Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
An electrodynamic analogy of the moving surface control mechanism in bluff bodies
Year:2009
Research Areas
  • Fluid mechanics
Information
Abstract
dies. An angular momentum injection scheme is proposed to shift the critical Reynolds number corresponding to the first Hopf bifurcation to higher values. We show that the base suction, wake formation length, absolute instability, and the Karman vortex street are e ectively controlled by the angular momentum injection. An analytical boundary condition is designed to implement the injection. The Navier-Stokes equations, along with the control mechanism, are solved and the resulting base ow has been analyzed by the BiGlobal stability theory. New critical Reynolds numbers have been calculated depending on the control parameters and the geometry considered. Initially a circular cylinder has been considered as a validation case and after it two di erent blu bodies have been also studied. This numerical experiments have been also validated experimentally under the hypothesis that the imposition of a slip velocity boundary condition at the wall can be certainly represented by the operation of a electrohydrodynamic (EHD) actuators. Particle Image Velocimetry (PIV) visualizations and experimental measurements show how the presence of these EHD actuators are able to eliminate completely the vortex shedding in the wake.
International
Si
Congress
Symposium on Global Flow Instability and Control
960
Place
Creta Grecia
Reviewers
Si
ISBN/ISSN
978-84-692-6247-4
Start Date
27/09/2009
End Date
02/10/2010
From page
1
To page
2
Global Flow Instability and Control
Participants
  • Autor: Leo Miguel Gonzalez Gutierrez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Enseñanzas Básicas de la Ingeniería Naval
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)