Wind tunnel experimental investigation on tapered cylinders for highway support structures

Bosch, Harold R.; Guterres, Rui

doi:10.1016/s0167-6105(01)00144-1

Cited by 13 publications

(9 citation statements)

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“…The wind tunnel study by Bosch and Guterres [14] showed that St increased from 0.159 for face orientation to 0.179 for corner orientation of an octagonal cylinder. The Strouhal numbers they reported were based on the inscribed diameter and the Reynolds number was about 5000 (the actual value in their Fig.…”

Section: Frequency Analysismentioning

confidence: 97%

“…Guterres [14] tested octagonal cylinders (N = 8) in a wind tunnel. They found a higher Strouhal number for corner orientation than for face orientation over the Reynolds number range from 5000 to about 20 000 and an accompanying higher drag coefficient.…”

Section: E-mail Address: Hatefkhaledi@ntnuno (Ha Khaledi)mentioning

confidence: 99%

“…Cylindrical models with hexagonal cross-sections were also fabricated but no results were presented in Ref. [14]. Two-dimensional flow past regular polygons at low Reynolds numbers has recently been subjected to an extensive analytical and computational investigation by Tian and Wu [15].…”

Section: E-mail Address: Hatefkhaledi@ntnuno (Ha Khaledi)mentioning

confidence: 99%

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On vortex shedding from a hexagonal cylinder

Khaledi

Andersson

2011

Physics Letters A

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The unsteady wake behind a hexagonal cylinder in cross-flow is investigated numerically. The timedependent three-dimensional Navier-Stokes equations are solved for three different Reynolds numbers Re and for two different cylinder orientations. The topology of the vortex shedding depends on the orientation and the Strouhal frequency is generally higher in the wake of a face-oriented cylinder than behind a corner-oriented cylinder. For both orientations a higher Strouhal number St is observed when Re is increased from 100 to 500 whereas St is unaffected by a further increase up to Re = 1000. The distinct variation of St with the orientation of the hexagonal cylinder relative to the oncoming flow is opposite of earlier findings for square cylinder wakes which exhibited a higher St with corner orientation than with face orientation.

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Section: Frequency Analysismentioning

confidence: 97%

Section: E-mail Address: Hatefkhaledi@ntnuno (Ha Khaledi)mentioning

confidence: 99%

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On vortex shedding from a hexagonal cylinder

Khaledi

Andersson

2011

Physics Letters A

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“…The authors found from the tests that both the vortex induced vibration at a high wind speed and the ordinary vortex induced vibration were observed under uniform flow. Bosch and Guterres (2001) conducted wind tunnel experiments to establish the effects of wind on tapered cylinders using a total of 53 models representing a range of cross sections, taper ratios, and shapes (circular, octagonal, or hexagonal cross section), which were intended to be representative of those commonly found in highway structures. In a test of drag coefficient versus Reynolds number for the uniform circular cylinders, the results showed a consistent trend of convergence with a range of Reynolds numbers for which the drag coefficient flattens out to a constant value.…”

Section: Wind Tunnel Testingmentioning

confidence: 99%

Aerodynamic Parameters on a Multisided Cylinder for Fatigue Design

Chang¹

2011

Wind Tunnels and Experimental Fluid Dynamics Research

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“…Bosch and Guterres [62] conducted wind tunnel experiments to establish the effects of wind on tapered cylinders using a total of 53 models representing a range of cross sections, taper ratios, and shapes (circular, octagonal, or hexagonal cross section), which were intended to be representative of those commonly found in highway structures. In a test of drag coefficient versus Reynolds number for the uniform circular cylinders, the results showed a consistent trend of convergence with a range of Reynolds number for which drag coefficient flattens out to a constant value.…”

Section: Wind-tunnel Testmentioning

confidence: 99%