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TECHNICAL PAPERS

Prediction of Transitional Heat Transfer Characteristics of Wake-Affected Boundary Layers

[+] Author and Article Information
K. Kim, M. E. Crawford

Mechanical Engineering Department, The University of Texas at Austin, Austin, TX 78712

J. Turbomach 122(1), 78-87 (Feb 01, 1999) (10 pages) doi:10.1115/1.555430 History: Received February 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Development of turbulent strips on the wake-affected surface
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Convection of turbulent strips and free-stream velocity defect due to the wake-passing
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Intermittent function for the transition model as a function of time
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Time-dependent variation of displacement thickness and friction coefficient in oscillating turbulent boundary layer: symbols show the measurements by Parikh et al. 22; solid lines show the computations
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Modeled free-stream velocity defects for case 3 using Gaussian distribution; symbols show the measurements at y=15 mm by Liu and Rodi 4
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Time-resolved variation of boundary layer parameters for case 3 of the measurements by Liu and Rodi 4; symbols show the measurements; solid lines show the predictions with free-stream velocity defect and dotted lines without free-stream velocity defect
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Periodic fluctuation of ensemble-averaged boundary layer velocity for case 3 of the measurements by Liu and Rodi 4; symbols show the measurements; solid lines show the predictions with free-stream velocity defect and dotted lines without free-stream velocity defect
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Profiles of rms velocity of periodic fluctuation for case 3 of the measurements by Liu and Rodi 4; symbols show the measurements; solid lines show the predictions with free-stream velocity defect and dotted lines without free-stream velocity defect
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Predicted velocity defect contours for case 3 of the measurements by Liu and Rodi 4
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Free-stream velocity distributions from the measurements by Funazaki et al. 6
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Stanton number variations for the cases of no wakes: symbols show the measurements by Funazaki et al. 6; solid lines show the steady boundary layer predictions
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Time-averaged Stanton number distributions for the cases of normal rotation; symbols show the measurements of Funazaki et al. 6 (•: no wake, ○: S=1.88, ▵: S=2.83, □: S=5.65, and ▴: fully turbulent); solid lines are the corresponding time-resolved predictions for the cases of wake-passing; dotted lines are the predictions of the steady superposition model for the corresponding wake-passing cases (Eq. (13))
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Comparison of predicted time-averaged Intermittency factor with the measurements 6 for high acceleration cases
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Wake and surface interaction for normal and reverse rotations of wake-passing (adapted from 23)
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Time-averaged Stanton number distributions for the cases of reverse rotation: symbols show the measurements of Funazaki et al. 6 (•: no wake, ○: S=1.88,▵:S=2.83, □: S=5.65, and ▴: fully turbulent); solid lines show the corresponding time-resolved predictions for the cases of wake-passing.
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Time-resolved variations of the boundary layer parameters: (a) normal rotation and (b) reverse rotation; symbols show the measurements by Funazaki and Kitazawa 24; solid lines show the time-resolved predictions

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