Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Aerodynamic Characteristics of Iced 8-bundle Conductors under Different Turbulence Intensities
Abstract Iced conductor motion is induced by the aerodynamic instability. The aerodynamic characteristics of iced bundle conductors in turbulent flow are significantly different from that in uniform flow. The aerodynamic coefficients of iced 8-bundle conductors’ segment models under different turbulence intensities flow are measured by the wind tunnel experiment. Furthermore, the aerodynamic coefficients of each crescent- and sector-shape iced 8-bundle conductors under different turbulence intensities flow and ice thicknesses are obtained. The wind tunnel test results indicate there have obvious difference between aerodynamic characteristics of bundle conductors in turbulent flow and that in uniform flow. Then, key parameters, such as turbulence intensity, ice thickness and ice shape have significant influences on aerodynamic coefficients of each sub-conductors. Differences exist among aerodynamic coefficients of crescent-shape and sector-shape iced 8-bundle conductors. Finally, the galloping coefficients of iced 8-bundle conductors are discussed. The wind tunnel experiment results can offer useful reference resources for the comprehensive analysis of galloping of iced bundle conductors and their prevention techniques.
Aerodynamic Characteristics of Iced 8-bundle Conductors under Different Turbulence Intensities
Abstract Iced conductor motion is induced by the aerodynamic instability. The aerodynamic characteristics of iced bundle conductors in turbulent flow are significantly different from that in uniform flow. The aerodynamic coefficients of iced 8-bundle conductors’ segment models under different turbulence intensities flow are measured by the wind tunnel experiment. Furthermore, the aerodynamic coefficients of each crescent- and sector-shape iced 8-bundle conductors under different turbulence intensities flow and ice thicknesses are obtained. The wind tunnel test results indicate there have obvious difference between aerodynamic characteristics of bundle conductors in turbulent flow and that in uniform flow. Then, key parameters, such as turbulence intensity, ice thickness and ice shape have significant influences on aerodynamic coefficients of each sub-conductors. Differences exist among aerodynamic coefficients of crescent-shape and sector-shape iced 8-bundle conductors. Finally, the galloping coefficients of iced 8-bundle conductors are discussed. The wind tunnel experiment results can offer useful reference resources for the comprehensive analysis of galloping of iced bundle conductors and their prevention techniques.
Aerodynamic Characteristics of Iced 8-bundle Conductors under Different Turbulence Intensities
Cai, Mengqi (Autor:in) / Xu, Qian (Autor:in) / Zhou, Linshu (Autor:in) / Liu, Xiaohui (Autor:in) / Huang, Hanjie (Autor:in)
KSCE Journal of Civil Engineering ; 23 ; 4812-4823
14.10.2019
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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