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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)  2017, Vol. 51 Issue (8): 1494-1499    DOI: 10.3785/j.issn.1008-973X.2017.08.003
Civil and Traffic Engineering     
Experimental study on aeolian noise generated by transmission lines using wind tunnel testing
ZHANG Yang1, SHEN Guo-hui1, YU Shi-ce1, MA Yu-cong2, ZHANG Rui2
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
2. State Grid Corporation Wenzhou Electric Power Company, Wenzhou 325000, China
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Abstract  

An acoustic wind tunnel for the noise experiments was developed in order to analyze the aeolian noise generated by transmission lines. The aeolian noise of a smooth circular cylinder was tested to identify the experiment results of the wind tunnel. The aeolian noise test of a conductor and a shielding wire in different wind speed was conducted. The noise reduction countermeasure of transmission lines bound with spiral rod was analyzed. Results show that the developed wind tunnel has fine acoustics characteristics and is suitable for acoustic testing. The peak frequencies of the circular cylinder's noise increase with the wind speeds and the Strouhal numbers calculated from the frequencies are 0.2. The sound pressure level of the conductor is larger than that of the shielding wire in lower wind speed, but the A-weighted sound pressure level of the conductor is smaller than that of the shielding wire in higher wind speed. The countermeasure of transmission lines bound with spiral rod has a significant effect on the noise reduction, in which the maximum A-weighted reduction is more than 10 dB(A).

Received: 20 June 2016      Published: 16 August 2017
CLC:  TU312  
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Cite this article:

ZHANG Yang, SHEN Guo-hui, YU Shi-ce, MA Yu-cong, ZHANG Rui. Experimental study on aeolian noise generated by transmission lines using wind tunnel testing. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1494-1499.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2017.08.003     OR     http://www.zjujournals.com/eng/Y2017/V51/I8/1494


输电线风噪声的声学风洞试验

针对输电线的风噪声问题，研制用于风致噪声试验的声学风洞，测试光滑圆柱杆件的风噪声以校验风洞试验的测试结果，进行不同风速下的导线和地线风噪声试验，研究输电线缠绕扰流线的抑噪措施.结果表明：研制的声学风洞具有很好的声学特性，适用于输电线的风噪声研究；圆柱风噪声的卓越频率随着风速的增加而增大，通过卓越频率反算所得的斯托罗哈数为0.2；较低风速时导线的声压级比地线大，较高风速时导线的A计权声压级小于地线；输电线缠绕扰流线后具有很好的降噪效果，最高A声级降噪水平大于10 dB.

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