Title
The subtle effect of integral scale on the drag of a circular cylinder in turbulent cross flow
Document Type
Article
Publication Date
1-1-2012
Publication Title
Wind and Structures, An International Journal
Volume
15
Issue
6
First Page
463
Keywords
Circular cylinder, Cross flow, Drag, Integral length scale, Turbulence, Turbulence intensity
Last Page
480
Abstract
The effects of Reynolds number (Re), freestream turbulence intensity (Tu) and integral length scale (Λ) on the drag coefficient (Cd) of a circular cylinder in cross flow were experimentally studied for 6.45 × 103 < Re < 1.82 × 104. With the help of orificed plates, Tu was fixed at approximately 0.5%, 5%, 7% and 9% and the normalized integral length scale (L/D) was varied from 0.35 to 1.05. Our turbulent results confirmed the general trend of decreasing Cd with increasing Tu. The effectiveness of Tu in reducing Cd is found to lessen with increasing Λ/D. Most interestingly, freestream turbulence of low Tu (≈ 5%) and large Λ/D (≈ 1.05) can increase the Cd above the corresponding smooth flow value.
DOI
10.12989/was.2012.15.6.463
ISSN
12266116
Recommended Citation
Younis, Nibras and Ting, David S.K.. (2012). The subtle effect of integral scale on the drag of a circular cylinder in turbulent cross flow. Wind and Structures, An International Journal, 15 (6), 463-480.
https://scholar.uwindsor.ca/mechanicalengpub/223