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Effect of Number of Blades and Blade Chord Length on the Performance of Darrieus Wind Turbine
Current Issue
Volume 2, 2015
Issue 1 (January)
Pages: 16-25   |   Vol. 2, No. 1, January 2015   |   Follow on         
Paper in PDF Downloads: 156   Since Aug. 28, 2015 Views: 2473   Since Aug. 28, 2015
Authors
[1]
Taher G. Abu-El-Yazied, Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.
[2]
Ahmad M. Ali, Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.
[3]
Mahdi S. Al-Ajmi, Department of Production Engineering Technologies, College of Technological Studies, PAAET, Kuwait.
[4]
Islam M. Hassan, Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.
Abstract
In this article we will go through some parameters like number of blades and blade chord length that influencing the efficiency of straight Darrieus wind turbines. For this purpose, twelve models created with different number of blades and blade chord lengths to study there effect on the performance of Darrieus wind turbine. Two dimensional Computational fluid dynamics (CFD) analyses have been performed on a straight-bladed Darrieus-type rotor. After describing the computational model, a complete campaign of simulations using K-ε turbulence model is chosen to perform the transient simulations and multiple reference frame (MRF) model capability of a (CFD) solver is used to express the dimensionless form of power output of the wind turbine as a function of the wind free stream velocity and the rotor’s rotational speed for a two, three, four and six-bladed architecture characterized by a NACA 0021 airfoil. It was found that, max power coefficient and its corresponding tip speed ratio were obtained at number of blades equal two and increase in power coefficient related to castelli wind turbine by 3.35%. Increasing in blade chord length increase the power coefficient till a certain limit after which power coefficient was dramatically decreased due to increase in solidity and decreasing corresponding tip speed ratio. Both torque ripple factor and normal force on turbine blade were decreased with increasing of the number of blades and decreasing the blade chord length.
Keywords
Darrieus, Number of Blades, Blade Chord Length and Solidity
Reference
[1]
D. Berg, P. Klimas, and W. Stephenson, "Aerodynamic design and initial performance measurements for the Sandia 34-m diameter vertical-axis wind turbine," in Ninth ASME Wind Energy Symposium, 1990, p. 85.
[2]
J. German, "The end of an era: Sandia’s 17-meter Vertical Axis Wind Turbine comes down after two decades, Sandia Lab News 1997," LN11-21-971997.
[3]
M. H. A. Mohamed, "Design optimization of savonius and wells turbines," Ottovon-Guericke University Magdeburg, 2011.
[4]
P. Musgrove, "Wind energy conversion: recent progress and future prospects," Solar & wind technology, vol. 4, pp. 37-49, 1987.
[5]
T. J. Price, "UK large-scale wind power programme from 1970 to 1990: the Carmarthen Bay experiments and the musgrove vertical-axis turbines," Wind Engineering, vol. 30, pp. 225-242, 2006.
[6]
S. Li and Y. Li, "Numerical study on the performance effect of solidity on the straight-bladed vertical axis wind turbine," in Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific, 2010, pp. 1-4.
[7]
I. Paraschivoiu, Wind turbine design: with emphasis on Darrieus concept: Presses inter Polytechnique, 2002.
[8]
A. Tirkey, Y. Sarthi, K. Patel, R. Sharma, and P. K. Sen, "Study on the effect of blade profile, number of blade, Reynolds number, aspect ratio on the performance of vertical axis wind turbine." International Journal of Science, Engineering and Technology Research (IJSETR), Volume 3, Issue 12, December 2014.
[9]
M. R. Castelli, S. De Betta, and E. Benini, "Effect of Blade Number on a Straight-Bladed Vertical-Axis Darreius Wind Turbine," World Academy of Science, Engineering and Technology, vol. 61, pp. 305-3011, 2012.
[10]
P. Sabaeifard, H. Razzaghi, and A. Forouzandeh, "Determination of Vertical Axis Wind Turbines Optimal Configuration through CFD Simulations," in 2012 International Conference on Future Environment and Energy IPCBEE, 2012.
[11]
M. R. Castelli, G. Ardizzon, L. Battisti, E. Benini, and G. Pavesi, "Modeling strategy and numerical validation for a Darrieus vertical axis micro-wind turbine," in ASME 2010 International Mechanical Engineering Congress and Exposition, 2010, pp. 409-418.
[12]
M. Raciti Castelli, A. Englaro, and E. Benini, "The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD," Energy, vol. 36, pp. 4919-4934, 2011.
[13]
H. N. D. Taher G. Abu-El-Yazied, Ahmad M. Ali and Islam M. Hassan, "Investigation of the Aerodynamic Performance of Darrieus Vertical Axis Wind Turbine," IOSR Journal of Engineering (IOSRJEN) vol. 04, pp. 18-29, May. 2014.
[14]
I. Fluent, "FLUENT 6.3 user’s guide," Fluent documentation, 2006.
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