In this study of arcing phenomena in transitioned solid armatures it is proposed that following forward acceleration of the arc plasma, re-strikes occur towards the rear of the contact surface resulting in commutation of current to the re-strike arcs. Thus a repetitive sequence of current conduction is predicted at a frequency dependent on the arc transit time along the armature surface. An analytical solution of the proposed theoretical model for the arcing phase evaluates the transient rail/armature gap voltages due to arc voltage, rail and armature resistances and magnetic flux changes. Comparison of the predicted rail/armature gap voltages at the front of the armature with measured muzzle voltage waveforms for a typical 90 mm armature shows sufficiently close agreement to support the validity of the theoretical model. The additional resistive losses as a result of transition are estimated to be >30% of the exit kinetic energy of 10 MJ. The deposition of most of this as thermal energy in the rail/armature gaps is expected to have a significant impact on structural design requirements


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Arcing phenomena in transitioned solid armatures


    Weitere Titelangaben:

    Lichtbogenbildungserscheinungen in übertragenen massiven Armaturen


    Beteiligte:
    James, T.E. (Autor:in)


    Erscheinungsdatum :

    1997


    Format / Umfang :

    6 Seiten, 14 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    The Plasma Pressure in Transitioned Metal Armatures and its Structural Implications on Railguns

    Zowarka, R. C. / Werst, M. D. / Hotz, T. J. et al. | British Library Conference Proceedings | 1993


    Military radar transitioned using commercial technology

    Bayma, R. W. / Trujillo, E. / ERA Technology | British Library Conference Proceedings | 1997


    Non-steady phenomena in railgun plasma armatures

    Jamison, K.A. / Burden, H.S. / Powell, J.D. et al. | Tema Archiv | 1986


    Stripping armatures

    Engineering Index Backfile | 1929