The effect of aerodynamically induced pre-swirl on the acoustic and performance characteristics of an automotive centrifugal compressor is studied experimentally on a steady-flow turbocharger facility. Accompanying flow separation, broadband noise is generated as the flow rate of the compressor is reduced and the incidence angle of the flow relative to the leading edge of the inducer blades increases. By incorporating an air jet upstream of the inducer, a tangential (swirl) component of velocity is added to the incoming flow, which improves the incidence angle particularly at low to mid-flow rates. Experimental data for a configuration with a swirl jet is then compared to a baseline with no swirl. The induced jet is shown to improve the surge line over the baseline configuration at all rotational speeds examined, while restricting the maximum flow rate. At high flow rates, the swirl jet increases the compressor inlet noise levels over a wide frequency range. At low to mid-flow rates, on the other hand, the swirl jet reduces the broadband whoosh noise in the 4-11 kHz range. Mild surge detected for the baseline configuration in the 15-35 Hz range at mid flow rates and high speeds is also suppressed with the swirl jet configuration due to favorable local changes in slope of the compressor characteristics.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of Aerodynamically Induced Pre-Swirl on Centrifugal Compressor Acoustics and Performance


    Additional title:

    Sae International Journal of Passenger Cars. Mechanical Systems
    Sae Int. J. Passeng. Cars - Mech. Syst


    Contributors:

    Conference:

    SAE 2015 Noise and Vibration Conference and Exhibition ; 2015



    Publication date :

    2015-06-15


    Size :

    8 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    The Effect of Ported Shroud Recirculating Casing Treatment on Turbocharger Centrifugal Compressor Acoustics

    Selamet, Ahmet / Karim, Ahsanul / Miazgowicz, Keith et al. | SAE Technical Papers | 2017


    Effect of inlet distortion, co-swirl and counter-swirl on axial compressor/fan performance

    Roy, B. / Kumar, H. / Batra, A. et al. | British Library Conference Proceedings | 2000


    Aerodynamically buoyant sailcraft

    CHUTTER RICHARD | European Patent Office | 2017

    Free access