Published June 2014
| Submitted
Conference Paper
Open
Dynamic separation on a pitching and surging airfoil as a model for flow over vertical axis wind turbine blades
- Creators
- Dunne, R.
-
McKeon, B. J.
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.
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.Attached Files
Submitted - Dunne_AIAA_2014.pdf
Files
Dunne_AIAA_2014.pdf
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Additional details
- Eprint ID
- 54633
- Resolver ID
- CaltechAUTHORS:20150210-091011617
- GBMF2645
- Gordon and Betty Moore Foundation
- Created
-
2015-02-10Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- GALCIT
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2014-3142