Study of a pseudo-empirical model approach to characterize plasma actuators

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The use of plasma actuators is a recent technology that imposes a localized electric force that is used to control air flows. A suitable representation of actuation enables to undertake plasma actuators optimization, to design flow-control strategies, or to analyse the flow stabilization that can be...

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Autores principales: Bermudez, M.M., Sosa, R., Grondona, D., Márquez, A., Kelly, H., Artana, G.
Formato: Documento de conferencia publishedVersion
Publicado: 2011
Materias:
Actuators
Air
Boundary conditions
Boundary layers
Dielectric properties
Velocity
Velocity distribution
Flow behaviours
Flow Stabilization
Numerical experiments
Numerical results
Plasma actuation
Problem description
Schlieren techniques
Thin boundary layers
Navier Stokes equations
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17426588_v296_n1_p_Bermudez
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v296_n1_p_Bermudez_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_17426588_v296_n1_p_Bermudez_oai
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spelling I28-R145-paper_17426588_v296_n1_p_Bermudez_oai2020-10-19 Bermudez, M.M. Sosa, R. Grondona, D. Márquez, A. Kelly, H. Artana, G. 2011 The use of plasma actuators is a recent technology that imposes a localized electric force that is used to control air flows. A suitable representation of actuation enables to undertake plasma actuators optimization, to design flow-control strategies, or to analyse the flow stabilization that can be attained by plasma forcing. The problem description may be clearly separated in two regions. An outer region, where the fluid is electrically neutral, in which the flow is described by the Navier-Stokes equation without any forcing term. An inner region, that forms a thin boundary layer, where the fluid is ionized and electric forces are predominant. The outer limit of the inner solution becomes the boundary condition for the outer problem. The outer problem can then be solved with a slip velocity that is issued from the inner solution. Although the solution for the inner problem is quite complex it can be contoured proposing pseudo-empirical models where the slip velocity of the outer problem is determined indirectly from experiments. This pseudo-empirical model approach has been recently tested in different cylinder flows and revealed quite adapted to describe actuated flow behaviour. In this work we determine experimentally the influence of the duty cycle on the slip velocity distribution. The velocity was measured by means of a pitot tube and flow visualizations of the starting vortex (i.e. the induced flow when actuation is activated in a quiescent air) have been done by means of the Schlieren technique. We also performed numerical experiments to simulate the outer region problem when actuation is activated in a quiescent air using a slip velocity distribution as a boundary condition. The experimental and numerical results are in good agreement showing the potential of this pseudo-empirical model approach to characterize the plasma actuation. Fil:Grondona, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Márquez, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kelly, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_17426588_v296_n1_p_Bermudez info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J. Phys. Conf. Ser. 2011;296(1) Actuators Air Boundary conditions Boundary layers Dielectric properties Velocity Velocity distribution Flow behaviours Flow Stabilization Numerical experiments Numerical results Plasma actuation Problem description Schlieren techniques Thin boundary layers Navier Stokes equations Study of a pseudo-empirical model approach to characterize plasma actuators info:eu-repo/semantics/conferenceObject info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v296_n1_p_Bermudez_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Actuators
Air
Boundary conditions
Boundary layers
Dielectric properties
Velocity
Velocity distribution
Flow behaviours
Flow Stabilization
Numerical experiments
Numerical results
Plasma actuation
Problem description
Schlieren techniques
Thin boundary layers
Navier Stokes equations
spellingShingle Actuators
Air
Boundary conditions
Boundary layers
Dielectric properties
Velocity
Velocity distribution
Flow behaviours
Flow Stabilization
Numerical experiments
Numerical results
Plasma actuation
Problem description
Schlieren techniques
Thin boundary layers
Navier Stokes equations
Bermudez, M.M.
Sosa, R.
Grondona, D.
Márquez, A.
Kelly, H.
Artana, G.
Study of a pseudo-empirical model approach to characterize plasma actuators
topic_facet Actuators
Air
Boundary conditions
Boundary layers
Dielectric properties
Velocity
Velocity distribution
Flow behaviours
Flow Stabilization
Numerical experiments
Numerical results
Plasma actuation
Problem description
Schlieren techniques
Thin boundary layers
Navier Stokes equations
description The use of plasma actuators is a recent technology that imposes a localized electric force that is used to control air flows. A suitable representation of actuation enables to undertake plasma actuators optimization, to design flow-control strategies, or to analyse the flow stabilization that can be attained by plasma forcing. The problem description may be clearly separated in two regions. An outer region, where the fluid is electrically neutral, in which the flow is described by the Navier-Stokes equation without any forcing term. An inner region, that forms a thin boundary layer, where the fluid is ionized and electric forces are predominant. The outer limit of the inner solution becomes the boundary condition for the outer problem. The outer problem can then be solved with a slip velocity that is issued from the inner solution. Although the solution for the inner problem is quite complex it can be contoured proposing pseudo-empirical models where the slip velocity of the outer problem is determined indirectly from experiments. This pseudo-empirical model approach has been recently tested in different cylinder flows and revealed quite adapted to describe actuated flow behaviour. In this work we determine experimentally the influence of the duty cycle on the slip velocity distribution. The velocity was measured by means of a pitot tube and flow visualizations of the starting vortex (i.e. the induced flow when actuation is activated in a quiescent air) have been done by means of the Schlieren technique. We also performed numerical experiments to simulate the outer region problem when actuation is activated in a quiescent air using a slip velocity distribution as a boundary condition. The experimental and numerical results are in good agreement showing the potential of this pseudo-empirical model approach to characterize the plasma actuation.
format Documento de conferencia
Documento de conferencia
publishedVersion
author Bermudez, M.M.
Sosa, R.
Grondona, D.
Márquez, A.
Kelly, H.
Artana, G.
author_facet Bermudez, M.M.
Sosa, R.
Grondona, D.
Márquez, A.
Kelly, H.
Artana, G.
author_sort Bermudez, M.M.
title Study of a pseudo-empirical model approach to characterize plasma actuators
title_short Study of a pseudo-empirical model approach to characterize plasma actuators
title_full Study of a pseudo-empirical model approach to characterize plasma actuators
title_fullStr Study of a pseudo-empirical model approach to characterize plasma actuators
title_full_unstemmed Study of a pseudo-empirical model approach to characterize plasma actuators
title_sort study of a pseudo-empirical model approach to characterize plasma actuators
publishDate 2011
url http://hdl.handle.net/20.500.12110/paper_17426588_v296_n1_p_Bermudez
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v296_n1_p_Bermudez_oai
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