基于Fluent的地下管廊液氮灭火数值模拟方法  

Numerical simulation method of liquid nitrogen fire extinguishing in underground pipe gallery based on Fluent

作　　者：张志伟[1] 张国维[1,2] 朱国庆[1] 袁狄平 郭栋 ZHANG Zhiwei;ZHANG Guowei;ZHU Guoqing;YUAN Diping;GUO Dong(Institute of Public Safety and Fire Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Shenzhen Institute of Safety,China University of Mining and Technology,Shenzhen Guangdong 518000,China;Shenzhen Research Institute of Urban Public Safety Technology,Shenzhen Guangdong 518000,China)

机构地区：[1]中国矿业大学公共安全与消防研究所,江苏徐州221116 [2]中国矿业大学深圳研究院,广东深圳518000 [3]深圳市城市公共安全技术研究院,广东深圳518000

出　　处：《中国安全科学学报》2022年第8期133-139,共7页China Safety Science Journal

基　　金：山东省重大科技创新工程项目(2021CXGC011303);国网河北省电力有限公司科技项目(kj2020-041)。

摘　　要：为更好地研究液氮的灭火特性,提出基于Fluent软件的地下管廊液氮灭火数值模仿方法,并研究其适用性。首先,搭建缩尺寸地下管廊液氮灭火试验平台,通过改变注氮方向和注氮距离,开展地下管廊液氮灭火试验,以便得到数值模拟所需的输入参数和验证数据;然后,确定基于Fluent软件的数值模拟方法,用该方法开展与试验同工况的数值模拟,并对比二者结果。研究表明:该数值模拟结果与试验数据有较好的一致性;管廊顶棚不同位置处温度的变化趋势与试验一致,误差最低约为4.7%;管廊底部O_(2)体积分数的模拟效果与注氮距离有关,注氮距离越近,模拟效果越好,误差最低为0.3%,最高为15.3%。In order to better study the fire extinguishing characteristics of liquid nitrogen,a numerical simulation method of liquid nitrogen fire extinguishing in underground pipe gallery based on Fluent software was proposed and its applicability was studied.First of all,a scaled test platform for liquid nitrogen fire extinguishing of underground pipe gallery was built,and the liquid nitrogen fire extinguishing test was carried out by changing the direction and distance of the nitrogen injection,so as to obtain the input parameters and verification data required for the numerical simulation.Then,the numerical simulation method based on Fluent software was determined,and the corresponding numerical simulation was carried out,and the results were compared.The research results show that the numerical simulation results are in good agreement with the test data.And the variation trend of temperature at different positions of the pipe gallery roof is consistent with the test,and the minimum error is about 4.7%.The simulation effect of the O_(2) volume fraction at the bottom of the pipe gallery is related to the nitrogen injection distance,the closer the nitrogen injection distance is,the better the simulation effect is.The minimum error is 0.3%,and the maximum error is 15.3%。

关 键 词：地下管廊 液氮 灭火试验 数值模拟 Fluent软件 

分 类 号：X932[环境科学与工程—安全科学]