摘要
基于某综合管廊建立燃气舱物理模型,采用CFD方法对天然气泄漏后的湍流燃烧进行数值模拟,分析综合管廊内0、1、2m/s三种不同风速对火灾的影响,得出温度分布及CO2浓度分布。选取风速为1m/s的工况,分析火灾温度分布、气体浓度分布。结果表明:天然气泄漏并燃烧后,火焰温度在轴向和径向均是分层传递的,且径向剖面的温度值分布跨度较大,人员至少距离泄漏口10m才能避免高温灼伤。
A physical model of the gas compartment according to the specific size of a utility tunnel was established,and numerical simulation of turbulent combustion after natural gas leakage was carried out by CFD method.The influence of 0,1,2 m/s wind speed on fire in comprehensive pipe gallery was analyzed,and the temperature distribution and CO2 concentration distribution were obtained.The temperature distribution and gas concentration distribution of fire were analyzed when the wind speed was 1 m/s,the results showed that after natural gas leaks and combusts,the flame temperature transmits in both axial and radial directions in layers.The temperature distribution of the radial section has a large span.Only when the personnel is at least 10 meters away from the leakage can the high temperature burn be avoided.
作者
周庆辉
肖龙
白宗杰
刘李艳
ZHOU Qing-hui;XIAO Long;BAI Zong-jie;LIU Li-yan(School of Mechanical-Electrical and Vehicle Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Engineering Research Center of Monitoring for Construction Safety,Beijing 100044,China;Beijing Municipal Sixth Construction Engineering Co.,Ltd.,Beijing 100023,China)
出处
《消防科学与技术》
CAS
北大核心
2019年第7期946-949,共4页
Fire Science and Technology
基金
住房与城乡建设部科学技术计划项目(2017-K4-021)
北京市属高校基本科研业务费项目(X18114)
关键词
地下综合管廊
天然气泄漏
火灾
数值模拟
utility tunnel
natural gas leakage
fire
numerical simulation
