Reynolds-Averaged Navier-Stokes simulations have been performed on a three-stream invertedvelocity profile nozzle with and without various configurations of chevrons attached.The nozzle was mounted on a planform to imitate an engine mounted above a wing, shieldingground observers from engine noise. Several chevron designs intended to aggressively mix thejet and move noise sources upstream for shielding were examined to investigate their effects onnoise and thrust. Numerical results for the baseline nozzle and one chevron configuration werecompared with far-field noise and particle image velocimetry data obtained in NASA GlennResearch Center’s Aero-Acoustic Propulsion Laboratory. A configuration in which chevronsalternate penetration into the primary stream and tertiary fan stream was explored using theModern Design of Experiments approach. Short, high-penetration chevrons demonstrated asignificant noise reduction for a relatively small thrust penalty.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Numerical Investigation of a Shielded Chevron Nozzle


    Beteiligte:

    Kongress:

    AIAA Science and Technology Forum and Exposition (SciTech) ; 2019 ; San Diego, CA, United States


    Erscheinungsdatum :

    2019-01-07


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    Numerical analysis of chevron nozzle noise

    Pauz, Vitali / Niemoeller, Ansgar / Meinke, Matthias H. et al. | AIAA | 2017


    Near-Field Investigation of Chevron Nozzle Mechanisms

    Callender, B. / Gutmark, E. / Martens, S. | AIAA | 2008


    Experimental and Numerical Investigation of a Supersonic C-D Chevron Nozzle

    Burak, Markus / Eriksson, Lars-Erik / Munday, David et al. | AIAA | 2009


    A Near Field Investigation of Chevron Nozzle Mechanisms

    Callender, Bryan / Gutmark, Ephraim / Martens, Steve | AIAA | 2003