典型密闭小空间的氮气灭火效能分析与仿真  

Simulation of Nitrogen Fire Extinguishing Efficiency in Typical Small Confined Space

作　　者：陈国锋 李盼 俞健[1] 黄琨 赵宗凯 张宇伦 CHEN Guo-feng;LI Pan;YU Jian;HUANG Kun;ZHAO Zong-kai;ZHANG Yu-lun(Wuhan Second Ship Design and Research Institute,Wuhan 430064,China;Faculty of Engineering,China University of Geoscience(Wuhan),Wuhan 430074,China)

机构地区：[1]武汉第二船舶设计研究所,武汉430064 [2]中国地质大学(武汉)工程学院,武汉430074

出　　处：《船海工程》2025年第2期1-5,共5页Ship & Ocean Engineering

基　　金：国家自然科学基金(51839005);工信部高技术船舶科研项目(CB05N20);国家资助博士后研究人员计划C档(GZC20241593);湖北省博士后项目(2024HBBHCXA090)。

摘　　要：针对舰船密闭空间火灾及氮气灭火效能问题,以舰船小型密闭空间为研究对象,研究氮气灭火系统效能。通过理论分析,确定火灾燃烧及氮气释放时空间内氧气浓度变化规律,考虑火源设置及不同燃烧条件下氧气含量变化。构建物理和数值模型,模拟小型房间火灾场景,设置不同灭火剂喷放时间,通过FDS对典型小空间的火灾场景进行数值仿真计算。结果表明,空间内的氧气浓度变化规律、燃烧终止时间的数值模拟结果与理论预测值一致,喷射时间越短灭火越早。Aiming at the problems of fire and nitrogen extinguishing efficiency in confined space of ships,a small confined space of ships was taken as the research object to study the efficiency of nitrogen extinguishing system.Through theoretical analysis,the variation law of oxygen concentration in space during fire combustion and nitrogen release was determined,considering fire source settings and oxygen content changes under different combustion conditions.Physical and numerical models were established to simulate fire scenes in small rooms,and different extinguishing agent discharge times were set.Numerical simulation was carried out for typical small space fire scenes through FDS.The results showed that the variation of oxygen concentration in space and the numerical simulation results of combustion termination time are consistent with the theoretical predicted values,and the shorter the injection time,the earlier the fire extinguishing.

关 键 词：氮气灭火系统 效能分析 理论计算 数值仿真 

分 类 号：U698.4[交通运输工程—港口、海岸及近海工程]