In this study, a three-dimensional numerical simulation of a large length-diameter ratio solid rocket motor is carried out using the large-eddy simulation. Pressure oscillation excited by significant parietal vortex shedding (PVS) is observed. The acoustic feedback model is successfully extended to investigate the interaction between PVS and pressure oscillations, and the result proves that the model has sufficient accuracy (with 2.84% relative error) to predict the PVS frequency in an accelerating flow field. Reduced-order variational mode decomposition (RVMD) is performed to analyze the vorticity field, indicating that the method can identify the PVS frequency accurately (with 3.42% relative error) and capture large-scale vortex structures that remain intact at the rear of the combustion chamber. Based on RVMD and Hilbert spectral analysis, the framework of model-based time-frequency analysis is established and used to verify the stability of PVS frequency.


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    Titel :

    Three-Dimensional Study of Vortico-Acoustic Interaction in a Simulated Solid Rocket Motor


    Beteiligte:
    Hu, Hengyu (Autor:in) / Tian, Ruipeng (Autor:in) / Wang, Dexin (Autor:in) / Ding, Miao (Autor:in) / Huang, Haibo (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.11.2024




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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