This study analyzes the predicted flow over a NACA 0012 airfoil at varying angles of attack and three different Reynolds numbers. The ability of three different turbulence models to predict boundary layer separation and transition behavior is investigated. Particular interest is paid to prediction of the separation bubble that develops near the leading edge of the airfoil suction surface prior to stall. The FLUENT CFD solver was used to simulate turbulent airflow over the airfoil. The three turbulence models include the standard and realizable forms of the k-ε model, available in FLUENT, as well as a recently developed transition-sensitive k-ω model that was implemented into the solver using user-defined functions. By employing the new, transition-sensitive model, computed properties of the flow field were found to be closer to experimental data than results produced by utilizing built-in turbulence models. Most importantly, the new, transition-sensitive model predicts the occurrence of the separation bubble, which the other models are unable to predict. The new model also clearly reproduces the laminar, transitional, and turbulent flow that occurs over the airfoil.
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ASME/JSME 2007 5th Joint Fluids Engineering Conference
July 30–August 2, 2007
San Diego, California, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4288-6
PROCEEDINGS PAPER
CFD Prediction of Boundary Layer Transition and Separation on an Airfoil at Varying Angle of Attack
Nicole M. Wolgemuth,
Nicole M. Wolgemuth
Mississippi State University, Mississippi State, MS
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D. Keith Walters
D. Keith Walters
Mississippi State University, Mississippi State, MS
Search for other works by this author on:
Nicole M. Wolgemuth
Mississippi State University, Mississippi State, MS
D. Keith Walters
Mississippi State University, Mississippi State, MS
Paper No:
FEDSM2007-37111, pp. 21-28; 8 pages
Published Online:
March 30, 2009
Citation
Wolgemuth, NM, & Walters, DK. "CFD Prediction of Boundary Layer Transition and Separation on an Airfoil at Varying Angle of Attack." Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 1: Symposia, Parts A and B. San Diego, California, USA. July 30–August 2, 2007. pp. 21-28. ASME. https://doi.org/10.1115/FEDSM2007-37111
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