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Research Papers: Fundamental Issues and Canonical Flows

Turbulence Measurements in a Corner Wall Jet1

[+] Author and Article Information
Barrett Poole

Department of Mechanical Engineering,
University of New Brunswick,
Fredericton, NB E3B 5A3, Canada
e-mail: Barrett_James.Poole@unb.ca

Joseph W. Hall

Department of Mechanical Engineering,
University of New Brunswick,
Fredericton, NB E3B 5A3, Canada
e-mail: jwhall@unb.ca

2Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received October 26, 2015; final manuscript received February 23, 2016; published online May 18, 2016. Assoc. Editor: Mark F. Tachie.

J. Fluids Eng 138(8), 081204 (May 18, 2016) (8 pages) Paper No: FE-15-1768; doi: 10.1115/1.4033032 History: Received October 26, 2015; Revised February 23, 2016

The corner wall jet is similar to the standard three-dimensional wall jet with the exception that one-half of the surface has been rotated counterclockwise by 90 deg. The corner wall jet is selected for study as the geometry occurs in practical applications and is an ideal benchmark case for numerical code validation. The corner wall jet investigated here is formed using a long round pipe with a Reynolds number of 159,000. Contours of the mean and turbulent flow field were measured using hot-wire anemometry from x/D = 0 to 40. The results indicate that the ratio of lateral-to-vertical growth in the corner wall jet is approximately half that in a standard turbulent three-dimensional wall jet. The results indicate that this behavior is not simply tied to a slower development of the corner wall jet.

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References

Figures

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Fig. 5

Pipe positioning with respect to wall for corner wall jet

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Fig. 4

Profiles of mean velocity and turbulent intensity taken at the pipe exit: (a) mean velocity (), one-seventh power-law profile (–), and mean streamwise velocity (▴) from Sun [1] and (b) turbulence intensity ()

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Fig. 3

Schematic of the corner wall jet facility

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Fig. 2

Schematic of a three-dimensional corner wall jet issuing from a round pipe

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Fig. 1

Schematic of the three-dimensional wall jet with nomenclature

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Fig. 6

Mean velocity (left) and turbulent intensity (right) contours measured in a corner wall jet at (a) x/D=0, (b) x/D=10, and (c) x/D=20

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Fig. 7

Mean velocity (left) and turbulent intensity (right) contours measured in a corner wall jet at (a) x/D=30 and (b) x/D=40

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Fig. 8

Mean velocity (a) and turbulent intensity (b) bisector profiles measured in the near-field of a corner wall jet

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Fig. 9

Mean velocity (a) and turbulent intensity (b) bisector profiles measured in the intermediate field of a corner wall jet

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Fig. 10

Mean velocity (a) and turbulent intensity (b) bisector profiles normalized in terms of similarity variables in the intermediate field of a corner wall jet

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Fig. 11

Mean velocity contours normalized in terms of similarity variables at x/D=30 (a) and x/D=40 (b)

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Fig. 12

Contours of turbulence intensity normalized in terms of similarity variables at x/D=30 (a) and x/D=40 (b)

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Fig. 13

A comparison of the streamwise decay of the local maximum mean velocity for the corner wall jet and the three-dimensional wall jet formed using long pipe [11]

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Fig. 14

A comparison of the streamwise development of the half-widths in the three-dimensional wall jet and the corner wall jet. Corner wall jet: ▪—ζ1/2 and ♦—z1∕2. Three-dimensional wall jet formed using long pipe [11]: ▾—y1/2 and ▴—z1∕2.

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