Abstract Two-dimensional numerical simulations are performed to investigate the effects of spatially discrete slot injection of reactants on the features of detonation wavelets in a rotating detonation engine (RDE). The detonation dynamics is described by a model based on the reactive Euler equations coupled with two-step, induction-reaction kinetics. By varying injection conditions and the chemical sensitivity of the reactive mixture, a parametric study is carried out to examine the influence of the injection-slot area ratio α on the detonation wavelet patterns and different flow features inside an RDE combustion chamber. The simulation results demonstrate that the injection conditions, i.e., stagnation temperature and pressure, have a similar influence on slot-ozzle rotating detonation wavelets (RDWs) as compared with the mini-nozzle RDWs reported in a previous study. The corresponding mass flow rate and inhomogeneity generated due to the presence of slot injection, however, play a key factor in the self-sustained rotating detonation and its frontal structure.

    Highlights The detonation wavelets with slot injections are resolved computationally with GPU. Flow features are compared between the slot injection and micro-nozzle injection. The wavelet number dependence on slot injection stagnation properties are studied. The instabilities induced by the slot injections in rotating detonation are highlighted.


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    Titel :

    Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine


    Beteiligte:
    Yan, Chian (Autor:in) / Teng, Honghui (Autor:in) / Ng, Hoi Dick (Autor:in)

    Erschienen in:

    Acta Astronautica ; 182 ; 274-285


    Erscheinungsdatum :

    2021-02-07


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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