A computational and experimental study was conducted on nozzle geometries for rocket application rotating detonation engines (RDEs). Three geometries, including a nozzleless blunt body typically employed in RDE combustor hot-fire testing and two aerospike nozzles, were investigated. Simulations of the exhaust flow of a rotating high-frequency, high-pressure ratio wave based on rocket RDE test results were related to comparable constant-pressure conditions. Computational and experimental results showed the high momentum added by the highest-pressure detonation products influences the exhaust plume differently than a comparable steady flowfield fed by the same average product gas flow rate. In particular, the RDE exhaust flow tended to enhance entrainment on the nozzleless blunt body recirculation region and delay flow separation on nozzle expansion surfaces due to overexpansion compared to a constant-pressure engine. Results have important ramifications for isolating RDE combustor performance from nozzle effects and must be considered for future design of nozzle geometries to exploit the high-frequency, high-pressure ratio outflow of an RDE.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Computational and Experimental Study of Nozzle Performance for Rotating Detonation Rocket Engines


    Contributors:

    Published in:

    Publication date :

    2021-05-17


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    EXPERIMENTAL VALIDATION OF NOZZLE FLOW SIMULATIONS FOR ROCKET APPLICATION ROTATING DETONATION ENGINES

    Harroun, Alexis / Heister, Stephen D. / Ruf, Joseph H. | TIBKAT | 2020


    Experimental Validation of Nozzle Flow Simulations for Rocket Application Rotating Detonation Engines

    Harroun, Alexis / Heister, Stephen D. / Ruf, Joseph H. | AIAA | 2020


    Computational Fluid Dynamic Optimization of an Experimental Rotating Detonation Rocket Engine Nozzle

    Paxson, Daniel E. / Miki, Kenji / Perkins, Hugh D. et al. | AIAA | 2022


    Experimental Results for Geometrically Scaled Rotating Detonation Rocket Engines

    Knowlen, Carl / Mundt, Tyler J. / Kurosaka, Mitsuru | AIAA | 2023


    Characteristic Timescales for Rotating Detonation Rocket Engines

    Bennewitz, John W. / Burr, Jason R. / Lietz, Christopher F. | AIAA | 2021