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. https://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) | |||||||||
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| 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 | |||||||||
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| DOI: | 10.2514/6.2014-3142 | |||||||||
| Record Number: | CaltechAUTHORS:20150210-091011617 | |||||||||
| Persistent URL: | https://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: | 10 Nov 2021 20:36 |
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