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Experimental and Numerical Study of the Coanda Effect Used to Reduce Self-Sustained Tones

[+] Author Affiliations
C. Allery

Université de Poitiers, Futuroscope Cedex, France

S. Guérin, A. Hamdouni, A. Sakout

Université de La Rochelle, La Rochelle Cedex, France

Paper No. FEDSM2002-31355, pp. 1191-1196; 6 pages
doi:10.1115/FEDSM2002-31355
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

We present in this paper an experimental and numerical study about the Coanda effect which causes the sudden reattachment of a jet to an inclined plane. This phenomenon induces a large hysteresis loop, which can be used to reduce the noise produced by an airflow crossing two diaphragms in tandem inside a duct. The angle of the inclined wall with horizontal plane and the flow velocity are the two main parameters studied here. With the aim of doing optimal control, we propose to construct for this flow configuration a low-dimensional dynamical system with a basis issued from a Proper Orthogonal Decomposition.

Copyright © 2002 by ASME

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