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Boundary-layer transition on a rotating cone in still fluid

Published online by Cambridge University Press:  20 April 2006

R. Kobayashi  and
H. Izumi
R. Kobayashi
Affiliation:
Institute of High Speed Mechanics, Tohoku University, Sendai, Japan
H. Izumi
Affiliation:
Asahi Glass Co. Ltd, Yokohama, Japan
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Abstract

A linear stability analysis and experiments were carried out for the laminar–turbulent transition of three-dimensional incompressible boundary layers induced on the surface of a cone rotating around the axis of symmetry with constant angular speed in still fluid. Five cones having total angle of 30°–150° were tested. The results show that the critical and transition Reynolds numbers, the direction of spiral vortices appearing in the transition region and their number on a cone increase as the cone angle is increased, and they tend to the values for the case of a rotating disk. Flow visualizations were made for the transitional process and also for cross-sectional flows of spiral vortices.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 127 , February 1983 , pp. 353 - 364
Copyright
© 1983 Cambridge University Press

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