基于FDS的不同狭缝火旋风模拟研究  

Simulation study on the fire whirl under different slit based on FDS

作　　者：李迁[1,2,3] 朱国庆[1,2,3] 李俊毅[1,2,3] LI Qian ZHU Guo-qing LI Jun-yi(Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Jiangsu Xuzhou 221116, China Faculty of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China Fire Research Institute, China University of Mining and Technology, Jiangsu Xuzhou 221116, China)

机构地区：[1]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国矿业大学消防工程研究所,江苏徐州221116

出　　处：《消防科学与技术》2016年第10期1359-1362,共4页Fire Science and Technology

基　　金：江苏省自然科学基金资助项目(BK20131117);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：研究用Pyrosim火灾模拟软件基于FDS模拟不同狭缝宽度对火旋风的影响。选取狭缝宽度分别为80、200、320、450mm进行模拟,并利用Tecplot360软件绘制出温度等值线图,进行分析比较。结果表明:狭缝宽度为80mm时热释放速率最大,320mm时热释放速率最小;450 mm时温度最高,80mm时温度最低;450mm时火焰高度最高,80mm时火焰高度最低且是间歇火旋风;450mm时最先形成火旋风,200mm时最后形成,80mm除外。从计算机模拟图片及绘制的等值线图中可以看出火旋风形成的位置,其移动方向为逆时针方向。The influence of width of slit on the fire whirl was studied by Pyrosim based on FDS.The width of slits were 80,200,320 and 450 mm.The temperature contour lines were drawn by Tecplot360 to be analyzed.The results showed that the fire had the biggest heat release rate,the lowest temperature and the lowest flame height when the width of slit was 80 mm,and the fire whirl was intermittent.The fire had the smallest heat release rate when the width of slit was 320 mm,had the highest temperature and the highest flame when the width of slice was 450 mm.The fire whirl appeared first when the width of slice was 450 mm and last when the width of slice was200 mm.There was no fire whirl when the width of slice was80 mm.The fire had counter-clockwise direction and its position was shown in simulation picture and temperature contour lines picture.

关 键 词：火旋风 FDS 等值线 热释放速率 温度 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]