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Energy generation efficiency and strength coupled design and optimization of wind turbine rotor blades

Xu, Y, Liu, P ORCID: 0000-0003-2158-5442, Penesis, I ORCID: 0000-0003-4570-6034, He, G, Heidarian, A and Ghassemi, H 2019 , 'Energy generation efficiency and strength coupled design and optimization of wind turbine rotor blades' , Journal of Energy Engineering, vol. 145, no. 2 , pp. 1-12 , doi: 10.1061/(ASCE)EY.1943-7897.0000599.

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Abstract

Wind turbine rotor failures have been reported that resulted in substantial damage and cost for maintenance and recovery. This work developed a wind turbine rotor blade design and optimization method to address a coupled energy generation efficiency and blade structural strength design issue, as a generic procedure applicable to both turbine rotors and propellers, in air and water. The optimization procedure was developed for optimum radial blade sectional thickness distribution with a prescribed constant safety factor across the span. While maintaining the required structural strength and integrity of the rotor blades, this procedure is to achieve the following objectives: (1) reduce material use to minimum and (2) obtain the optimum power generation efficiency with the optimum structural strength. A propeller-turbine rotor code coupling aerodynamic and structural properties was developed. For a given blade geometry and chosen material, performance prediction of the instantaneous loading acting on all blade sections and the strength of a local blade section was performed and optimized. A time-domain, three-dimensional unsteady panel method was implemented, developed, and used to perform the optimization. A wind turbine 10 m in diameter from the National Renewable Energy Laboratory (NREL) (Golden, Colorado) was used as a base design example and for optimization based on an extreme wind speed of 100  km/h. The final result achieved a total savings of 18.72% in blade material.

Item Type: Article
Authors/Creators:Xu, Y and Liu, P and Penesis, I and He, G and Heidarian, A and Ghassemi, H
Keywords: wind turbine, aerodynamics of wind turbine, wind turbine blade strength and integrity
Journal or Publication Title: Journal of Energy Engineering
Publisher: Asce-Amer Soc Civil Engineers
ISSN: 0733-9402
DOI / ID Number: 10.1061/(ASCE)EY.1943-7897.0000599
Copyright Information:

Copyright 2019 ASCE

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