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Experiments in Fluids

, Volume 52, Issue 1, pp 207–223 | Cite as

Flow structure on a rotating plate

  • C. A. Ozen
  • D. RockwellEmail author
Research Article

Abstract

The flow structure on a rotating plate of low aspect ratio is characterized well after the onset of motion, such that transient effects are not significant, and only centripetal and Coriolis accelerations are present. Patterns of vorticity, velocity contours, and streamline topology are determined via quantitative imaging, in order to characterize the leading-edge vortex in relation to the overall flow structure. A stable leading-edge vortex is maintained over effective angles of attack from 30° to 75°, and at each angle of attack, its sectional structure at midspan is relatively insensitive to Reynolds number over the range from 3,600 to 14,500. The streamline topology, vorticity distribution, and circulation of the leading-edge vortex are determined as a function of angle of attack, and related to the velocity field oriented toward, and extending along, the leeward surface of the plate. The structure of the leading-edge vortex is classified into basic regimes along the span of the plate. Images of these regimes are complemented by patterns on crossflow planes, which indicate the influence of root and tip swirl, and spanwise flow along the leeward surface of the plate. Comparison with the equivalent of the purely translating plate, which does not induce the foregoing flow structure, further clarifies the effects of rotation.

Keywords

Vorticity Particle Image Velocimetry Leeward Side Effective Angle Spanwise Velocity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This investigation was supported by a grant from the Air Force Office of Scientific Research, monitored by Dr. Douglas Smith.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Department of Mechanical Engineering and MechanicsLehigh UniversityBethlehemUSA

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