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Mathematical Problems in Engineering
Volume 2017, Article ID 1628173, 11 pages
https://doi.org/10.1155/2017/1628173
Research Article

Wind Tunnel Tests on Aerodynamic Characteristics of Ice-Coated 4-Bundled Conductors

1China Electric Power Research Institute, Haidian District, Beijing 100192, China
2School of Civil Engineering, Chongqing University, Shapingba District, Chongqing 400030, China
3State Grid East Inner Mongolia Electric Power Company Limited, Hohhot 010020, China
4School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Shapingba District, Chongqing 401331, China

Correspondence should be addressed to Yan Zhi-tao; nc.ude.uqc@oatihznay

Received 20 February 2017; Revised 4 June 2017; Accepted 9 July 2017; Published 4 October 2017

Academic Editor: Yuri Vladimirovich Mikhlin

Copyright © 2017 Li Xin-min et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Wind tunnel tests were carried out to obtain the static aerodynamic characteristics of crescent iced 4-bundled conductors with different ice thicknesses, initial ice accretion angles, bundle spaces, and wind attack angles. The test models were made of the actual conductors and have a real rough surface. Test results show that the influence of wake interference on the drag coefficients of leeward subconductors is obvious. The interference angle range is larger than 20° and the drag coefficient curves of leeward subconductors have a sudden decrease phenomenon at some certain wind attack angles. The absolute value of the lift and moment coefficient increases with the increase of the ice thickness. In addition, the galloping of the iced subconductor may occur at the angle of wind attack near ±20° and the wake increases the moment coefficient. The variation of initial ice accretion angle has a significant influence on the aerodynamic coefficients. The aerodynamic coefficient curves exhibit a “moving” phenomenon at different initial ice accretion angles. The bundle spaces have a great influence on the moment coefficient of leeward thin ice-coated conductors. With the increase of ice thickness, the bundle spaces generally have little influence on the aerodynamic coefficients.