The influence of turbulence model and two and three-dimensional domain selection on the simulated performance characteristics of vertical axis tidal turbines

RENEWABLE ENERGY

卷:105

Article

Marsh, Philip¹  Ranmuthugala, Dev²  Penesis, Irene¹  Thomas, Giles³ 

[1] Univ Tasmania, Australian Maritime Coll, Natl Ctr Maritime Engn & Hydrodynam, Locked Bag 1395, Launceston, Tas 7250, Australia

[2] Univ Tasmania, Australian Maritime Coll, Natl Ctr Ports & Shipping, Locked Bag 1397, Launceston, Tas 7250, Australia

[3] UCL, UCL Mech Engn, Torrington Pl, London WC1E 7JE, England

关键词: Vertical axis turbine;    Computational fluid dynamics;    Turbulence model;    Computational domain;    Laminar-to-turbulent transition;   

DOI  :  10.1016/j.renene.2016.11.063

来源: Elsevier

【 摘 要 】

The influence of Computational Fluid Dynamics (CFD) modeling techniques on the accuracy of fixed pitch vertical axis turbine power output predictions was investigated. Using Two-Dimensional (2D) and Three-Dimensional (3D) models, as well as the Baseline-Reynolds Stress Model (BSL-RSM) and the k-omega Shear Stress Transport (k-omega SST) model in its fully turbulent and laminar-to-turbulent formulation, differences in power output modeling accuracy were evaluated against experimental results from literature. The highest correlation was found using a 3D domain model that fully resolved the boundary layer combined with the k-omega SST laminar-to-turbulent model. The turbulent 3D fully resolved boundary layer k-omega SST model also accurately predicted power output for most rotational rates, at a significantly reduced computational cost when compared to its laminar-to-turbulent formulation. The 3D fully resolved BSL-RSM model and 3D wall function boundary layer k-omega SST model were found to poorly simulate power output. Poor output predictions were also obtained using 2D domain k-omega SST models, as they were unable to account for blade tip and strut effects. The authors suggest that 3D domain fully turbulent k-omega SST models with fully resolved boundary layer meshes are used for predicting turbine power output given their accuracy and computational efficiency. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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