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Ponencias en congresos:
An electrodynamic analogy of the moving surface control mechanism in bluff bodies
Año:2009
Áreas de investigación
  • Mecánica de fluidos
Datos
Descripción
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.
Internacional
Si
Nombre congreso
Symposium on Global Flow Instability and Control
Tipo de participación
960
Lugar del congreso
Creta Grecia
Revisores
Si
ISBN o ISSN
978-84-692-6247-4
DOI
Fecha inicio congreso
27/09/2009
Fecha fin congreso
02/10/2010
Desde la página
1
Hasta la página
2
Título de las actas
Global Flow Instability and Control
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Leo Miguel Gonzalez Gutierrez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Enseñanzas Básicas de la Ingeniería Naval
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