The variation of the base pressure coefficient (Cp) and the characteristics of the power spectra of the velocity for arrays of two-, three- and four-plates aligned normal to the flow are presented. The wakes downstream of the plates in the array are shown to exhibit behavior that varies between stable modes, flopping and quasi-stable behavior depending on the distance (where s is the spacing between the top and bottom surfaces of adjacent plates and t is the thickness of the plate). For the two and three-plate arrays with peaks in the power spectra of about 48.2 and 98.1 Hz which correspond to Strouhal numbers of 0.06 and 0.11 are observed. For the four-plate array with no clear peaks are visible. Probability density functions of uncalibrated hot-wire signals show that the peaks in the power do not correspond to continuously periodic fluctuations. [S0098-2202(00)00604-0]
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December 2000
Technical Papers
Investigation of the Flopping Regime of Two-, Three-, and Four-Plate Arrays
D. W. Guillaume, Assistant Professor,,
D. W. Guillaume, Assistant Professor,
Department of Mechanical Engineering, California State University, Los Angeles, Los Angeles, CA 90032
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J. C. LaRue, Professor,
J. C. LaRue, Professor,
Department of Mechanical and Aerospace Engineering, University of California, Irvine, Irvine, CA 92697
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D. W. Guillaume, Assistant Professor,
Department of Mechanical Engineering, California State University, Los Angeles, Los Angeles, CA 90032
J. C. LaRue, Professor,
Department of Mechanical and Aerospace Engineering, University of California, Irvine, Irvine, CA 92697
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division September 13, 1999; revised manuscript received June 1, 2000. Associated Technical Editor: P. Bearman.
J. Fluids Eng. Dec 2000, 122(4): 677-682 (6 pages)
Published Online: June 1, 2000
Article history
Received:
September 13, 1999
Revised:
June 1, 2000
Citation
Guillaume, D. W., and LaRue, J. C. (June 1, 2000). "Investigation of the Flopping Regime of Two-, Three-, and Four-Plate Arrays ." ASME. J. Fluids Eng. December 2000; 122(4): 677–682. https://doi.org/10.1115/1.1311789
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