Research Article
May 1972
Drag Coefficient of Cylinders in Turbulent Flow
Publication: Journal of the Hydraulics Division
Volume 98, Issue 5
Abstract
The effects of free-stream turbulence on the drag coefficient of a circular cylinder were investigated experimentally in an air duct. The experiments were performed over a range of Reynolds number, based on mean velocity and cylinder diameter, from 1,350 < Re < 8,000. A constant temperature hot-film anemometer was used to determine the turbulence intensity which was between 1.2% < u' < 21%. The range of the dimensionless turbulence scale was from 0.5 < ∂/D < 3.3, in which ∂ = the turbulence scale defined through the integral of auto-correlation function and D = the diameter of the cylinder. Two smooth circular cylinders were used. They were 1/4 in. and 1/2 in. 6.35 mm and 12.7 mm shell fraction. Quantitative results were obtained. Equations describing the relationship between the drag coefficient and turbulence characteristics were also obtained.
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Published In
Journal of the Hydraulics Division
Volume 98 • Issue 5 • May 1972
Pages: 897 - 912
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: May 1972
Published online: Feb 3, 2021
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Authors
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Stephen C. Ko, AM.ASCE
Asst. Prof., Systems and Industrial Engrg. Dept., Univ. of Arizona, Tucson, Ariz.
Walter H. Graf, AM.ASCE
Assoc. Prof. and Dir., Hydraulic and Sanitary Engrg. Div., Dept. of Civ. Engrg., Fritz Engrg. Lab., Lehigh Univ., Bethlehem, Pa.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.