A dual-stream nozzle configuration was studied numerically with the objective of predicting the appearance of tones and study their sources. It was found that some of the tones traced to a coupling between Strouhal shedding from the struts, which held different pieces of the nozzle together, and various duct acoustic modes. A focus of the work was on exploring the nature of the duct modes. First, elements of the numerical procedure were studied for a 4-strut nozzle, validating the results with existing experimental data. The approach was then applied to a 3-strut geometry and four different excitation methods. The predicted tones and associated duct modes are analyzed in detail.


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    Title :

    Resonance and Tones in Dual-Stream Nozzle Flows


    Contributors:

    Conference:

    AIAA Aviation 2018 ; 2018 ; Atlanta, GA, United States


    Publication date :

    2018-06-25


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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