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Energies 2015, 8(6), 5319-5337; doi:10.3390/en8065319

Upgrading a Shrouded Wind Turbine with a Self-Adaptive Flanged Diffuser

1
Department of Aeronautics and Astronautics, Engineering School, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
2
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 10 April 2015 / Revised: 20 May 2015 / Accepted: 26 May 2015 / Published: 3 June 2015
(This article belongs to the Collection Wind Turbines)

Abstract

In this paper, a self-adaptive flange is proposed for the wind turbine shrouded by a flanged diffuser to reduce the wind loads acting on the flanged diffuser at high wind velocities. The self-adaptive flange can maintain the advantages of the flanged diffuser at wind velocities lower than the rated velocity and reduce the wind loads acting on the diffuser and blades at higher wind velocities. Numerical analyses of fluid-structure interactions are carried out to investigate the flow field around the diffuser with a self-adaptive flange and the variation of wind load acting on the diffuser due to the reconfiguration of the self-adaptive flange at various wind velocities. Numerical results show that the wind load acting on the total flanged diffuser can be reduced by about 35% at 60 m/s due to the reconfiguration of the self-adaptive flange. View Full-Text
Keywords: wind turbine; self-adaptive flange; diffuser; drag reduction; fluid-structure interaction wind turbine; self-adaptive flange; diffuser; drag reduction; fluid-structure interaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hu, J.-F.; Wang, W.-X. Upgrading a Shrouded Wind Turbine with a Self-Adaptive Flanged Diffuser. Energies 2015, 8, 5319-5337.

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