flow forms near the rail surfaces which increases the viscous losses. Zones of low current, nearly stagnant flow form near the base of the projectile, consistent with experimental observations of a buffer between the armature and the projectile


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    3-D plasma armature railgun simulations


    Weitere Titelangaben:

    Dreidimensionale Plasmaarmaturschienengeschützsimulationen


    Beteiligte:
    Kondrashov, D. (Autor:in) / Keefer, D. (Autor:in)


    Erscheinungsdatum :

    1995


    Format / Umfang :

    6 Seiten, 11 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Plasma puffing from a railgun armature

    Marshall, R.A. | Tema Archiv | 1984


    Spatial effects in a railgun plasma armature

    Katsnelson, S. / Zagorskii, A.V. | Tema Archiv | 1997


    Plasma armature railgun launcher simulations at the University of Texas at Austin

    Weeks, D.A. / Weldon, W.F. / Zowarka, R.C. jun. | Tema Archiv | 1989


    Railgun armature arcing voltage drop

    Challita, A. / Barber, J.P. | Tema Archiv | 1995


    Further development of plasma-armature railgun simulation codes at MRL

    Richardson, D.D. / Kowalenko, V. | Tema Archiv | 1984