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

Samuel Davoust; Laurent Jacquin; Benjamin Leclaire

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

Samuel Davoust, Laurent Jacquin, Benjamin Leclaire

ONERA Office National d'Etudes et Recherches Aerospatiales

Research output: Contribution to conference › Paper › peer-review

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.

Original language	English
Publication status	Published - 1 Jan 2013
Externally published	Yes
Event	8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France Duration: 28 Aug 2013 → 30 Aug 2013

Conference

Conference	8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
Country/Territory	France
City	Poitiers
Period	28/08/13 → 30/08/13

Cite this

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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.",

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

year = "2013",

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language = "English",

note = "8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 ; Conference date: 28-08-2013 Through 30-08-2013",

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T1 - New results on the structure of turbulence in a mixing layer with and without swirl

AU - Davoust, Samuel

AU - Jacquin, Laurent

AU - Leclaire, Benjamin

PY - 2013/1/1

Y1 - 2013/1/1

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.

M3 - Paper

AN - SCOPUS:85034041864

T2 - 8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013

Y2 - 28 August 2013 through 30 August 2013

ER -

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

Abstract

Conference

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