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浙江大学学报(工学版)
浙江大学学报(工学版)  2019, Vol. 53 Issue (5): 910-916    DOI: 10.3785/j.issn.1008-973X.2019.05.011
土木与水利工程     
不同流场下钢管输电塔塔身气动力特性
卞荣1(),楼文娟2,*(),李航2,赵夏双3,章李刚3
1. 国网浙江省电力公司经济技术研究院，浙江 杭州 310027
2. 浙江大学 结构工程研究所，浙江 杭州 310027
3. 浙江华云电力工程设计咨询有限公司，浙江 杭州 310027
Aerodynamic characteristics of steel tubular transmission tower in different flow fields
Rong BIAN1(),Wen-juan LOU2,*(),Hang LI2,Xia-shuang ZHAO3,Li-gang ZHANG3
1. State Grid Zhejiang Economic Research Institute, Hangzhou 310027, China
2. Institute of Structural Engineering, Zhejiang University, Hangzhou 310027, China
3. Zhejiang Huayun Electric Power Engineering Design and Consulting Co. Ltd, Hangzhou 310027, China
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摘要：

根据SZ27102钢管输电塔塔身1/3高度处的典型节段截面尺寸，设计制作不同密实度和宽高比的塔身节段模型及迎风面单片桁架模型. 分别在均匀层流场和均匀湍流场下开展高频测力风洞试验，获得迎风面单片桁架体型系数、背风面荷载降低系数和塔身节段体型系数等气动力参数. 结果表明，高湍流度来流条件会导致单片桁架体型系数的减小以及背风面荷载降低系数的增大，从而导致2类流场下钢管塔塔身节段体型系数较接近. 对于单片钢管桁架体型系数，中国规范推荐取值总体小于试验值，且当密实度较小时偏小程度较明显，建议规范考虑密实度对单片钢管桁架体型系数的影响，适当提高单片钢管桁架体型系数；对于背风面荷载降低系数，中国规范取值大于试验值，也大于英国规范取值，建议中国规范对钢管输电塔背风面荷载降低系数做部分调整.
关键词： 钢管输电塔;  塔身节段;  均匀湍流场;  体型系数;  背风面荷载降低系数    
Abstract:

Tower body section and single windward frame models with different solidity ratios and aspect ratios were designed and constructed based on the section size of a typical panel at 1/3 height of SZ27102 steel tubular transmission tower. Wind tunnel tests were carried out in uniform laminar flow and uniform turbulent flow fields based on high-frequency-force-balance technique. The drag coefficients of single windward frames, shielding factors and overall drag coefficients of tower body section were measured and analyzed. Results showed that high intensity turbulence reduced the drag coefficients of single frames and increased the shielding factors, therefore the overall drag coefficients of tower body section measured in two flow fields were almost equal. The drag coefficients of single frames suggested by Chinese code were smaller than the measured values, particularly when the solidity ratio was small. It is suggested that the drag coefficients of single frames in Chinese code should be increased with consideration of the effect of solidity ratio. Some adjustment for the shielding factors are suggested as the values suggested by Chinese code are larger than the measured values and those suggested by British code.
Key words: steel tubular transmission tower    tower body section    uniform turbulent flow field    drag coefficient    shielding factor
收稿日期: 2018-03-30 出版日期: 2019-05-17
CLC:  TU 312  
通讯作者: 楼文娟     E-mail: bianrong1@163.com;louwj@zju.edu.cn
作者简介: 卞荣（1970—），男，高级工程师，从事输电线路设计研究. orcid.org/0000-0002-4221-1231. E-mail: bianrong1@163.com
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卞荣
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引用本文:

卞荣,楼文娟,李航,赵夏双,章李刚. 不同流场下钢管输电塔塔身气动力特性[J]. 浙江大学学报(工学版), 2019, 53(5): 910-916.

Rong BIAN,Wen-juan LOU,Hang LI,Xia-shuang ZHAO,Li-gang ZHANG. Aerodynamic characteristics of steel tubular transmission tower in different flow fields. Journal of ZheJiang University (Engineering Science), 2019, 53(5): 910-916.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.05.011    或    http://www.zjujournals.com/eng/CN/Y2019/V53/I5/910

模型类型 模型编号 b/a $\phi $
单片桁架 1 ? 0.18
2 ? 0.12
3 ? 0.28
4 ? 0.33
塔身节段 5 1.0 0.18
6 1.0 0.12
7 1.0 0.28
8 1.0 0.33
9 1.5 0.18
10 2.0 0.18
表 1  塔身节段及单片桁架模型基本参数
图 1  塔身节段模型试验照片
图 2  节段模型宽高比俯视图
图 3  钢管输电塔节段模型测力风洞试验
图 4  风洞中竖向格栅实物图
图 5  均匀湍流场湍流度剖面
图 6  2类流场下单片桁架体型系数随来流风速的变化
图 7  2类流场下塔身节段体型系数随来流风速的变化
图 8  2类流场下背风面荷载降低系数随来流风速的变化
图 9  单片桁架体型系数随密实度变化
图 10  钢管塔塔身节段体型系数随密实度变化
$b/a$ ${C_{\rm{D}}^{(2)}}$试验值 中国规范（亚临界） 英国规范（亚临界）
${C_{\rm{D}}^{(2)}}$ 偏差 ${C_{\rm{D}}^{(2)}}$ 偏差
1.0 1.97 1.96 ?0.5% 1.73 ?12.2%
1.5 2.01 1.98 ?1.5% 1.73 ?12.6%
2.0 2.14 2.01 ?6.1% 1.74 ?18.7%
表 2  不同宽高比下塔身节段体型系数对比
图 11  钢管塔背风面荷载降低系数随密实度的变化
b/a η试验值 中国规范 英国规范（亚临界）
η 偏差 η 偏差
1.0 0.69 0.88 27.5% 0.57 ?17.4%
1.5 0.72 0.91 26.4% 0.58 ?19.4%
2.0 0.83 0.94 13.3% 0.59 ?28.9%
表 3  不同宽高比下钢管塔背风面荷载降低系数对比
b/a η
$ \phi$=0.1 $ \phi$=0.2 $ \phi$=0.3
1) 注：括号内为中国规范[14]的建议值.
1.0 0.90（1.00）1) 0.75（0.85） 0.70（0.69）
2.0 ? 0.85（0.92） ?
表 4  不同宽高比下钢管塔塔身节段背风面荷载降低系数建议值
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