Saravanan P. This email address is being protected from spambots. You need JavaScript enabled to view it.1, Parammasivam K. M.2 and Selvi Rajan S.3

1Department of Aeronautical Engineering, Tagore Engineering College, Chennai 600048, India
2Department of Aerospace Engg, MIT, Anna University, Chennai 600044, India
3Wind Engineering Laboratory, CSIR-Structural Engg Research Centre, Chennai 600113, India


 

Received: January 10, 2012
Accepted: September 10, 2012
Publication Date: June 1, 2013

Download Citation: ||https://doi.org/10.6180/jase.2013.16.2.07  


ABSTRACT


The present study explores the possibility of increasing the efficiency of the small horizontal axis wind turbine rotor by adding winglets at the tip of the blade. The effects of changing the winglet configuration with the blade on the power performance of small wind turbine rotor models were investigated experimentally. The blades with four different configurations of winglets are fabricated using Glass Fibre Reinforced Plastic materials and are used for the study. Experiments were conducted for all the rotor models with and without load conditions in the wind tunnel for various conditions. The power output is measured for the rotor models with load conditions. The maximum power coefficient obtained for an effective winglet configuration is about 0.43. It is observed that presence of winglet at the tip of the wind turbine blade will improve the power coefficient for low wind speed regions. It is recommended that the smaller curvature radius with sufficient winglet height added to the wind turbine rotor captures more wind energy in low wind speed region as against wind turbine rotors without winglets.


Keywords: Wind Turbine Rotor, Winglets, Rotation Rates, Tip Speed Ratio, Power Coefficient


REFERENCES


  1. [1] Martin, O. L. Hansen., Aerodynamics of Wind Turbines, 2nd ed., Earthscan USA, p. 181 (2008).
  2. [2] Shane, M. and Jason G., “Wind Tunnel Analysis of a Counter-Rotating Wind Turbine,” Proc. of ASEE GSW Annual Conference 2009, Texas USA (2009).
  3. [3] Betz, A., Wind Energy and Their Utilization by Wind Mills, Vandenhoekk and Rupprecht, Goettingen, Germany (1926).
  4. [4] Van Bussel, A., “Momentum Theory for Winglets on Horizontal Axis Wind Turbine Rotors and Some Comparison with Experiments,” Proc. of 4th IEA Symposium on Aerodynamics of Wind Turbines, Rome, Italy, pp. 118 (1990).
  5. [5] Mac, G. and Jeppe, J., “Determination of the Maximum Aerodynamic Efficiency of Wind Turbine Rotors with Winglets,” J. Physics: Conference Series, Vol. 75, p. 12 (2007). doi: 10.1088/1742-6596/75/1/ 012006
  6. [6] Whitcomb, R., A Design Approach and Selected Wind-Tunnel Results at High Subsonic Speeds for Wing-Tip Mounted Winglets, NASA TN D-8260, Washington USA (1976).
  7. [7] Peter, M., “Winglet Design for Sailplanes,” Free Flight, Vol. 2, No. 8, ISSN 0827-2557, Retrieved 2006-01-07, Apr/May (1992). Information on: http:// www.soaridaho.com/Schreder/Technical/Winglets/ Masak.htm.
  8. [8] Dreese, J., Aero Basics and Designfoil, User guide, European Institute of Education, Capitola, California USA (2000).
  9. [9] Jeppe, J. and Sørensen, N. N., Aerodynamic Investigation of Winglets on Wind Turbine Blades Using CFD, Roskilde, Denmark: Risø-R-1543 (EN), Risø National Laboratory, p. 1, Denmark (2006).
  10. [10] Vardar, A. and Eker, B., “Principle of Rotor Design for Horizontal Axis Wind Turbines,” Jl. of App. Sci., Vol. 6, No. 7, pp. 15271533 (2006). doi: 10.3923/jas. 2006.1527.1533


    
 

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