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Unsteady vortex flows produced by trailing edge articulation / Huyer, Stephen A. in Transactions of the ASME . Journal of fluids engineering, Vol. 130 N° 3 (Mars 2008) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 3 (Mars 2008) . - 7 p. Titre : Unsteady vortex flows produced by trailing edge articulation Type de document : texte imprimé Auteurs : Huyer, Stephen A., Auteur ; David Beal, Auteur ; Daniel Macumber, Auteur Année de publication : 2009 Article en page(s) : 7 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Flow  (dynamics);  wakes;  vortices;  light  trucks;  measurement;  vortex  flow;  laser  doppler  anemometry;  stators;  particulate  matter;  blades;  noise  (sound);  drag  (fluid  dynamics) Résumé : The unsteady vortex flows produced by biologically inspired tail articulation are investigated. The application is to provide active means of reducing tonal noise due to upstream wake interaction with downstream propellers on underwater vehicles. By reducing the wake velocity defect, the periodic unsteady propeller blade pressure fluctuations that are the source of the noise should be reduced. Accordingly, experiments to measure the flows produced by an upstream stator fitted with a movable trailing edge were carried out in a water tunnel for Reynolds numbers in the range 75,000 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27301 [...] [article] Unsteady vortex flows produced by trailing edge articulation [texte imprimé] / Huyer, Stephen A., Auteur ; David Beal, Auteur ; Daniel Macumber, Auteur . - 2009 . - 7 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 3 (Mars 2008) . - 7 p. Mots-clés : Flow  (dynamics);  wakes;  vortices;  light  trucks;  measurement;  vortex  flow;  laser  doppler  anemometry;  stators;  particulate  matter;  blades;  noise  (sound);  drag  (fluid  dynamics) Résumé : The unsteady vortex flows produced by biologically inspired tail articulation are investigated. The application is to provide active means of reducing tonal noise due to upstream wake interaction with downstream propellers on underwater vehicles. By reducing the wake velocity defect, the periodic unsteady propeller blade pressure fluctuations that are the source of the noise should be reduced. Accordingly, experiments to measure the flows produced by an upstream stator fitted with a movable trailing edge were carried out in a water tunnel for Reynolds numbers in the range 75,000 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27301 [...]