Abstract Rotating detonation engines are widely studied because of their compact configurations and high thermal cycle efficiency. For simplification, most of the numerical simulations of rotating detonation engines used premixed reactant mixtures. The rotating detonation waves under non-premixed conditions are not studied enough. The width of air injection throat is an important design parameter for a non-premixed rotating detonation engine. Here, a series of three-dimensional numerical simulations of a non-premixed rotating detonation engine with different air injection throat widths are performed. Cases with three different throat widths of 0.4 mm, 1.0 mm and 2.0 mm are calculated. The transient explicit density-based solver in ANSYS Fluent is used to perform the simulations. Detonation combustion happens in different radial domains for different air injection throat widths. When the air injection throat width is 1.0 mm, there is only one rotating detonation wave in the combustion chamber when the total mass flow rate is 272.3 g/s or 500 g/s. When the total mass flow rate is further increased to 1000 g/s, there are two co-rotating detonation waves in the combustion chamber. While for air injection throat width 0.4 mm, the transition to two-wave mode happens at a smaller total mass flow rate of 500 g/s. When the air injection throat width is too large, the interaction between the injection process and the propagating of rotating detonation wave becomes very strong, and the detonation wave quenches due to the insufficient injected reactants. The engine requires a larger total mass flow rate to sustain the continuous propagation of the rotating detonation wave.

    Highlights The effects of air injection throat width on a non-premixed RDE are analyzed. Detonation combustion happens in different radial domains under different throat widths. There are fewer RDWs in the combustion chamber for larger throat width. The pressure in air plenum must be high enough to resist the influence of the RDW.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effects of air injection throat width on a non-premixed rotating detonation engine


    Beteiligte:
    Sun, Jian (Autor:in) / Zhou, Jin (Autor:in) / Liu, Shijie (Autor:in) / Lin, Zhiyong (Autor:in) / Lin, Wei (Autor:in)

    Erschienen in:

    Acta Astronautica ; 159 ; 189-198


    Erscheinungsdatum :

    2019-03-21


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Effects of injection nozzle exit width on rotating detonation engine

    Sun, Jian / Zhou, Jin / Liu, Shijie et al. | Elsevier | 2017



    Further Experimentation of a Premixed Rotating Detonation Engine

    Andrus, Ionio Q. / Polanka, Marc D. / Schauer, Frederick R. et al. | AIAA | 2017



    Variably Premixed Rotating Detonation Engine for Evaluation of Detonation Cycle Dynamics

    Zachary M. Ayers / Venkat Athmanathan / Terrence R. Meyer et al. | NTRS | 2023