An experimental study of a mixing layer between two uniform parallel streams is undertaken for three velocity ratios: 0.81, 0.75 and 0.65. It is found that the mixing layer grows linearly with streamwise distance in each case, as anticipated. Except in the very intermittent region, the mean velocity profiles agree with Görtler's theoretical prediction based on the assumption that the eddy viscosity is constant across the flow. The measurement of turbulent intensities and shear stress provide
evidence that the flow becomes self preserving. The non-dimensional longitudinal intensity is symmetrical about the average velocity point, and is independent of the velocity ratio; although other non-dimensional Reynolds stress distributions are roughly independent of velocity ratio, they are not symmetrical. The shear stress calculated from the two dimensional mean equation of motion agrees well with measured values. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate
Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/34589 |
Date | January 1969 |
Creators | Pui, Nam Kiong |
Publisher | University of British Columbia |
Source Sets | University of British Columbia |
Language | English |
Detected Language | English |
Type | Text, Thesis/Dissertation |
Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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