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Three-Dimensional Wall Jet Originating from a Circular Orifice

Published online by Cambridge University Press:  07 June 2016

B G Newman ,
R P Patel ,
S B Savage  and
H K Tjio
B G Newman
Affiliation:
McGill University, Montreal
R P Patel
Affiliation:
McGill University, Montreal
S B Savage
Affiliation:
McGill University, Montreal
H K Tjio
Affiliation:
McGill University, Montreal
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Summary

An incompressible three-dimensional turbulent wall jet originating from a circular orifice located adjacent to a plane wall is studied both theoretically and experimentally. An approximate similarity analysis predicts that the two transverse length scales, l0 and L0, and the inverse of the mean velocity scale grow linearly with distance downstream x from the orifice. Experimental measurements of mean velocity and longitudinal turbulence intensity profiles were made both in air and water with hot-wire and hot-film anemometers respectively. The behaviour predicted by the similarity analysis was verified. It was found that the rate of growth of the length scale normal to the plane wall, dl0/dx, was somewhat less than that found for a two-dimensional wall jet, whereas the rate of growth of the length scale in the lateral direction, dL0/dx, was about seven times greater than dl0/dx.

Type
Research Article
Information
Aeronautical Quarterly , Volume 23 , Issue 3 , August 1972 , pp. 188 - 200
Copyright
Copyright © Royal Aeronautical Society. 1972

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