New results on the structure of turbulence in a mixing layer with and without swirl

Samuel Davoust; Laurent Jacquin; Benjamin Leclaire

doi:10.1016/j.ijheatfluidflow.2014.05.012

New results on the structure of turbulence in a mixing layer with and without swirl

ONERA Office National d'Etudes et Recherches Aerospatiales

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The near field of a 2.14×10⁵ Reynolds number, low-Mach-number, cylindrical jet with and without swirl has been investigated by high-speed stereo PIV in a transverse plane, two diameters downstream of the jet exit. Using spatiotemporal correlations, we investigate the dynamics of streamwise vorticity in the shear layer, responsible for the mixing properties of the jet, and show how swirl affects this vorticity. A dynamical scenario is proposed, which explains how the mean shear and the azimuthal m=0 vortices contribute to the spatial organization observed.

langue originale	Anglais
Pages (de - à)	11-17
Nombre de pages	7
journal	International Journal of Heat and Fluid Flow
Volume	49
Numéro de publication	C
Les DOIs	https://doi.org/10.1016/j.ijheatfluidflow.2014.05.012
état	Publié - 1 janv. 2014
Modification externe	Oui

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10.1016/j.ijheatfluidflow.2014.05.012

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title = "New results on the structure of turbulence in a mixing layer with and without swirl",

abstract = "The near field of a 2.14×105 Reynolds number, low-Mach-number, cylindrical jet with and without swirl has been investigated by high-speed stereo PIV in a transverse plane, two diameters downstream of the jet exit. Using spatiotemporal correlations, we investigate the dynamics of streamwise vorticity in the shear layer, responsible for the mixing properties of the jet, and show how swirl affects this vorticity. A dynamical scenario is proposed, which explains how the mean shear and the azimuthal m=0 vortices contribute to the spatial organization observed.",

keywords = "High-speed piv, Mixing layer, Mixing layer turbulence, Swirl",

author = "Samuel Davoust and Laurent Jacquin and Benjamin Leclaire",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier Inc.",

year = "2014",

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doi = "10.1016/j.ijheatfluidflow.2014.05.012",

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AU - Davoust, Samuel

AU - Jacquin, Laurent

AU - Leclaire, Benjamin

PY - 2014/1/1

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N2 - The near field of a 2.14×105 Reynolds number, low-Mach-number, cylindrical jet with and without swirl has been investigated by high-speed stereo PIV in a transverse plane, two diameters downstream of the jet exit. Using spatiotemporal correlations, we investigate the dynamics of streamwise vorticity in the shear layer, responsible for the mixing properties of the jet, and show how swirl affects this vorticity. A dynamical scenario is proposed, which explains how the mean shear and the azimuthal m=0 vortices contribute to the spatial organization observed.

AB - The near field of a 2.14×105 Reynolds number, low-Mach-number, cylindrical jet with and without swirl has been investigated by high-speed stereo PIV in a transverse plane, two diameters downstream of the jet exit. Using spatiotemporal correlations, we investigate the dynamics of streamwise vorticity in the shear layer, responsible for the mixing properties of the jet, and show how swirl affects this vorticity. A dynamical scenario is proposed, which explains how the mean shear and the azimuthal m=0 vortices contribute to the spatial organization observed.

KW - High-speed piv

KW - Mixing layer

KW - Mixing layer turbulence

KW - Swirl

U2 - 10.1016/j.ijheatfluidflow.2014.05.012

DO - 10.1016/j.ijheatfluidflow.2014.05.012

M3 - Article

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SN - 0142-727X

VL - 49

SP - 11

EP - 17

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

IS - C

ER -

New results on the structure of turbulence in a mixing layer with and without swirl

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