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.


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    Title :

    Variably Positioned Guide Vanes for Aerodynamic Choking


    Contributors:

    Publication date :

    1974


    Size :

    8 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English