In the absence of inventive practice, the hydrodynamic flows on both sides of a vertically oriented bluff body (e.g., cylinder) traveling through water tend to hug the bluff body proximate its curved back surface and to converge behind the bluff body, resulting in lateral sway of the bluff body. Exemplary inventive practice provides for attachment of a pair of waterjet-streaming devices at opposite axial ends of a bluff body such as a cylinder. The waterjet streams discharged by the two inventive devices, which adjoin the vertical bluff body, deflect the hydrodynamic flows on both curved side surfaces of the bluff body. The inventive apparatus thereby encourages a continued approximate parallelity of the hydrodynamic flows behind the bluff body, resulting in significantly greater stability of the bluff body. Some exemplary embodiments of the present invention provide for attachment of a single waterjet-streaming device at one axial end of the bluff body.


    Access

    Download


    Export, share and cite



    Title :

    Hydrodynamic flow separation device for an axisymmetric bluff body


    Contributors:

    Publication date :

    2021-01-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F03B MACHINES OR ENGINES FOR LIQUIDS , Kraft- und Arbeitsmaschinen oder Kraftmaschinen für Flüssigkeiten





    Aerodynamic Flow Control of Axisymmetric Bluff Body by Coupled Wake Interactions

    Lambert, Thomas J. / Vukasinovic, Bojan / Glezer, Ari | AIAA | 2018


    Axisymmetric bluff-body drag reduction using circumferential grooves

    HOWARD, F. / GOODMAN, W. / WALSH, M. | AIAA | 1983


    Aerodynamic Flow Control of an Axisymmetric Bluff Body in Prescribed Maneuvers

    Lambert, Thomas / Vukasinovic, Bojan / Glezer, Ari | British Library Conference Proceedings | 2015