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Efficiency improvement of straight-bladed vertical-axis wind turbines with an upstream deflector

Kim, Daegyoum and Gharib, Morteza (2013) Efficiency improvement of straight-bladed vertical-axis wind turbines with an upstream deflector. Journal of Wind Engineering and Industrial Aerodynamics, 115 . pp. 48-52. ISSN 0167-6105 . https://resolver.caltech.edu/CaltechAUTHORS:20130521-084059314

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Abstract

The effect of an upstream flat deflector on the power output of two counter-rotating straight-bladed vertical-axis wind turbines (VAWTs) was investigated experimentally. Although many studies on the deflector effect have been done for a drag-based Savonius VAWT, there is little information on the performance of a lift-based VAWT with a deflector. If a flat vertical plate is normal to the free-stream wind direction, the local wind speed outside the near-wake region of the plate is larger than the free-stream velocity. Thus, when each of the counter-rotating turbines is positioned outside the near-wake region, its power output increases significantly. The power output increase with the deflector installed is dependent on the width and height of the deflector and the turbine position relative to the deflector.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/ 10.1016/j.jweia.2013.01.009 DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0167610513000354PublisherUNSPECIFIED
ORCID:
AuthorORCID
Gharib, Morteza0000-0002-2204-9302
Additional Information:© 2013 Elsevier Ltd. Received 22 June 2012; Received in revised form 19 December 2012; Accepted 16 January 2013; Available online 26 February 2013. This research was supported by the grant of Gordon and Betty Moore Foundation.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:Vertical-axis wind turbine; Wind energy; Efficiency; Deflector; Straight blade
Record Number:CaltechAUTHORS:20130521-084059314
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130521-084059314
Official Citation:Daegyoum Kim, Morteza Gharib, Efficiency improvement of straight-bladed vertical-axis wind turbines with an upstream deflector, Journal of Wind Engineering and Industrial Aerodynamics, Volume 115, April 2013, Pages 48-52, ISSN 0167-6105, 10.1016/j.jweia.2013.01.009.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38590
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 May 2013 16:54
Last Modified:03 Oct 2019 04:58

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