• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Dynamique des Fluides (DynFluid)
  • View Item
  • Home
  • Dynamique des Fluides (DynFluid)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

On wall pressure fluctuations and their coupling with vortex dynamicsin a separate d–reattache d turbulent flow over a blunt flat plate

Article dans une revue avec comité de lecture
Author
TENAUD, C
PODVIN, B
FRAIGNEAU, Y
ccDARU, Virginie
247329 Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur [LIMSI]
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/17517
DOI
10.1016/j.ijheatfluidflow.2016.08.002
Date
2016
Journal
International Journal of Heat and Fluid Flow

Abstract

This study deals with the numerical predictions through Large-Eddy Simulation ( LES ) of the separated–reattached turbulent flow over a blunt flat plate for analyzing main coherent structure features and theirrelation to the unsteady pressure field. A compressible approach that inherently includes acoustic prop- agation is here followed to describe the relationship between pressure fluctuations and vortex dynam- ics around the separation bubble. The objective of the present work is then to contribute to a betterunderstanding of the coupling between the vortex dynamics and the wall pressure fluctuations. The fil- tered compressible Navier–Stokes equations are then solved with a numerical method that follows a Lax–Wendroffapproach to recover a high accuracy in both time and space. For validations, the present numer- ical results are compared to experimental measurements, coming from both the Pprime laboratory (Sicotel al., 2012) and the literature (Cherry et al., 1984; Kiya and Sasaki, 1985; Tafti and Vanka,1991; Sicotet al., 2012). Our numerical results very well predict mean and fluctuating pressure and velocity fields.Flapping, shedding as well as Kelvin–Helmholtz characteristic frequencies educed by present simulationsare in very good agreement with the experimental values generally admitted. These characteristic modesare also visible on unsteady pressure signatures even far away from the separation. Spectral, POD andEPOD (extended POD) analyses are then applied to these numerical data to enhance the salient featuresof the pressure and velocity fields, especially the unsteady wall pressure in connection with either thevortex shedding or the low frequency shear-layer flapping. A contribution to the understanding of thecoupling between wall pressure fluctuations and eddy vortices is finally proposed.

Files in this item

Name:
Dynfluid-IJHFF-2016-Tenaud.pdf
Size:
7.025Mb
Format:
PDF
View/Open

Collections

  • Dynamique des Fluides (DynFluid)

Related items

Showing items related by title, author, creator and subject.

  • A time semi-implicit scheme for the energy-balanced coupling of a shocked fluid flow with a deformable structure 
    Article dans une revue avec comité de lecture
    PUSCAS, Maria Adela; MONASSE, Laurent; ERN, Alexandre; TENAUD, Christian; MARIOTTI, Christian; ccDARU, Virginie (Elsevier, 2015)
    The objective of this work is to present a conservative coupling method between an inviscid compressible fluid and a deformable structure undergoing large displacements. The coupling method combines a cut-cell Finite Volume ...
  • Déplacement d'interfaces liquide - gaz sous l'effet d'un chauffage 
    Communication avec acte
    DULUC, Marie-Christine; ELAYYADI, Isam; LE QUÉRÉ, Patrick; ccDARU, Virginie (Société Française de Thermique / Congrès Français de Thermique, 29 mai - 1 juin 2007, Île des Embiez, 2007)
    On étudie numériquement une configuration diphasique monodimensionnelle assimilable à un actuateur thermique de petites dimensions dans laquelle deux lames d'air sont séparées entre elle par une lame d'eau liquide. On ...
  • An unexpected balance between outer Rayleigh streaming sources 
    Article dans une revue avec comité de lecture
    BALTEAN-CARLÈS, Diana; WEISMAN, Catherine; TABAKOVA, S.; BAILLIET, Hélène; ccDARU, Virginie (Cambridge University Press (CUP), 2019)
    Acoustic streaming generated by a plane standing wave between two infinite plates or inside a cylindrical tube is considered, under the isentropic flow assumption. A two-dimensional analysis is performed in the linear case ...
  • Two-dimensional numerical simulations of nonlinear acoustic streaming in standing waves 
    Article dans une revue avec comité de lecture
    BALTEAN-CARLÈS, Diana; WEISMAN, Catherine; DEBESSE, Philippe; GANDIKOTA, Gurunath; ccDARU, Virginie (Elsevier, 2013)
    Numerical simulations of compressible Navier–Stokes equations in closed two-dimensional channels are performed. A plane standing wave is excited inside the channel and the associated acoustic streaming is investigated for ...
  • Fast acoustic streaming in standing waves : Generation of an additional outer streaming cell 
    Article dans une revue avec comité de lecture
    REYT, Ida; BAILLIET, Hélène; MOREAU, Solène; VALIERE, Jean-Christophe; BALTEAN-CARLÈS, Diana; WEISMAN, Catherine; ccDARU, Virginie (Acoustical Society of America, 2013)
    Rayleigh streaming in a cylindrical acoustic standing waveguide is studied both experimentally and numerically for nonlinear Reynolds numbers from 1 to 30. Streaming velocity is measured by means of laser Doppler velocimetry ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales