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http://dx.doi.org/10.1016/j.ijnaoe.2017.10.006

Design, test and numerical simulation of a low-speed horizontal axis hydrokinetic turbine  

Tian, Wenlong (School of Marine Science and Technology, Northwestern Polytechnical University)
Mao, Zhaoyong (School of Marine Science and Technology, Northwestern Polytechnical University)
Ding, Hao (School of Mechanic and Electronic Engineering, Henan University of Technology)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.10, no.6, 2018 , pp. 782-793 More about this Journal
Abstract
A small-scale horizontal axis hydrokinetic turbine is designed, manufactured and studied both experimentally and numerically in this study. The turbine is expected to work in most of China's sea areas where the ocean current velocity is low and to supply electricity for remote islands. To improve the efficiency of the turbine at low flow velocities, a magnetic coupling is used for the non-contacting transmission of the rotor torque. A prototype is manufactured and tested in a towing tank. The experimental results show that the turbine is characterized by a cut-in velocity of 0.25 m/s and a maximum power coefficient of 0.33, proving the feasibility of using magnetic couplings to reduce the resistive torque in the transmission parts. Three dimensional Computational Fluid Dynamics (CFD) simulations, which are based on the Reynolds Averaged Navier-Stokes (RANS) equations, are then performed to evaluate the performance of the rotor both at transient and steady state.
Keywords
Hydrokinetic turbine; Tidal turbine; Ocean current turbine; Experiment; CFD; Magnetic coupling;
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