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Title: Measurements of Fluctuating Pressures on a Circular Cylinder in Subsonic Crossflow
Authors: Ackerman, J.R.
Gostelow, J. Paul
Rona, Aldo
Carscallen, William E.
First Published: Sep-2009
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Citation: AIAA Journal, 2009, 47 (9), pp. 2121-2131.
Abstract: A circular cylinder is tested in crossflow over the subsonic speed range. Time-resolved pressure distributions give information on surface pressure fluctuations; the corresponding drag and base drag coefficients are provided. Measured base pressure fluctuations at low Mach numbers are in agreement with the findings of other researchers. Flowchanges at higher subsonic velocitiesandinto the transonic range are described. Illustrations aredrawnfrom the observations of other researchers, enabling physical explanations to be given to assist toward amoregeneral modeling of theproblem.AtMachnumbersabove0.6 thechangingstrength of the vortices reduces thebase dragcoefficientupto aMachnumber of 0.9, at which the onset of sonicflowincreases the drag. Strouhal numbervariation is compared with the measurements of other authors. The paper concentrates on providing reliable measurements of vortex shedding and base pressure over the subsonic speed range rather than attempting to provide universal correlations.
DOI Link: 10.2514/1.40954
ISSN: 0001-1452
Type: Article
Rights: This paper was published as AIAA Journal, 2009, 47 (9), pp. 2121-2131, and was presented as Paper 4305 at the 38th AIAA Fluid Dynamics Conference, Seattle, WA, 23-26 June, 2008. Copyright © 2009 by the American Institute of Aeronautics and Astronautics. It is available from It appears here with the permission of the American Institute of Aeronautics and Astronautics, Inc. Doi: 10.2514/1.40954
Appears in Collections:Published Articles, Dept. of Engineering

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