船舶通道火灾一维网络模型方法  

Mono-dimensional network model approaches for ships passages

作　　者：轩少永[1] 焦宇[2] 汪金辉[2] 宋天祥[2] 

机构地区：[1]上海海事大学商船学院,上海201306 [2]上海海事大学海洋科学与工程学院,上海201306

出　　处：《消防科学与技术》2017年第2期162-166,共5页Fire Science and Technology

基　　金：国家自然科学基金项目(51109127);上海市自然科学基金资助项目(16ZR1414600);上海海事大学学术创新团队基金(A2-0201150404);2016中国消防协会科学技术年会"青年消防学者论坛"交流论文

摘　　要：选取某大型货船中的典型通道构建基于FDS的场模型和基于MFIRE的一维网络模型,进行船舶通道火灾的场模拟和网络模拟。对比FDS与MFIRE的烟气运动模拟结果表明:0~360s,MFIRE不能真实反映通道内热烟气的物理特性;360~600s,通道e_1、e_2、e_3的MFIRE结果同FDS结果的流量误差为9%、64%、1%,温度误差为6%、37%、3%。MFIRE模拟所需时间不到FDS的1%。通道内烟气的温度梯度越大,MFIRE模拟结果的精度越低。对于大型船舶火灾,MFIRE适用于火灾趋于稳定的情况下,模拟远离火源区域的通道烟气蔓延情况。Field simulation and network simulation of passages in large cargo ship during fire were taken based on CFD method （FDS） ~and mono-dimensional network method （MFIRE）. The results indicated that the volume flow and temperatures before 360 s obtained from MFIRE approach can not represent the physical characteristics of smoke flow in passages; In 360~600 s, the difference of simulation values between MFIRE and FDS is 90%, 64%, 1% by volume flow rate and 6%, 37%, 3% by temperature. MFIRE uses less than 1% of the overall CPU time of FDS. The bigger the temperature gradient of the smoke inside the passages, the lower the accuracy of the MFIRE. MFIRE is an effective tool for steady fire that can be applied to simulate the physical characteristics of smoke in passages far a- way from fire source in large ships.

关 键 词：船舶通道 火灾 一维网络模型 场模型 数值模拟 

分 类 号：X913.4[环境科学与工程—安全科学] U674.13[交通运输工程—船舶及航道工程]