Lift Limit of Horizontal Axis Wind Turbine

Hai Bo Jiang; Yun Peng Zhao; Zhong Qing Cheng

doi:10.4028/www.scientific.net/AMR.1070-1072.1869

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1070-1072Lift Limit of Horizontal Axis Wind Turbine

Lift Limit of Horizontal Axis Wind Turbine

Abstract:

The lift coefficient of any wind turbine must have highest limit. In this paper, an analytical expression of lift coefficient associated with tip-speed ratio and lift-drag ratio of airfoil of wind turbine with ideal chord has been deduced by integrating along the blade wingspan using the blade element - momentum theory, which can be used for pre-estimating lift coefficient of actual wind turbine in design. Further, considering ideal fluid environment ( the drag coefficient is close to 0 ), an expression of the highest performance of lift only associated with tip-speed ratio has been deduced too, which is the highest boundary of lift coefficient of any actual wind turbine with same tip-speed ratio. The results show that for the wind turbine in steady state, there is a theoretical limit of the lift coefficient, 0.57795, which is the highest boundary that any actual wind turbine can not be crossed; if the tip-speed ratio is greater than 6 and lift-drag ratio less than 200, the lift coefficient is unlikely to exceed 0.2.

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Periodical:

Advanced Materials Research (Volumes 1070-1072)

Pages:

1869-1873

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1869

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Online since:

December 2014

Authors:

Hai Bo Jiang*, Yun Peng Zhao, Zhong Qing Cheng

Keywords:

Highest Performance, Horizontal Axis Wind Turbine, Lift Coefficient, Lift Limit, Lift-Drag Ratio, Tip-Speed Ratio, Wind Energy Utilization

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* - Corresponding Author

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