Analytical/experimental comparison of the axial velocity in trailing vortices

Giuni, M. and Benard, E. (2011) Analytical/experimental comparison of the axial velocity in trailing vortices. In: 49th AIAA Aerospace Sciences Meeting, Orlando FL, USA, 4-7 Jan 2011, (doi: 10.2514/6.2011-990)

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Publisher's URL: http://dx.doi.org/10.2514/6.2011-990

Abstract

The axial velocity of a vortex is a parameter which is known to be strongly related to the vortex breakdown, yet to date a complete description of its physical origins has not been achieved. A series of experiments studying the vortex trailed from a NACA 0015 wing using stereoscopic particle image velocimetry is presented and the axial velocity studied in detail. The problem of centering the instantaneous vector fields is addressed showing a high sensitivity of the results from the centering method which is adopted. It is shown that a strong axial velocity excess exists and a linear relationship between the axial velocity and a circulation parameter of the vortex is shown. The experimental data are compared with the analytical descriptions of the velocity in the centre of a simplified vortex giving new insights of the viscous effects in the development of the axial flow.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Benard, Dr Emmanuel and Giuni, Dr Michea
Authors: Giuni, M., and Benard, E.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Copyright Holders:Copyright © 2011 The Authors
Publisher Policy:Reproduced with the permission of the Authors

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