Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion
Highlights Aerodynamic properties of hexadecagonal section models by wind tunnel tests. Effects induced by rounded corners, ancillaries and ladder. Role of Reynolds number and turbulence intensity is investigated. Non-negligible values of lift coefficient are obtained. Susceptibility to galloping for 16-sided polygonal section is discussed.
Abstract This paper evaluates and discusses the aerodynamic properties of a 16-sided polygonal cylinder with imperfections and ancillaries investigated by wind tunnel tests. Two sectional models with different size have been realized, reproducing the peculiarities of real structures, such as the rounded corners, local protuberance due to weld bead, cables, ducts and the external ladder. The models have been subjected to static tests to measure the mean force coefficients and the Strouhal number varying angle of attack, flow velocity, turbulence intensity focusing on the effects of the imperfections and ancillaries on the aerodynamic loads with consideration of Reynolds number effects. The results provide an estimate of the aerodynamic coefficients for this type of elements, quantify the influence of geometrical and flow properties on the aerodynamic behaviour and point out the sensitivity of such polygonal cross-section to galloping instability.
Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion
Highlights Aerodynamic properties of hexadecagonal section models by wind tunnel tests. Effects induced by rounded corners, ancillaries and ladder. Role of Reynolds number and turbulence intensity is investigated. Non-negligible values of lift coefficient are obtained. Susceptibility to galloping for 16-sided polygonal section is discussed.
Abstract This paper evaluates and discusses the aerodynamic properties of a 16-sided polygonal cylinder with imperfections and ancillaries investigated by wind tunnel tests. Two sectional models with different size have been realized, reproducing the peculiarities of real structures, such as the rounded corners, local protuberance due to weld bead, cables, ducts and the external ladder. The models have been subjected to static tests to measure the mean force coefficients and the Strouhal number varying angle of attack, flow velocity, turbulence intensity focusing on the effects of the imperfections and ancillaries on the aerodynamic loads with consideration of Reynolds number effects. The results provide an estimate of the aerodynamic coefficients for this type of elements, quantify the influence of geometrical and flow properties on the aerodynamic behaviour and point out the sensitivity of such polygonal cross-section to galloping instability.
Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion
Orlando, Andrea (Autor:in) / Pagnini, Luisa (Autor:in) / Pia Repetto, Maria (Autor:in)
Engineering Structures ; 274
09.10.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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