Research Article
Oct 1968
Influence of Secondary Flow on Drag Force
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VIEW THE REPLYAuthors: Charles Dalton and Frank D. Masch, M.ASCEAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 94, Issue 5
Abstract
An experimental investigation was made to determine the axial variation of drag on a finite length circular cylinder with end plates and immersed in a linear velocity gradient flow. The drag coefficient for an incremental length of cylinder was found to vary from a minimum where the velocity was greatest to a maximum where the velocity was least. The force acting over the full cylinder length was found to be greater than that calculated for a uniform flow at the average velocity over the cylinder length. The pressure coefficient was found to differ when measured at the same velocity both in a uniform flow and a linear velocity gradient flow, a difference explained by secondary flow generated by the stagnation pressure gradient on the leading edge of the cylinder. A drag coefficient parameter was defined and found to increase uniformly as the length-to-diameter ratio, L/d, increased to a value of about seven; past this value the drag coefficient parameter was found to decrease.
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Published In
Journal of the Engineering Mechanics Division
Volume 94 • Issue 5 • October 1968
Pages: 1249 - 1260
Copyright
© 1968 American Society of Civil Engineers.
History
Published in print: Oct 1968
Published online: Feb 3, 2021
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Authors
Affiliations
Charles Dalton
Asst. Prof. of Mech. Engrg., Univ. of Houston, Houston, Texas.
Frank D. Masch, M.ASCE
Assoc. Prof. of Civ. Engrg., Univ. of Texas, Austin, Tex.
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