Three-dimensional turbulent wall jet was investigated using a particle image velocimetry technique. Three Reynolds numbers based on the jet exit velocity and diameter of 5000, 10,000, and 20,000 were studied. Profiles of the mean velocities, turbulence intensities, and Reynolds shear stresses as well as two-point velocity correlations and proper orthogonal decomposition analyses were used to document the salient features of the wall jets. The decay and spread rates are independent of Reynolds numbers in the self-similar region. The estimated values of 1.15, 0.054, and 0.255 for the decay rate, wall-normal spread rate, and lateral spread rate, respectively, are within the range of values reported in the literature. The two-point correlation analysis showed that the inclination of the streamwise velocity correlation contours in the inner layer is in the wall region, which is similar to those of canonical turbulent boundary layers. The results from the proper orthogonal decomposition indicate that low-order modes contribute more to the turbulence statistics in the self-similar region than in the developing region. The Reynolds shear stresses are the biggest benefactors of the low-order mode contribution while the wall-normal turbulence intensities are the least.
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February 2011
Research Papers
Characteristics of Turbulent Three-Dimensional Wall Jets
M. Agelin-Chaab,
M. Agelin-Chaab
Department of Mechanical and Manufacturing Engineering,
e-mail: umagelin@cc.umanitoba.ca
University of Manitoba
, Winnipeg, MB, R3T 5V6, Canada
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M. F. Tachie
M. F. Tachie
Department of Mechanical and Manufacturing Engineering,
University of Manitoba
, Winnipeg, MB, R3T 5V6, Canada
Search for other works by this author on:
M. Agelin-Chaab
Department of Mechanical and Manufacturing Engineering,
University of Manitoba
, Winnipeg, MB, R3T 5V6, Canadae-mail: umagelin@cc.umanitoba.ca
M. F. Tachie
Department of Mechanical and Manufacturing Engineering,
University of Manitoba
, Winnipeg, MB, R3T 5V6, CanadaJ. Fluids Eng. Feb 2011, 133(2): 021201 (12 pages)
Published Online: February 17, 2011
Article history
Received:
December 22, 2009
Revised:
November 7, 2010
Online:
February 17, 2011
Published:
February 17, 2011
Citation
Agelin-Chaab, M., and Tachie, M. F. (February 17, 2011). "Characteristics of Turbulent Three-Dimensional Wall Jets." ASME. J. Fluids Eng. February 2011; 133(2): 021201. https://doi.org/10.1115/1.4003277
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