An experimental investigation has been carried out on a transitional boundary layer subject to high (initially 9%) freestream turbulence, strong acceleration as high as and strong concave curvature (boundary layer thickness between 2% and 5% of the wall radius of curvature). Mean and fluctuating velocity as well as turbulent shear stress are documented and compared to results from equivalent cases on a flat wall and a wall with milder concave curvature. The data show that curvature does have a significant effect, moving the transition location upstream, increasing turbulent transport, and causing skin friction to rise by as much as 40%. Conditional sampling results are presented which show that the curvature effect is present in both the turbulent and nonturbulent zones of the transitional flow.
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e-mail: mschultz@usna.edu
e-mail: volino@usna.edu
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January 2003
Technical Papers
Effects of Concave Curvature on Boundary Layer Transition Under High Freestream Turbulence Conditions
Michael P. Schultz,
e-mail: mschultz@usna.edu
Michael P. Schultz
Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402
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Ralph J. Volino
e-mail: volino@usna.edu
Ralph J. Volino
Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402
Search for other works by this author on:
Michael P. Schultz
Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402
e-mail: mschultz@usna.edu
Ralph J. Volino
Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402
e-mail: volino@usna.edu
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division July 12, 2001; revised manuscript received July 26, 2002. Associate Editor: K. B. M. Q. Zaman.
J. Fluids Eng. Jan 2003, 125(1): 18-27 (10 pages)
Published Online: January 22, 2003
Article history
Received:
July 12, 2001
Revised:
July 26, 2002
Online:
January 22, 2003
Citation
Schultz, M. P., and Volino, R. J. (January 22, 2003). "Effects of Concave Curvature on Boundary Layer Transition Under High Freestream Turbulence Conditions ." ASME. J. Fluids Eng. January 2003; 125(1): 18–27. https://doi.org/10.1115/1.1522410
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