A study on dynamic aerodynamic characteristics of an iced conductor in pulsating wind field

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 150-155.

WEI Yuanwu1,GUO Tao1,ZHANG Pengcheng2,YANG Liugui1,YAN Ermei1,XU Lianggang1,WANG Lu2,ZHU He2

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Abstract

The conductor becomes a non-circular section after icing, and the distribution of pressure and velocity around it is complicated.The traditional method of using quasi-static hypothesis to analyze dynamic galloping theoretical formula of icing conductors has strong limitations.Considering the dynamic changes of wind field, based on the weak coupling method, the secondary development was carried out by using Fluent.The galloping trajectory, angle of attack and wind speed of a conductor were programmed and controlled.The static and dynamic aerodynamic simulation of the iced conductor was realized by using overlapping grid technology, and the aerodynamic coefficients were analyzed.The simulation results show that when the average wind speed is the same, the aerodynamic coefficients of 8% turbulence fluctuating wind have the same trend as the aerodynamic coefficients of steady wind field, but mutation occurs near the wind attack angle of 15 degrees; the dynamic aerodynamic coefficients of conductors in lateral galloping are obviously larger than the static values.Taking the wind attack angle of 45 degrees as the object of analysis, the torsional vibration of conductors leads to the decrease of aerodynamic coefficients and frequencies.The dynamic aerodynamic coefficients of ice-covered conductors vary very complex when they gallop, so the prediction of galloping amplitude and tension by static aerodynamic coefficients in engineering is erroneous.

Key words

fluctuating wind field / dynamic aerodynamic coefficient / secondary development / overset grid / transverse torsion coupling

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WEI Yuanwu1,GUO Tao1,ZHANG Pengcheng2,YANG Liugui1,YAN Ermei1,XU Lianggang1,WANG Lu2,ZHU He2. A study on dynamic aerodynamic characteristics of an iced conductor in pulsating wind field[J]. Journal of Vibration and Shock, 2020, 39(24): 150-155

References

[1] Den Hartog J P．Transmission line vibration due to sleet［J］．Transaction AIEE，1932，51( 4) : 1074－1086．
[2] Nigol O，Clarke G J．Conductor galloping and its control basedon torsional mechanism［J］．Ontario Hydro ResearchQuarterly，1974，26( 2)：31－41．
[3] Yu P，Popplewell N，Shah A．H．Instability trends of inertiallycoupled galloping ［J］． Journal of Sound and Vibration，1995，183( 4) : 663－678．
[4] 蔡萌琦，严波，吕欣，周林抒，阎东，陈瑞. 覆冰四分裂导线空气动力系数数值模拟[J]. 振动与冲击，2013，32(05)：132-137.
Cai Mengqi，Yanbo，Lu Xin, Zhou Linwei，Yandong，Chen Rui. Numerical simulation of aerodynamic coefficients of ice-covered four-splitted conductors [J]. Vibration and impact，2013，32 (05)： 132-137.
[5] Kimura K M，Inoue Y，Fujino T，et al．Unsteady forces onan ice-accreted four-conductor bundle transmission line［C］//Proc．of the 10th Int．Conference on Wind Engineering，Copenhagen

( Denmark ) ，Wind Engineering into the 21stCentury，Eds．A．Larsen，GL．Larose and F．M．Livesey，A．A．Balkema，1999: 467－472．
[6] Shimizu M，Ishihara T，Phuc P V． A wind tunnel study onsteady and unsteady aerodynamic characteristics of ice-accreted transmission lines ［C ］/ / Proc． of the 18thSymposium on Wind Engineering，Tokyo ( Japan ) ，2004：245-250.
[7] 李万平. 覆冰导线群的动态气动力特性[J]. 空气动力学学报，2000(04)：413-420.
Li Wanping. Dynamic aerodynamic characteristics of iced conductors [J]. Journal of Aerodynamics，2000 (04)：413-420.
[8] 张喆，杨秀萍，郝淑英. 覆冰导线动态气动力特性模拟与分析[J].振动与冲击，2015，34(07)：209-214.
Zhang Zhe，Yang Xiuping，Hao Shuying. Dynamic aerodynamic characteristics simulation and analysis of iced conductors [J]. Vibration and impact，2015，34 (07)：209-214.
[9] 楼文娟，余江，姜雄，卢明，吕中宾. 覆冰导线三自由度耦合舞动稳定性判定及气动阻尼研究[J]. 土木工程学报，2017，50(02)：55-64.
Lou Wenjuan，Yu Jiang，Jiang Xiong，Lu Ming，Lu Zhongbin. Judgment of Three-DOF Coupled Dancing Stability and Aerodynamic Damping of Iced Conductor [J]. Journal of Civil Engineering，2017， 50 (02)：55-64.
[10] 姜雄，楼文娟. 三自由度体系覆冰导线舞动激发机理分析的矩阵摄动法[J]. 振动工程学报，2016，29(06)：1070-1078.
Jiang Xiong，Lou Wenjuan. Matrix perturbation method for analysis of galloping excitation mechanism of ice-covered conductor in three-degree-of-freedom system [J]. Journal of Vibration Engineering，2016，29 (06)：1070-1078.
[11] 楼文娟，姜雄，杨伦. 三维瞬态风场下覆冰导线舞动响应研究[J].振动与冲击,2016，35(22)：1-9.
Lou Wenjuan，Jiang Xiong，Yang Lun. Study on galloping response of iced conductors under three-dimensional transient wind field [J]. Vibration and impact，2016，35(22)：1-9.
[12] 任军. 正弦风场覆冰导线动态气动力特性研究[D]. 天津理工大学，2016.
Ren Jun. Dynamic aerodynamic characteristics of iced conductors in sinusoidal wind field [D]. Tianjin University of Technology，2016.
[13] 徐倩，蔡萌琦，周林抒，严波，王清远. 湍流度对覆冰八分裂导线舞动的影响分析[J]. 空气动力学学报，2018，36(06)：949-957.
Xu Qian，Cai Mengqi，Zhou Linwei，Yanbo，Wang Qingyuan. Effect of turbulence on galloping of ice-covered eight-split conductors [J]. Journal of Aerodynamics，2018, 36 (06)： 949-957.
[14] 范孜. 覆冰分裂导线的动力学特性研究[D]. 天津理工大学，2012.
Fan Zi. Dynamic characteristics of ice-covered split conductors [D]. Tianjin University of Technology，2012.
[15] 严波，胡景，周松，张宏雁. 覆冰四分裂导线舞动数值模拟及参数分析[J]. 振动工程学报，2010，23(03)：310-316.
Yan Bo，Hu Jing, Zhou Song，Zhang Hongyan. NUMERICAL SIMULATION AND PARAMETER ANALYSIS OF ICED FOUR-SEGMENTED TRANSMISSION [J]. Journal of Vibration Engineering，2010，23 (03)：310-316.