Research Article
Aug 1973
Aerodynamic Forces on a Triangular Cylinder
Publication: Journal of the Engineering Mechanics Division
Volume 99, Issue 4
Abstract
Wind tunnel studies have been conducted on flow around an equilateral triangular cylinder mounted with the point upstream. Instantaneous pressure measurements taken around the cross section have enabled a simple picture to be drawn of the pressure perturbations due to the vortex shedding at the rear. Integration of the pressures produces a mean and fluctuating force and moment coefficients. Mean lift and moment coefficients are found to be zero as anticipated from symmetry. Fluctuating lift and moment coefficients occur at the frequency of shedding of a pair of vortices and vary with Reynolds number. The fluctuating drag coefficient is significantly smaller and occurs at double the frequency. Measurements made of the velocity field in the vortex street showed that the velocity and wave length of the street increased downstream and reached a steady state within 10 days.
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Published In
Journal of the Engineering Mechanics Division
Volume 99 • Issue 4 • August 1973
Pages: 803 - 818
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Aug 1973
Published online: Feb 3, 2021
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C.F.M. Twigg-Molecey
Engr., Hatch Assoc. Ltd., Toronto, Ontario
W. Douglas Baines, M.ASCE
Prof. and Chmn., Dept. of Mech. Engrg., Univ. of Toronto, Toronto, Ontario, Canada
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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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.