Wind and Structures

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Aerodynamic force characteristics and galloping analysis of iced bundled conductors

  • Lou, Wenjuan (Institute of Structural Engineering, Zhejiang University) ;
  • Lv, Jiang (Institute of Structural Engineering, Zhejiang University) ;
  • Huang, M.F. (Institute of Structural Engineering, Zhejiang University) ;
  • Yang, Lun (Institute of Structural Engineering, Zhejiang University) ;
  • Yan, Dong (Henan electric power testing and research institute)
  • Received : 2013.05.23
  • Accepted : 2013.10.15
  • Published : 2014.02.25
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Abstract

Aerodynamic characteristics of crescent and D-shape bundled conductors were measured by high frequency force balance technique in the wind tunnel. The drag and lift coefficients of each sub-conductor and the whole bundled conductors were presented under various attack angles of wind. The galloping possibility of bundled conductors is discussed based on the Den Hartog criterion. The influence of icing thickness, initial ice accretion angle and sub-conductor on the aerodynamic properties were investigated. Based on the measured aerodynamic force coefficients, a computationally efficient finite element method is also implemented to analyze galloping of iced bundled conductors. The analysis results show that each sub-conductor of the bundled conductor has its own galloping feature due to the use of aerodynamic forces measured separately for every single sub-conductors.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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