Blockage effects on a circular cylinder in a rectangular flume.

Long, N. C. (1969). Blockage effects on a circular cylinder in a rectangular flume. Master's Thesis, School of Engineering, The University of Queensland.

       
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Author Long, N. C.
Thesis Title Blockage effects on a circular cylinder in a rectangular flume.
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 1969
Thesis type Master's Thesis
Language eng
Subjects 0905 Civil Engineering
Formatted abstract This thesis presents the results of a series of experiments conducted in an open flume to determine the effect of blockage on the drag coefficient of a circular cylinder in a free surface flow.

                           The range of parameters covered is

                                    d/D: 2, 4, 6, 8, 10
                                    w/D: 4, 6, 8, 9, 12, 16, 18, 24.
                                    Re: 7.1 X 103 - 6.4 X 104
                                    Fd: .192 - .806
                                    Fd: .421 - 1.964

A strong correlation has been found in the plots of CD vs FD, and the form of these plots partly related to the changes in the surface structure of the wake. Except for small W/D ratios, the drag coefficient is found to be less than that which would be expected for two dimensional flow at the same Reynolds number.

Blockage corrections due to Woods (1961) and Haskell (1963) have been applied to the experimental data and found to collapse the range considerably. Both corrections give a very similar result.

Keyword Flumes.
Hydraulic structures -- Testing.

 
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Created: Fri, 01 Oct 2010, 15:52:48 EST by Ning Jing on behalf of Social Sciences and Humanities Library Service