A choking device to cause a sonic barrier to be formed which reduces the transmission of noise in a direction opposed to the direction of air flow in a compressor that may be part of an aircraft gas turbine engine is described. The noise reduction is accomplished by proper shaping and movement of inlet guide vanes, and an actuator is connected to selected guide vanes to effect movement by programmed amounts as required to choke or partially choke within the design range of the axial-flow-air compressor.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Variably positioned guide vanes for aerodynamic choking


    Contributors:

    Publication date :

    1974-08-13


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :





    Aerodynamic and Aeroacoustic Performance of Ultra Low Count Fan Outlet Guide Vanes

    Billson, M. / Ore, S. / Carlsson, D. | British Library Conference Proceedings | 2011


    Flow Choking and Shock Wave Structure at Diffuser Vanes in a High Speed Centrifugal Compressor

    Yamane, T. / Nagashima, T. / International Society for Air Breathing Engines; Australian Committee | British Library Conference Proceedings | 1995