Experimental studies of supersonic impinging jet flows suggest that they are greatly influenced by the flow-acoustic interactions through a feedback mechanism. The self-sustained oscillations of the jet column observed in these flows result in high velocities in the ambient medium induced by the large-scale coherent vortical structures in the jet shear layers. As a consequence, the suck down force on the surface from which the jet is issuing can reach as high as 60% of the primary jet thrust. In addition, the overall sound pressure levels (OASPL) increase significantly relative to a free jet. To alleviate these undesirable flow and acoustic characteristics, a novel control technique using supersonic microjets is demonstrated. Sixteen supersonic microjets are placed around the circumference of the main jet at the nozzle exit to disrupt the feedback mechanism. As a result, significant lift loss recovery (approximately 50%) and reduced near field OASPL (approximately 7 dB) are observed.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Active Control of Supersonic Impinging Jets


    Beteiligte:
    Krothapalli, A. (Autor:in) / Elavarasan, R. (Autor:in) / Alvi, F. (Autor:in) / Shih, C. (Autor:in) / Wardwell, Doug (Autor:in)


    Erscheinungsdatum :

    01.06.2001


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Active Control of High Temperature Supersonic Impinging Jets

    Kumar, Rajan / Lazic, Sladana / Alvi, Farrukh | AIAA | 2008


    Active Control of High Temperature Supersonic Impinging Jets

    Kumar, R. / Lazic, S. / Alvi, F. et al. | British Library Conference Proceedings | 2008


    Active and Adaptive Control of Supersonic Impinging Jets

    Huadong Lou / Farrukh Alvi / Chiang Shih | AIAA | 2006


    Supersonic twin impinging jets

    Elavarasan, R. / Venkatakrishnan, L. / Krothapalli, A. et al. | AIAA | 2000


    Supersonic Twin Impinging Jets

    Elavarasan, R. / Venkatakrishnan, L. / Krothapalli, A. et al. | British Library Conference Proceedings | 2000