Aerodynamic Characteristics Analysis of Smooth Circular and Non Smooth Circular Ice-coated Conductors

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Aerodynamic Characteristics Analysis of Smooth Circular and Non Smooth Circular Ice-coated Conductors

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[1]ZHAO Guifeng,WEI Danyang,ZHANG Meng.Aerodynamic Characteristics Analysis of Smooth Circular and Non Smooth Circular Ice-coated Conductors[J].Journal of Zhengzhou University (Engineering Science),2022,43(06):57-63.[doi:10.13705/j.issn.1671-6833.2022.06.002]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43卷 Number of periods: 2022 06 Page number: 57-63 Column: Public date: 2022-09-02

Title:: Aerodynamic Characteristics Analysis of Smooth Circular and Non Smooth Circular Ice-coated Conductors

Author(s):: ZHAO Guifeng; WEI Danyang; ZHANG Meng; School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China

Keywords:: aerodynamic characteristics; smooth and non smooth fine conductor; ice-coated conductors; wind attack angle; vortex shedding

CLC:: TM726

DOI:: 10.13705/j.issn.1671-6833.2022.06.002

Abstract:: Most of the existing simulation studies on the wind-induced vibration of ice-coated conductors simplify the conductor to an ideal smooth circular section and accept its aerodynamic characteristics, but the section characteristics of the actual conductor twist are not considered enough. In this study, Fluent software is used to study the aerodynamic characteristics of ice-coated smooth circular and non smooth circular twisted section conductors, and to analyze the characteristics and differences of their aerodynamic coefficients at different wind speeds, icing thickness, icing shape and conductor diameter. The results showed that the aerodynamic coefficients of ice-coated conductors with two sections were quite different, among which the maximum relative deviation of drag coefficient and torsion coefficient could reach 100%, and the maximum relative deviation of lift coefficient could reach -175%.The use of non smooth circular twisted section conductor could increase the number of vortex shedding in the cycle and made its fluctuation more violent. When the icing was crescent shaped, the smooth circular section conductor could underestimate the downwind displacement and overestimate the crosswind displacement of the conductor. When the icing was D-shaped, the fluctuation of smooth circular section conductor was smoother and more regular than that of non smooth circular twisted section, which could overestimate the downwind displacement and underestimate the crosswind displacement. In view of the large differences in aerodynamic force, vortex shedding diagram and displacement response between the two types of coated ice conductors, the influence of conductor cross-section stranded characteristics on aerodynamic force should be considered in the fine wind resistance design of coated ice transmission line system.

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Last Update: 2022-10-03