Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.13091/1504
Title: | Numerical evolution of unsteady wake characteristics of H-type Darrieus Hydrokinetic Turbine for a hydro farm arrangement | Authors: | Yağmur, Sercan Köse, Faruk |
Keywords: | Cfd Darrieus Turbine Hydrokinetic Naca Foil Power Coefficient Wake Region Vertical-Axis Wind Cfd Simulations Tidal Turbines Aerodynamic Performance Turbulence Models Eddy Simulation Flow Rotor Dynamics Angle |
Publisher: | ELSEVIER SCI LTD | Abstract: | In this study, the CFD method is carried out in the wake region of an H-type Darrieus hydrokinetic turbine. The hydrodynamic investigation was examined with symmetric and non-symmetric foil shape to maximize output power coefficient and wake recovery. The SST (Shear Stress Transport) k-? turbulence model was used on 2-D and 3-D unsteady numerical analyses. The obtained power coefficients from 2-D and 3-D analyses at different Tip Speed Ratios (TSR) were validated by comparing with the experimental data from the literature. As the experimental study, the maximum power coefficient was obtained at TSR=1.05 for a 3-D analysis of the NACA0018 foil configuration of the hydrokinetic turbine. It is found that the results of 2-D and 3-D calculated by the SST k-? are in good agreement with the experimental data in terms of power coefficients curve trend at investigated TSR range between 0.9?1.4. The difference between the power coefficient results of 3-D and experimental data varies between 1.8-11% ranges. The performance and flow characteristics of the wake region were also compared in detail for different foil by CFD. Therefore, the SST k-? model can be preferred as an acceptable model to analyze the performance and flow characteristics of hydrokinetic turbines. | URI: | https://doi.org/10.1016/j.apor.2021.102582 https://hdl.handle.net/20.500.13091/1504 |
ISSN: | 0141-1187 1879-1549 |
Appears in Collections: | Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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1-s2.0-S0141118721000596-main.pdf Until 2030-01-01 | 18.49 MB | Adobe PDF | View/Open Request a copy |
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