Abstract
The flow about an S809 airfoil with two aerodynamic control devices including a vented aileron and a spoiler-flap was investigated with the compressible and incompressible Navier-Stokes equations. The one-equation turbulence models of Baldwin-Barth and Spalart-Allmaras were used to perform fully turbulent flow computations. Flow conditions included Mach number of 0.13, Reynolds number of 1million based on airfoil chord and angles of attach of 0, 6, 12, 27, 35, and 45 degrees. Control deflections for this study were 60 degrees, 90 degrees for the spoiler-flap and -60 deg., -90 deg. for the vented aileron. Most of the selected angles of attack and control deflections are representative of horizontal axis wind turbine conditions during aerodynamic braking. At these conditions theflow about the airfoil and control surface is unsteady and includes regions of extensive flow separation. The computational results were found to be in good qualitative agreement with the experimental data. In many cases, however, the magnitudes of the computed aerodynamic coefficients did not correlate well with the experiment.
Original language | American English |
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Pages | 100-112 |
Number of pages | 13 |
State | Published - 1998 |
Event | 1998 ASME Wind Energy Symposium Technical 36th AIAA Aerospace Sciences Meeting and Exhibit - Reno, Nevada Duration: 12 Jan 1998 → 15 Jan 1998 |
Conference
Conference | 1998 ASME Wind Energy Symposium Technical 36th AIAA Aerospace Sciences Meeting and Exhibit |
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City | Reno, Nevada |
Period | 12/01/98 → 15/01/98 |
Bibliographical note
Work performed by Wichita State University, Wichita, KansasNREL Publication Number
- NREL/CP-25537