基于3DPIV技术的煤矿模拟巷道烟气流动实验研究  

Experimental study of simulated flue gas flow in coal mine roaduay based on 3DPIV technology

作　　者：邹永洺 王银辉 田富超 赵岳然 ZOU Yongming;WANG Yinhui;TIAN Fuchao;ZHAO Yueran(China Coal Research Institute,Beijing 100013,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Fushun 113122,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿灾害防控全国重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2024年第8期72-79,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(52174229,52174230);国家重点研发计划资助项目(2023YFB3211000);辽宁省自然科学基金资助项目(2022-KF-23-03,2023-MS-355)。

摘　　要：为研究煤矿井下发生火灾时烟气流动的特征,进而准确分析烟气流动状态,模拟了自然状态下烟气在10 s的流动状态,确定发火产烟的大致阶段;利用三维粒子图像测速(3-dimensional Particle Image Velocimetry,3DPIV)技术分别拍摄巷道敞口、密闭以及密闭启封3种状态下固定风速1 m/s风机的启停控制,研究不同条件下烟流的运动情况。结果表明:巷道敞口烟流流动比较简单,而巷道一旦密闭,导致烟气无法扩散,高浓度烟气将会出现复杂的流动变化,如层流、过度流、湍流、逆流以及烟流分叉等现象,巷道密闭启封时会发生烟流“涌出”,此刻烟流流动状态复杂多变,但经过一定时间都会保持烟流稳定。In order to study the characteristics of smoke flow when fire occurs in underground coal mines,and then accurately analyze the state of smoke flow,the flow state of the flue gas in the natural state at 10 s is simulated in this paper to determine the approximate stage of the ignition and smoke production,which is used as a reference for the subsequent experiments;the 3-dimensional particle image velocimetry(3DPIV)was utilized to photograph the open,closed and sealed conditions of the tunnel,and the start/stop control of the fan with a fixed wind speed of 1 m/s was combined to study the motion of the smoke flow under different conditions.The results show that:the open smoke flow of the roadway is relatively simple,and once the roadway is closed,the smoke cannot be diffused,and complex flow changes will occur in high concentration of smoke,such as laminar flow,excessive flow,turbulence,countercurrent and bifurcation of the smoke flow,etc.When the roadway is closed and sealed,the smoke flow"gushing"will occur.At this moment,the flow state of the smoke flow is complex and changeable,but the smoke flow will be stable after a certain period of time.

关 键 词：矿井火灾 烟气流动 模拟巷道 3DPIV 密闭启封 

分 类 号：TD752.2[矿业工程—矿井通风与安全]