In this paper, the relationships between the power augmentation of a HAWT due to Mie-type tip vane application and other factors influencing the efficiency of a wind turbine such as the blade aspect ratio, number of blades, blade pitch angle and Reynolds number are investigated. Experiments were carried out in a wind tunnel with an open, 3.6 m diameter, test section. Rotor models included two- and three-blade upwind turbines with four sets of blades with different aspect ratios. With the rotor blades tested, a maximum power augmentation of about 14.5% was achieved due to Mie vane application. The relationships between power augmentation due to the Mie vane and the above factors are investigated. It is found that the application of a tip-mounted Mie vane results in a larger increase in maximum power coefficient for rotors with smaller aspect ratios and for lower wind speeds. Surface oil film and surface tuft visualization methods were used to detect the flow patterns at the blade tip. Addition of the Mie vanes causes significant changes in flow behavior near the blade tip, resulting in additional blade lift.
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e-mail: shimizu@mach.mie-u.ac.jp
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November 2003
Technical Papers
Rotor Configuration Effects on the Performance of a HAWT With Tip-Mounted Mie-Type Vanes
Y. Shimizu,
e-mail: shimizu@mach.mie-u.ac.jp
Y. Shimizu
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
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E. Ismaili,
E. Ismaili
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
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Y. Kamada,
Y. Kamada
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
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T. Maeda
T. Maeda
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
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Y. Shimizu
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
e-mail: shimizu@mach.mie-u.ac.jp
E. Ismaili
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
Y. Kamada
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
T. Maeda
Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho,Tsu, Mie 514, Japan
Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division May 3, 2002; final revision, April 1, 2003. Associate Editor: D. Berg.
J. Sol. Energy Eng. Nov 2003, 125(4): 441-447 (7 pages)
Published Online: November 26, 2003
Article history
Received:
May 3, 2002
Revised:
April 1, 2003
Online:
November 26, 2003
Citation
Shimizu, Y., Ismaili , E., Kamada , Y., and Maeda, T. (November 26, 2003). "Rotor Configuration Effects on the Performance of a HAWT With Tip-Mounted Mie-Type Vanes ." ASME. J. Sol. Energy Eng. November 2003; 125(4): 441–447. https://doi.org/10.1115/1.1621671
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