Effect of a Splitter Plate on the Dynamics of a Vortex Pair

Creators: Rabinovitch, Jason; Brion, Vincent; Blanquart, Guillaume

Abstract

An experimental and numerical study was performed to investigate the behavior of a counter-rotating vortex pair as well as a single vortex in the vicinity of a wall. A wind tunnel with two NACA0012 profiles mounted vertically with an optional splitter plate in the center and a 3D PIV system were used to experimentally study the interactions between two counter-rotating vortices, as well as the interactions between a vortex and a wall. Many fundamental differences were found between the two configurations, which promote the growth of the Crow instability in the two vortex configuration, but not in the one vortex/wall configuration. The numerical results obtained re-enforced the experimental results, and emphasize the fundamental physical differences between the two configurations. While modeling a vortex wall system with an image vortex may give correct integral results for loads experienced by blades, this model does not accurately describe the downstream dynamics of the vortex system.

Additional Information

© 2011 by Jason Rabinovitch. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. J. Rabinovitch would like to thank the Dual Masters Program between the California Institute of Technology and Ecole Polytechnique, and the Partner University Fund for funding him while performing the experimental component of this research. Also thank you to the members of ONERA DAFE, Meudon, for all of their help with the experiments and the post-treatment of the experimental data.

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