Two transition modes combustion/deflagration/detonation have been proved to exist in porous reactive media, which are highly confined in steel tubes. One mode presents a transition shock/detonation, e.g. in a RDX-wax, the other shows a progressive and steady acceleration of the combustion wave until detonation in a spherical double-base powder. We investigated propagation of the compression waves in front of the combustion front with Manganin gages and strain gages, and we showed that the explosive bed is quasi-elastic whereas the powder bed undergoes intense mechanical work. The resulting difference in energy dissipation in front of the combustion front may be responsible for the different behaviour of these two reactive media. If the mechanical properties of the spherical powder are changed by crushing, it is shown that it can also undergo a transition shock/detonation.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Proprietes mecaniques des poudres et explosifs pulverulents et mode de transition deflagration/detonation


    Additional title:

    Mechanical properties of powders and explosives and transition mode from deflagration-to-detonation


    Contributors:

    Published in:

    Publication date :

    1986


    Size :

    8 Seiten




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    French





    Turbulence Induced Deflagration-to-Detonation Transition

    Chambers, Jessica / Ahmed, Kareem | AIAA | 2017



    Numerical simulation of deflagration-to-detonation transition

    Oran, Elaine / Khokhlov, Alexei | AIAA | 1999


    Numerical Simulation of Deflagration-to-Detonation Transition

    Oran, E. S. / Khokhlov, A. M. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1999