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2013 (Vol. 5, Issue: 01)
Article Information:

CFD Simulation of Twin Vertical Axis Tidal Turbines System

Syed Shah Khalid, Zhang Liang and Sheng Qi-hu
Corresponding Author:  Syed Shah Khalid 

Key words:  CFD simulation, hydrodynamic interaction, renewable energy, tidal energy, twin turbine, vertical axis tidal turbine,
Vol. 5 , (01): 233-238
Submitted Accepted Published
May 30, 2012 June 29, 2012 January 01, 2013

As concerns about rising fossil-fuel prices, energy security and climate-change increase, renewable energy can play a vital role in producing local, clean and inexhaustible energy to supply world rising demand for electricity. In this study, hydrodynamic analysis of vertical axis tidal turbine operating side-by-side is numerically analyzed. Two-dimensional numerical modeling of the unsteady flow through the blades of the turbine is performed using ANSYS CFX, hereafter CFX; this is based on a Reynolds-Averaged Navier-Stokes (RANS) model. The purpose is to find an optimal distance between the turbines where interaction effect is minimal and constructive, where the turbines operate more efficiently than stand alone turbine. A transient simulation is done on Vertical Axis Tidal Turbine (VATT) using the Shear Stress Transport Turbulence (SST) model. Main hydrodynamic parameters like torque T, coefficients of performance CP and coefficient of torque CT are investigated. The gap spacing between the turbines has an important role in performance improvement and also in vortex shedding suppression for the flows around two counters rotating systems. The simulation results are validated with Ye and Calisal data. The results of this study prove that the total power output of a twin-turbine system with an optimal layout can be about 24% higher than two times that of a stand-alone turbine. We conclude that the optimally configured counter-rotating twin turbines should be a side-by-side arrangement.
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  Cite this Reference:
Syed Shah Khalid, Zhang Liang and Sheng Qi-hu, 2013. CFD Simulation of Twin Vertical Axis Tidal Turbines System.  Research Journal of Applied Sciences, Engineering and Technology, 5(01): 233-238.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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