Abstract
Aiming at that the wind tunnel tests on aerodynamic characteristics of iced conductors were not systematic enough, the wind tunnel test for different icing types was conducted to study the aerodynamic characteristics of iced conductors more systematically. It can accounts for the characteristics of structure and wind field. The aerodynamic characteristics of different icing types such as crescent, fan and corona shapes with different icing thickness were obtained, and the effect of mean wind speed, turbulence and two-dimensional flow on aerodynamic characteristics were also investigated. It is concluded that the icing shapes have much effect on aerodynamic characteristics. The aerodynamic characteristics of rigid segment model with crescent-shaped are regular, while these of corona-shaped and fan-shaped have more peaks and troughs. In addition, the aerodynamic instability of iced conductors is more pronounced in turbulence. Furthermore, the wind speed has significant effects on drag coefficient, but the effects on lift coefficient is little.
Highlights
Galloping is a self-excited instability related to slender structures with non-circular cross-sections
Since galloping of iced conductors is one type of wind-induced vibration owing to aerodynamic instability, research on aerodynamic characteristics of iced conductors is essential to solve the matters
The wind tunnel test is an important means for aerodynamic research, and many wind tunnel experiments have been carried out since galloping was discovered
Summary
Galloping is a self-excited instability related to slender structures with non-circular cross-sections. The wind tunnel test is an important means for aerodynamic research, and many wind tunnel experiments have been carried out since galloping was discovered. Li Li et al.: Wind Tunnel Test Research on Aerodynamic Characteristics of Iced Conductors wind tunnel experiments, which analyzed the galloping Stability of Porous H-section beams. W. Lou et al [11] carried out wind tunnel test to study the galloping of an ice-coated D-shape sectional model of 6-bundled conductors. You Yi et al [14] conducted wind tunnel test to study the aerodynamic characteristics of crescent and D-shape iced conductor with different wind velocities, wind attack angles and torsional elastic support stiffness. This paper presents a force measurement test of segment models to study the aerodynamic characteristics of iced conductors.
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