کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
293626 | 511161 | 2012 | 7 صفحه PDF | دانلود رایگان |
This paper presents the results of an experimental study of the influence of Reynolds number on the vortex-shedding excitation of a super tall building with a quasi-circular cross-section, uniform with height. Sectional model tests were carried out on a large model in a large wind tunnel at high wind speeds to reach Reynolds number in excess of 3 million based on the model diameter. Stationary model tests and free-to-respond model tests were carried out for various azimuth angles, in smooth and turbulent flow. The study revealed that for this building cross-section, the dynamic excitation due to vortex shedding was equally important at high Reynolds numbers when compared to experiments performed in the sub-critical Reynolds number regime.
► Rare study of the aerodynamics of a tall building at Reynolds (Re) numbers higher than 1 million.
► Wind tunnel tests at low and high Re numbers are compared in two different test facilities on a building.
► Vortex-shedding excitation is not necessary lower in the supercritical Re number regime.
► Openings can mitigate across-wind excitation but can also make the excitation stronger for some directions.
► Experiments on a large sectional model suspended on springs in a large wind tunnel are described.
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volumes 104–106, May–July 2012, Pages 49–55