A computational study is presented of the nonlinear combustion instability of a multi-injector rocket engine. The study addresses a choked nozzle and a combustion chamber with 10 and 19 coaxial injector ports. Computations using a three-dimensional unsteady k ω shear-stress transport delayed detached-eddy simulation method provide detailed time-resolved information about the combustion instability. The spontaneous longitudinal-mode instability is observed for the 10- and 19-injector geometries with a combustion-chamber diameter of 28 cm. The triggered tangential and longitudinal instability modes are obtained for the 19-injector geometry with a combustion-chamber diameter of 43 cm by pulsing the injector mass flux. It is shown that an oscillating combustion-chamber flow can be triggered to a new mode with a larger disturbance amplitude. The streamwise vorticity created by the instability impacts the heat release in a manner that supports the instability. A preliminary study of injector-size scaling effects is performed by comparison of the 10- and 19-injector combustors.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Nonlinear Combustion Instability in a Multi-Injector Rocket Engine


    Beteiligte:
    Xiong, Juntao (Autor:in) / Morgan, Hugh (Autor:in) / Krieg, Jeremy (Autor:in) / Liu, Feng (Autor:in) / Sirignano, William A. (Autor:in)

    Erschienen in:

    AIAA Journal ; 58 , 1 ; 219-235


    Erscheinungsdatum :

    2019-10-08


    Format / Umfang :

    17 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Longitudinal Combustion Instability in a Rocket Engine with a Single Coaxial Injector

    Nguyen, Tuan M. / Popov, Pavel P. / Sirignano, William A. | AIAA | 2017



    Combustion Simulation of 82-Injector Rocket Engine

    Xiong, Juntao / Liu, Feng / Sirignano, William A. | AIAA | 2022