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TECHNICAL PAPERS

Spectral Measurements in Transitional Boundary Layers on a Concave Wall Under High and Low Free-Stream Turbulence Conditions

[+] Author and Article Information
Ralph J. Volino

Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402

Terrence W. Simon

Heat Transfer Laboratory, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455

J. Turbomach 122(3), 450-457 (Aug 01, 1997) (8 pages) doi:10.1115/1.1303075 History: Received August 01, 1997
Copyright © 2000 by ASME
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References

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Morkovin, M. V., and Reshotko, E., 1990, “Dialogue on Progress and Issues in Stability and Transition Research,” Laminar Turbulent Transition R. Michel and D. Arnal, eds., Springer-Verlag, Berlin.
Johnson, M. W., and Ercan, A. H., 1997, “Predicting Bypass Transition: A Physical Model Versus Empirical Correlations,” ASME Paper No. 97-GT-475.
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Voke,  P. R., and Yang,  Z., 1995, “Numerical Study of Bypass Transition,” Phys. Fluids, 7, pp. 2256–2264.
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Kim, J., and Simon, T. W., 1991, “Free-Stream Turbulence and Concave Curvature Effects on Heated Transitional Boundary Layer, Vol. I—Final Report,” NASA CR 187150.
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Volino,  R. J., and Simon,  T. W., 1997, “Boundary Layer Transition Under High Free-Stream Turbulence and Strong Acceleration Conditions: Part 1—Mean Flow Results; Part 2—Turbulent Transport Results,” ASME J. Heat Transfer, 119, pp. 420–432.
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Figures

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Velocity time trace showing intermittent flow: high-FSTI case, Station 6, y+=17
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Free-stream u spectra: low-FSTI case
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Free-stream v spectra: low-FSTI case
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Transfer function of u between y+=6 and free stream: low-FSTI case
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Depiction of u caused by large-scale free-stream eddies buffeting the boundary layer: (a) undisturbed profile, (b) profile disturbed by free-stream eddy
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Transfer function of u between y+=35 and free-stream: low-FSTI case
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Free-stream u spectra: high-FSTI case with streamwise acceleration
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Free-stream v spectra: high-FSTI case with streamwise acceleration
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Transfer function of u between y+=5 and free-stream: high-FSTI case with streamwise acceleration
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Transfer function of u between y+=50 and free-stream: high-FSTI case with streamwise acceleration
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Transfer function of v between y+=50 and free-stream: high-FSTI case with streamwise acceleration
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Boundary layer turbulent shear stress spectra at y+=50: high-FSTI case with streamwise acceleration
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Transfer function between −uv and u′2 at y+=50: high-FSTI case with streamwise acceleration

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