With multi-stream coannular nozzles, sometimes tones occur that may cause the nozzle to fail noise regulation standards. A two-stream nozzle was studied experimentally and numerically in an attempt to identify the sources of such tones and explore remedies. For the given nozzle configuration, sharp tones occurred in a range of low jet Mach numbers. The tones apparently occurred due to a coupling between vortex shedding from the struts, which held the nozzles and the center-body together, with various duct acoustic modes. A leading edge treatment of the struts is shown to eliminate the tones via disruption of the vortex shedding.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Tones Encountered with a Coannular Nozzle and a Method for Their Suppression


    Beteiligte:

    Kongress:

    Aeroacoustics Conference (AIAA, CEAS) Aviation Forum 2017 ; 2017 ; Denver, CO, United States
    American Institute of Aeronautics and Astronautics (AIAA) Aviation Forum 2017 ; 2017 ; Denver, CO, United States


    Erscheinungsdatum :

    2017-09-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Tones Encountered with a Coannular Nozzle and a Method for Their Suppression

    Zaman, K. B. M. Q. / Bridges, J. E. / Fagan, A. F. et al. | AIAA | 2018


    Tones encountered with a coannular nozzle and a method for their suppression

    Zaman, Khairul Q. / Bridges, James E. / Fagan, Amy F. et al. | AIAA | 2017




    Shock-Associated and Turbulent Mixing Jet Noise for Coannular Nozzle

    Salikuddin, M. / Confederation of European Aerospace Societies| AIAA | British Library Conference Proceedings | 1995