Three-dimensional numerical simulations were performed to study the effects of flow direction and flow velocity on the flow regime behind a curved pipe represented by a curved circular cylinder. The cylinder is based on a previous study and consists of a quarter segment of a ring and a horizontal part at the end of the ring. The cylinder was rotated in the computational domain to examine five incident flow angles of 0–180° with 45° intervals at Reynolds numbers of 100 and 500. The detailed wake topologies represented by λ2 criterion were captured using a Large Eddy Simulation (LES). The curved cylinder leads to different flow regimes along the span, which shows the three-dimensionality of the wake field. At a Reynolds number of 100, the shedding was suppressed after flow angle of 135°, and oblique flow was observed at 90°. At a Reynolds number of 500, vortex dislocation was detected at 90° and 135°. These observations are in good agreement with the three-dimensionality of the wake field that arose due to the curved shape.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Wake dynamics of a 3D curved cylinder in oblique flows


    Beteiligte:
    Soonhyun Lee (Autor:in) / Kwang-Jun Paik (Autor:in) / Narakorn Srinil (Autor:in)


    Erscheinungsdatum :

    2020




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Numerical simulation of propeller wake vortex–rudder interaction in oblique flows

    Hu, Jian / Zhang, Weipeng / Guo, Hang et al. | Taylor & Francis Verlag | 2021


    Wake Structures of a Particle in Straight and Curved Flows

    Fukada, Toshiaki / Takeuchi, Shintaro / Kajishima, Takeo | Springer Verlag | 2016


    Role of splitter plates in modifying cylinder wake flows

    Hasan, M. A. Z. / Budair, M. O. | AIAA | 1994


    Role of Splitter Plates in Modifying Cylinder Wake Flows

    Hasan, M.A.Z. | Online Contents | 1994