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Dynamic separation on a pitching and surging airfoil as a model for flow over vertical axis wind turbine blades

Dunne, R. and McKeon, B. J. (2014) Dynamic separation on a pitching and surging airfoil as a model for flow over vertical axis wind turbine blades. In: 32nd AIAA Applied Aerodynamics Conference, June 16-20, 2014, Atlanta, GA. http://resolver.caltech.edu/CaltechAUTHORS:20150210-091011617

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Abstract

Vertical axis wind turbine (VAWT) blades undergo dynamic separation due to the large angle of attack variation they experience during a turbine rotation. The flow over a single blade was modeled using a sinusoidally pitching and surging airfoil in a constant free stream flow at a mean chord Reynolds number of 10^5. Two-dimensional, time resolved velocity fields were acquired using particle image velocimetry (PIV). Vorticity contours were used to visualize shear layer and vortex activity. A low order model of dynamic separation was developed using Dynamic Mode Decomposition (DMD). A primary and secondary dynamic separation mode were identified as the critical drivers for the unsteady flow field.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
http://arc.aiaa.org/doi/abs/10.2514/6.2014-3142PublisherArticle
http://dx.doi.org/10.2514/6.2014-3142DOIArticle
ORCID:
AuthorORCID
McKeon, B. J.0000-0003-4220-1583
Additional Information:©2014 AIAA. This work was supported by the Gordon and Betty Moore Foundation through grant GBMF#2645 to the California Institute of Technology. The authors thank Professor Peter J. Schmid for his assistance in implementing the dynamic mode decomposition algorithm. Professor Morteza Gharib for the use of the free surface water channel facility, Hsieh-Chen Tsai and Professor Tim Colonius for discussion on the Coriolis effect and Professor John Dabiri for his insight from VAWT field research.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationGBMF2645
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2014-3142
Record Number:CaltechAUTHORS:20150210-091011617
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150210-091011617
Official Citation:Dynamic separation on a pitching and surging airfoil as a model for flow over vertical axis wind turbine blades Reeve Dunne and Beverley J. McKeon 32nd AIAA Applied Aerodynamics Conference. June 2014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54633
Collection:CaltechAUTHORS
Deposited By: Jamie Sei
Deposited On:10 Feb 2015 17:56
Last Modified:21 Sep 2016 22:21

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