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Journal Article

Development and Application of a Multipoint Inverse Design Method for Horizontal Axis Wind Turbines

Michael S. Selig and James L. Tangler
Wind Engineering
Vol. 19, No. 2 (1995), pp. 91-105
Published by: Sage Publications, Ltd.
Stable URL: http://www.jstor.org/stable/43749569
Page Count: 15
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Development and Application of a Multipoint Inverse Design Method for Horizontal Axis Wind Turbines
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Abstract

An inverse method for the aerodynamic design of horizontal axis wind turbines has been developed. and a computer program (PROPID) has been written based on the approach. The new inverse approach is a significant improvement over the traditional approach of repeatedly prescribing the blade geometry and then determining the performance through analysis. Instead, with the current method, the desired rotor performance characteristics and blade aerodynamic characteristics can be directly specified from which the corresponding blade geometry is determined. To illustrate the inverse design method, a new 10.5 m blade for use on the stall-regulated three-bladed Micon 108 and Bonus 120 wind turbine generators has been designed to replace the ageing AeroStar 9.06 m blade currently in widespread use on thousands of machines. The design effort primarily focused on improving the blade performance for the Micon 108 machines since they are more numerous than the Bonus 120's. As compared with the AeroStar 9.06 m blade, the improvement in annual energy of the new blade is 13-25% over the average wind speed range 4.47-8.94 m/s (10-20 mph) for the Micon 108. When dirty (i.e., when the leading edge is contaminated with insect debris), the new blade produces 28-53% more annual energy than the AeroStar blade.

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