An open-source program implementing a block-structured adaptive mesh refinement method was adopted for the fine structure numerical simulation of detonation initiation in supersonic combustible mixtures. Simulations were conducted on a nested parallel computing system. The initiation process was specified as three stages, and their respective flow field characteristics were analyzed. Results indicate that a hot jet under specific conditions can have a similar effect as a pneumatic oblique bevel for inducing periodical shock-induced detonative combustion by a bow shock. The interaction of bow shock–induced combustion with the local detonation wave, produced by the reflection shock on the upper wall, can create a structure with two triple-wave points. The hot jet not only plays a role in the detonation initiation but also acts as a stabilizing control mechanism for detonation propagation. In the simulations in this study, the detonation wave propagates in an overdriven state initially and achieves self-sustaining motion after the shutdown of the hot jet. Subsequently, the final pisiform structure of typical stable Chapman-Jouguet detonation cells is formed.


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    Titel :

    Adaptive Mesh Refinement–Based Numerical Simulation of Detonation Initiation in Supersonic Combustible Mixtures Using a Hot Jet


    Beteiligte:
    Cai, Xiaodong (Autor:in) / Liang, Jianhan (Autor:in) / Lin, Zhiyong (Autor:in) / Deiterding, Ralf (Autor:in) / Qin, Hui (Autor:in) / Han, Xu (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    02.08.2013




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt