Volume 16, Issue 12 (2-2017)                   Modares Mechanical Engineering 2017, 16(12): 467-478 | Back to browse issues page

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Veisi A A, Shafiei Mayam M H. Investigation of blade rotation direction in two in line turbines using Large Eddy Simulation. Modares Mechanical Engineering 2017; 16 (12) :467-478
URL: http://mme.modares.ac.ir/article-15-7255-en.html
Investigation of blade rotation direction in two in line turbines using Large Eddy Simulation
Amin Allah Veisi1 , Mohammad Hossein Shafiei Mayam * 2
1- PHD student of Mechanical Engineering, Sistan and Baluchestan University
2- Chancellor, Bozorgmehr University Of Qaenat
Abstract:   (5172 Views)
In this study Large Eddy Simulation method has been employed in order to investigate the effects of blade rotation direction of downstream turbine in two co-rotating and counter-rotating configurations. The acquired results are in good agreement with presented experimental data in literatures. Counter-rotating configuration is used in order to investigate the effect of blade rotation on the efficiency of downstream wind turbine. The results show that the efficiency of downstream wind turbine is increased about 4 percent without any change in wind farm layout and type of wind turbines. The upstream wind turbine absorbed a portion of wind energy. Hence stream wise velocity is decreased and lateral velocities are increased in downstream direction. The flow behind the upstream turbine is rotated in same direction with downstream turbine in a counter-rotating configuration. This is why the efficiency of downstream turbine is increased in a counter-rotating configuration. The results of the present study show that streamwise velocity profile is almost identical in both configurations, while, lateral velocities are changed considerably. In other words, a better efficiency of wind farm could be due to the lateral velocities. Hence, the efficiency of wind farm could be increased by decreasing the distance between two consecutive wind turbines in a counter-rotating configuration.
Keywords: Wind turbine, Large Eddy Simulation, turbulence flow, Smagorinsky subgrid-scale model
Full-Text [PDF 4551 kb]   (3146 Downloads)    
Article Type: Research Article | Subject: Turbulance
Received: 2016/09/13 | Accepted: 2016/11/2 | Published: 2016/12/18
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