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Laminar boundary-layer transition on a heated underwater body

Published online by Cambridge University Press:  20 April 2006

Gerald C. Lauchle  and
G. B. Gurney
Gerald C. Lauchle
Affiliation:
The Pennsylvania State University, Applied Research Laboratory, Post Office Box 30, State College, PA 16804
G. B. Gurney
Affiliation:
The Pennsylvania State University, Applied Research Laboratory, Post Office Box 30, State College, PA 16804
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Abstract

A large (3.05 m long × 0.32 m diameter) heated-surface, axisymmetric body, designed for transition research in a 1.22 m diameter water tunnel is described. Boundary-layer transition data are presented as functions of the heating power supplied to the body and the total concentration of free-stream particulate matter in the water. Body surface temperatures range from 0 to 25°C over the ambient water temperature, and the total heat supplied ranges from 0 to 93.3 kW. Transition-arclength Reynolds numbers are found to vary from 4.5 × 106 for the body operating cold to 3.64 × 107 for the maximum heat level considered. The concentration of free-stream particles is shown to affect the transition Reynolds number. These particles range in diameter from 10 to 70 μm and their concentration ranges from less than 5 to 198 particles per cm3. The decrease in transition Reynolds number due to to the higher concentration of particles is of order 30%.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 144 , July 1984 , pp. 79 - 101
Copyright
© 1984 Cambridge University Press

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