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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