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    Numerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows

    Source: Journal of Applied Mechanics:;2020:;volume( 087 ):;issue: 006
    Author:
    Yan, Jinhui
    ,
    Deng, Xiaowei
    ,
    Xu, Fei
    ,
    Xu, Songzhe
    ,
    Zhu, Qiming
    DOI: 10.1115/1.4046317
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: We simulate two back-to-back full-scale tidal turbines using an in-house computational free-surface flow code. We briefly present the mathematical formulation of the computational framework. We first validate the proposed method on a single turbine configuration. A mesh refinement study is conducted to ensure the result is converged. We then quantify the wake effect and free-surface effect on tidal turbine performance by a case study. To investigate the free-surface effect, we perform both pure hydrodynamics and free-surface simulations. The time history of thrust and production coefficients is quantified. In both pure hydrodynamics and free-surface flow simulations, thrust and production coefficients of the downstream turbines drop significantly due to the velocity deficit in the wake. By comparing the result between free-surface flow and pure hydrodynamics simulations for the configuration considered here, we find that the free-surface does not affect the upstream turbine but significantly affects the downstream turbine.
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      Numerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4273128
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    contributor authorYan, Jinhui
    contributor authorDeng, Xiaowei
    contributor authorXu, Fei
    contributor authorXu, Songzhe
    contributor authorZhu, Qiming
    date accessioned2022-02-04T14:10:52Z
    date available2022-02-04T14:10:52Z
    date copyright2020/03/12/
    date issued2020
    identifier issn0021-8936
    identifier otherjam_87_6_061001.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4273128
    description abstractWe simulate two back-to-back full-scale tidal turbines using an in-house computational free-surface flow code. We briefly present the mathematical formulation of the computational framework. We first validate the proposed method on a single turbine configuration. A mesh refinement study is conducted to ensure the result is converged. We then quantify the wake effect and free-surface effect on tidal turbine performance by a case study. To investigate the free-surface effect, we perform both pure hydrodynamics and free-surface simulations. The time history of thrust and production coefficients is quantified. In both pure hydrodynamics and free-surface flow simulations, thrust and production coefficients of the downstream turbines drop significantly due to the velocity deficit in the wake. By comparing the result between free-surface flow and pure hydrodynamics simulations for the configuration considered here, we find that the free-surface does not affect the upstream turbine but significantly affects the downstream turbine.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows
    typeJournal Paper
    journal volume87
    journal issue6
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4046317
    page61001
    treeJournal of Applied Mechanics:;2020:;volume( 087 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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