Research Article
Dec 1976
Mean Wind Loading on Rough-Walled Cooling Towers
Authors: Cesar Farell, Oktay Guven, AM.ASCE, and Federico MaischAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 102, Issue 6
Abstract
Mean pressure distributions were measured on a cooling tower model in uniform wind for several longitudinal-rib configurations and two uniformly distributed roughnesses. The base pressure coefficient is shown to be fairly constant along the cooling-tower height and independent of roughness in the range of Reynolds number independence. The difference between the base and minimum pressure coefficients, on the other hand, is shown to decrease with increasing relative roughness or decreasing relative rib spacing if there is not interaction between the flow patterns around consecutive ribs. This results in significant reductions in the magnitude of the negative mean side pressures on the structure and supports the use of strakes on prototypes for the purpose of reducing the mean side sections. The physical mechanisms responsible for the surface roughness effects are identified in the light of the boundary-layer theory. Possible choices as roughness configurations are examined within the limits of the available data.
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Published In
Journal of the Engineering Mechanics Division
Volume 102 • Issue 6 • December 1976
Pages: 1059 - 1081
Copyright
© 1976 American Society of Civil Engineers.
History
Published in print: Dec 1976
Published online: Feb 3, 2021
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Authors
Affiliations
Cesar Farell
Assoc. Prof., Div. of Energy Engrg.; Research Engr., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa; and Maitre de Conferences Associe, Universite de Grenoble, Grenoble, France
Oktay Guven, AM.ASCE
Research Assoc., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa; on leave as Instructor, Middle East Technical Univ., Ankara, Turkey
Federico Maisch
Formerly, Research Asst., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa
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