Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors
Iced conductor motion is induced by the aerodynamic instability of these conductors. The unsteady aerodynamic characteristics are different from the steady aerodynamic characteristics. The unsteady aerodynamic coefficients of typical iced conductors’ models under torsional motion are measured by the...
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Series: | Advances in Civil Engineering |
Online Access: | http://dx.doi.org/10.1155/2019/2586242 |
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doaj-4877d6ed963040eab446c1b2a6994be92020-11-25T01:32:13ZengHindawi LimitedAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/25862422586242Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle ConductorsMengqi Cai0Linshu Zhou1Hang Lei2Hanjie Huang3School of Civil Engineering & Architecture, Chengdu University, Chengdu 610106, ChinaState Grid Sichuan Integrated Energy Service Co. LTD, Chengdu 610072, ChinaSchool of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaIced conductor motion is induced by the aerodynamic instability of these conductors. The unsteady aerodynamic characteristics are different from the steady aerodynamic characteristics. The unsteady aerodynamic coefficients of typical iced conductors’ models under torsional motion are measured by the unsteady wind tunnel test. The unsteady aerodynamic coefficients of crescent-shape and sector-shape iced 4-bundle conductors under different torsional motion frequencies, wind velocities, and ice thicknesses are obtained. Wind test results show that there are significant differences between the unsteady and steady aerodynamic coefficients. The unsteady aerodynamic coefficients curve is a loop which is different from the steady aerodynamic coefficients. In addition, the obvious differences exist between unsteady aerodynamic coefficients of crescent-shape and sector-shape iced bundle conductors. Critical parameters, including torsional motion frequencies, wind velocity, ice shape, and ice thickness, have significant influences on unsteady aerodynamic coefficients. It shows that the wind tunnel experiment results are able to provide necessary data for the investigation of iced bundle conductor motion and their prevention techniques.http://dx.doi.org/10.1155/2019/2586242 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mengqi Cai Linshu Zhou Hang Lei Hanjie Huang |
spellingShingle |
Mengqi Cai Linshu Zhou Hang Lei Hanjie Huang Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors Advances in Civil Engineering |
author_facet |
Mengqi Cai Linshu Zhou Hang Lei Hanjie Huang |
author_sort |
Mengqi Cai |
title |
Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors |
title_short |
Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors |
title_full |
Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors |
title_fullStr |
Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors |
title_full_unstemmed |
Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors |
title_sort |
wind tunnel test investigation on unsteady aerodynamic coefficients of iced 4-bundle conductors |
publisher |
Hindawi Limited |
series |
Advances in Civil Engineering |
issn |
1687-8086 1687-8094 |
publishDate |
2019-01-01 |
description |
Iced conductor motion is induced by the aerodynamic instability of these conductors. The unsteady aerodynamic characteristics are different from the steady aerodynamic characteristics. The unsteady aerodynamic coefficients of typical iced conductors’ models under torsional motion are measured by the unsteady wind tunnel test. The unsteady aerodynamic coefficients of crescent-shape and sector-shape iced 4-bundle conductors under different torsional motion frequencies, wind velocities, and ice thicknesses are obtained. Wind test results show that there are significant differences between the unsteady and steady aerodynamic coefficients. The unsteady aerodynamic coefficients curve is a loop which is different from the steady aerodynamic coefficients. In addition, the obvious differences exist between unsteady aerodynamic coefficients of crescent-shape and sector-shape iced bundle conductors. Critical parameters, including torsional motion frequencies, wind velocity, ice shape, and ice thickness, have significant influences on unsteady aerodynamic coefficients. It shows that the wind tunnel experiment results are able to provide necessary data for the investigation of iced bundle conductor motion and their prevention techniques. |
url |
http://dx.doi.org/10.1155/2019/2586242 |
work_keys_str_mv |
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1725082492132655104 |