作者：李尧斌1,2, 敬文霞1,2, 薛生1,2, 郑春山1,2, 袁宏永3, 付明3
作者单位：1. 安徽理工大学 省部共建深部煤矿采动响应与灾害防控国家重点实验室，安徽 淮南 232001;
2. 安徽理工大学能源与安全学院，安徽 淮南 232001;
3. 清华大学合肥公共安全研究院，安徽 合肥 230000
关键词：泄漏检测;泄漏声源特性;声波法;泄漏孔孔形
摘要：
为研究泄漏孔孔形对输气管道泄漏声源特性的影响，利用输气管道泄漏声波测试实验平台，开展圆形孔、三角形孔、矩形孔和不规则形孔的泄漏实验。结果表明，不同孔形的泄漏声源频谱均在50~52 kHz范围内存在突出频响。管道压力的增加导致气体动量发生变化，圆形孔的幅值和平均信号电平（ASL）值随压力的增加呈线性规律增加，振铃计数随压力增加呈先增后减的变化趋势。矩形孔、三角形孔和不规则形孔的幅值、ASL值、振铃计数随着压力增加都呈先增后减的变化趋势；孔形的不同影响气体撞击作用，圆形孔的幅值、ASL值、振铃计数小于其他3种孔形的幅值、ASL值、振铃计数。该实验结论有助于输气管道泄漏研究的深化，为声波检测法的开发和应用提供参考依据。
Influence of leakage hole shape on the leakage sound source characteristics of gas pipeline
LI Yaobin1,2, JING Wenxia1,2, XUE Sheng1,2, ZHENG Chunshan1,2, YUAN Hongyong3, FU Ming3
1. State Key Laboratory of Deep Coal Mine Mining Response and Disaster Prevention and Control, Anhui University of Science and Technology, Huainan 232001, China;
2. School of Energy and Security, Anhui University of Science and Technology, Huainan 232001, China;
3. Hefei Institute of Public Safety Reserach, Tsinghua University, Hefei 232000, China
Abstract: In order to study the influence of the shape of leakage holes on the characteristics of the sound source of leakage in the gas transmission pipeline, the leakage experiments of circular holes, triangular holes, rectangular holes and irregular holes were carried out by using the test platform of sound wave leakage in the gas transmission pipeline. The experimental results show that there are prominent frequency responses in the range of 50-52 kHz in different holes. The increase of pipeline pressure leads to the change of gas momentum. The amplitude and average signal level (ASL) of the circular hole increase linearly with the increase of pressure, and the ringing count increases first and then decreases with the increase of pressure. The amplitude, ASL value and ringing count of rectangular hole, triangle hole and irregular hole increases first and then decreases with the increase of pressure. The amplitude, ASL value and ringing count of the circular hole are smaller than the amplitude, ASL value and ringing count of the other three types of hole. The experimental results are helpful to the research of gas pipeline leakage and provide reference for the development and application of acoustic detection method.
Keywords: leak detection;leakage source characteristics;acoustic method;leakage hole shape
2020, 46(11):139-145 收稿日期: 2020-02-16;收到修改稿日期: 2020-04-03
基金项目: 国家“十三五”重点研发资助项目（2018YFC080800）；清华大学合肥公共安全研究院院士工作站课题（2017K001）
作者简介: 李尧斌(1981-),男,浙江东阳市人,副教授,博士,主要从事瓦斯灾害防治技术研究
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