狭长受限空间火灾蔓延及烟气特性实验  

Experiment on fire spread and smoke characteristics in a narrow confined space

作　　者：王喆 安伟光 唐艳华 徐剑坤[1] WANG Zhe;AN Weiguang;TANG Yanhua;XU Jiankun(School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《实验技术与管理》2024年第1期143-149,共7页Experimental Technology and Management

基　　金：国家自然科学基金面上项目(51974298);中国矿业大学教学研究项目(2022ZDKT02-208,2022ZDKT02-103);中国矿业大学实验技术研究与开发一般项目(S2023Y001);煤炭行业高等教育研究课题重点项目(2021MXJG064)。

摘　　要：狭长受限空间的火羽流及烟气层行为与常规建筑存在显著差异,其火源燃烧行为和烟气蔓延特性在热安全工程领域具有重要科学意义。开展研究性实验教学是实现消防工程专业培养目标的重要手段,为了提升实际教学效果,建立了融合“虚拟-实体、科研-教学、理论-实验”三位一体的实验教学方案。采用中尺寸实验平台进行火灾实验,按照实验设计、系统搭建、实验操作、教学结果来整体安排实体实验;通过Pyro Sim建立虚拟仿真场景、采用FDS进行模拟计算、通过场模拟图记录实验教学结果,使学生感知火灾发生发展的动态过程。通过实验展现了抽象理论知识的立体形态,有效地培养了学生的创新实践能力。[Objective]Long-narrow confined spaces,while facilitating the mobility and daily lives of urban and rural residents,also pose fire safety concerns.Catastrophic combustion phenomena in such a space can result in significant casualties and property damage.Owing to the coupling effect of the long-narrow space and longitudinal ventilation,the fire plume and smoke layer behavior significantly differ from that of conventional buildings.Therefore,studying fire behavior and smoke spread characteristics under limited boundary conditions holds great scientific significance in thermal safety engineering.Research-oriented experimental teaching plays a crucial role in achieving the educational goals of fire engineering majors.Through scientific research-expanding experiments,students can consolidate and deepen their understanding of combustion science,fire dynamics,and smoke control engineering.It also improves students’independent analysis,problem-solving,comprehensive design,and innovation abilities.Furthermore,a trinity experimental teaching program was established to improve the practical teaching effect by integrating virtual entities,scientific research teaching,and theory experiments.This teaching approach involves conducting physical experiments to observe phenomena,record data,and analyze results.The virtual experiment establishes a virtual simulation scene to simulate the computational fluid dynamics of fluid motion in a fire,uses numerical methods to solve the NS equation of low Mach number flow driven by fire buoyancy,and observes the dynamic flow field parameters through the field simulation results.Building a full-scale test platform for fire science research considering the unique characteristics and high aspect ratio of a long-narrow confined space is difficult.Therefore,downscale experiments are commonly used because of their convenience and cost-effectiveness.[Methods]In this paper,a medium-scale experimental platform is selected for the experimental teaching program.Using a medium-sized experimental platf

关 键 词：狭长受限空间 火灾蔓延 烟气特性 实验教学 

分 类 号：X932[环境科学与工程—安全科学]