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[1]宋莹,王东,郭欣,等.突扩巷道流场风流分布特征的PIV实验研究[J].中国安全生产科学技术,2017,13(6):86-91.[doi:10.11731/j.issn.1673-193x.2017.06.014]
　SONG Ying,WANG Dong,GUO Xin,et al.Experimental study on airflow distribution characteristics of flow field in sudden enlarged roadway based on PIV[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(6):86-91.[doi:10.11731/j.issn.1673-193x.2017.06.014]
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突扩巷道流场风流分布特征的PIV实验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年6期
页码:
86-91
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-06-30

文章信息/Info

Title:
Experimental study on airflow distribution characteristics of flow field in sudden enlarged roadway based on PIV
文章编号:
1673-193X(2017)-06-0086-06
作者:
宋莹1; 王东2; 3; 郭欣2; 3; 杨率2; 3; 陈章良1; 史俊伟1
1.山东工商学院 管理科学与工程学院，山东 烟台 264005；2.辽宁工程技术大学 安全科学与工程学院，辽宁 葫芦岛 125105；3.矿山热动力灾害与防治教育部重点实验室，辽宁 葫芦岛 125105
Author(s):
SONG Ying1;  WANG Dong2; 3;  GUO Xin2; 3;  YANG Shuai2; 3;  CHEN Zhangliang1;  SHI Junwei1
1. College of Management Science and Engineering, Shandong Institute of Business and Technology, Yantai Shandong 264005, China; 2. College of Safety Science and Engineering, Liaoning Technical University, Huludao Liaoning 125105, China; 3. Key Laboratory of Mine Thermo-motive Disaster and Prevention, Ministry of Education, Huludao Liaoning 125105, China
关键词:
突扩巷道; PIV; 断面; 风速分布; 涡流
Keywords:
sudden enlarged roadway;  PIV;  cross-section;  wind speed distribution;  vortex
分类号:
TD723
DOI:
10.11731/j.issn.1673-193x.2017.06.014
文献标志码:
A
摘要:
针对传统接触式瞬时速度测量方法的局限性，采用非接触测量技术粒子图像测速仪（PIV）获得了突扩巷道流场纵向截面风流分布特征。实验表明:瞬态风流分布“瞬息万变”，而时均流场中，突扩前平直巷道时均速度流线基本呈平滑直线，突扩后上下隅角有大涡存在，但呈现不对称分布，并且涡流区内风流方向极不稳定，且风速值相对于主流风速很低，约在-0.6~0.6 m/s之间波动，表明在煤矿井下测风时可以有条件地忽略涡流区；受突扩大涡湍流脉动影响，风流在距离突扩界面150 mm处开始呈现上扬趋势，突扩断面纵对称轴上风速分布峰值拐点发生了震荡性偏移;当下隅角回流区结束后，风速分布峰值拐点渐渐下移并逐渐呈现对称趋势，回流区内断面风速整体呈现出“Ω”型分布形式。为井下更为复杂的风流湍流流动研究提供了实验理论基础。
Abstract:
Aiming at the limitations in traditional contact measurement methods of instantaneous speed, the airflow distribution characteristics of flow field in the longitudinal cross-section of the sudden enlarged roadway were obtained by using the non-contact measurement technology of particle image velocimetry (PIV). The experimental results showed that the transient airflow distribution was constantly changing, but in the time-averaged flow field, the streamline of the time-averaged wind speed in the straight roadway before the sudden enlargement was basically a smooth line. The large vortices existed in the upper and lower corners after the sudden enlargement, but presented the asymmetric distribution. The airflow direction was very unstable in the vortex region, and the wind speed was very low compared to the main flow wind speed, with a fluctuation in the range of -0.6 m/s to 0.6 m/s, which indicated that the vortex region can be neglected conditionally when measuring wind in underground coal mine. Under the influence of the large vortex turbulence pulsation in the sudden enlargement, the airflow began to rise at a distance of 150 mm from the sudden enlargement interface, and the peak inflection point occurred a shock deviation on the longitudinal symmetry axis of the sudden enlarged cross-section. At the end of the recirculation region in the lower corner, the peak inflection point of the wind speed distribution decreased and presented a symmetrical trend gradually. The wind velocity of the cross-section showed the "Ω" type distribution form as a whole in the recirculation region. It provides the experimental and theoretical basis for the research on more complicated turbulent airflow in underground mine.

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备注/Memo

备注/Memo:
国家自然科学基金项目（51574142）
更新日期/Last Update: 2017-07-11