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Turbulence measurements of an inclined rectangular jet embedded in a turbulent boundary layer

Turbulence measurements of an inclined rectangular jet embedded in a turbulent boundary layer
Turbulence measurements of an inclined rectangular jet embedded in a turbulent boundary layer
Turbulence measurements were performed of an inclined jet in an otherwise flat plate turbulent boundary layer. The jet was produced using a rectangular nozzle. The pitch angle of the nozzle was 30o and the skew angle varied between 0o and 135o. The speed of the jet was the same as that of the oncoming freestream. Measurements revealed modifications to both turbulent kinetic energy (TKE) and stress distributions around the centre of the vortex and in the near-wall region. The influence of the wake of the jet featured prominently in the TKE distribution. The primary shear stress was found to be characterized by two areas of opposite signs and separated by the centre of the vortex at a skew angle higher than 30o. When the skew angle was varied, only qualitative changes were observed between 45o and 90o skew. Between 30o and 135o skew, an area of negative primary shear stress was observed between the centre of the vortex and the wall.
vortex flow, turbulence measurement, jet
0142-727X
291-296
Zhang, X.
2a998468-40dc-4bff-b640-5c7bf74b416b
Zhang, X.
2a998468-40dc-4bff-b640-5c7bf74b416b

Zhang, X. (2000) Turbulence measurements of an inclined rectangular jet embedded in a turbulent boundary layer. International Journal of Heat and Fluid Flow, 21 (3), 291-296. (doi:10.1016/S0142-727X(00)00012-6).

Record type: Article

Abstract

Turbulence measurements were performed of an inclined jet in an otherwise flat plate turbulent boundary layer. The jet was produced using a rectangular nozzle. The pitch angle of the nozzle was 30o and the skew angle varied between 0o and 135o. The speed of the jet was the same as that of the oncoming freestream. Measurements revealed modifications to both turbulent kinetic energy (TKE) and stress distributions around the centre of the vortex and in the near-wall region. The influence of the wake of the jet featured prominently in the TKE distribution. The primary shear stress was found to be characterized by two areas of opposite signs and separated by the centre of the vortex at a skew angle higher than 30o. When the skew angle was varied, only qualitative changes were observed between 45o and 90o skew. Between 30o and 135o skew, an area of negative primary shear stress was observed between the centre of the vortex and the wall.

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More information

Published date: 2000
Keywords: vortex flow, turbulence measurement, jet

Identifiers

Local EPrints ID: 21336
URI: http://eprints.soton.ac.uk/id/eprint/21336
ISSN: 0142-727X
PURE UUID: 6f2e7287-12ce-4fb3-a553-d4f18ea9348e

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Date deposited: 14 Mar 2006
Last modified: 15 Mar 2024 06:29

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Author: X. Zhang

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