5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


NUMERICAL INVESTIGATION OF DRAG COEFFICIENTS OF 2-BUNDLED CONDUCTORS

 

Haijiang Xu 1*, Hongzhou Deng 1 and Xing Ma 2

1 Department of Structural Engineering, Tongji University, Shanghai, China

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2 School of Natural and Built Environments, University of South Australia, Adelaide, Australia

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DOI:10.18057/ICASS2018.P.122

ABSTRACT:

Drag coefficients of 2-bundled conductors are investigated by numerical simulation. Parametric analysis of meshing scheme, Y+ and time step size are preliminarily conducted with a two-dimensional circular cylinder model. It is found that Y+ should be within 10~15 and time step size should be no larger than 1/250 of vortex shedding period in transient analysis. An elaborate model with the same aerodynamic shape of real conductors is proposed. Drag coefficients of 2-bundled conductors at varied along-wind and across-wind distances are obtained and compared with wind tunnel test results. In tandem arrangement, shielding effect exists at any distance, while in side-by-side arrangement, shielding effect can be ignored when distances are larger than 8 times conductor diameter. Drag coefficients of 2-bundled conductors are much smaller than specified values in codes. It is suggested that shielding effect should be considered in wind-resistance design of ultra-high voltage transmission lines.

Keywords:

Drag coefficient; 2-bundled conductors; Conductor model; Shielding effect

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IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM