[1]童艳,施明恒,何嘉鹏.单室火灾烟气运动的双层区域模拟[J].东南大学学报(自然科学版),2008,38(3):449-453.[doi:10.3969/j.issn.1001-0505.2008.03.017]
 Tong Yan,Shi Mingheng,He Jiapeng.Two-layer zonal modeling of smoke movement in single fire room[J].Journal of Southeast University (Natural Science Edition),2008,38(3):449-453.[doi:10.3969/j.issn.1001-0505.2008.03.017]
点击复制

单室火灾烟气运动的双层区域模拟()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第3期
页码:
449-453
栏目:
能源与动力工程
出版日期:
2008-05-20

文章信息/Info

Title:
Two-layer zonal modeling of smoke movement in single fire room
作者:
童艳12 施明恒1 何嘉鹏2
1 东南大学能源与环境学院, 南京 210096; 2 南京工业大学城市建设与安全环境学院, 南京 210009
Author(s):
Tong Yan12 Shi Mingheng1 He Jiapeng2
1 School of Energy and Environment, Southeast University,Nanjing 210096, China
2 College of Urban Construction and Safety and Environmental Engineering, Nanjing University of Technology, Nanjing 210009, China
关键词:
双层区域模型 室内压力 刚性 羽流模型 房间平面面积 机械排烟量
Keywords:
two layer zone model indoor pressure stiff plume model floor area mechanical exhaust smoke rate
分类号:
TK121
DOI:
10.3969/j.issn.1001-0505.2008.03.017
摘要:
室内火灾双层区域模拟中需考虑到压力的变化,利用热力学第一定律推导了室内气体参数随时间变化的常微分控制方程组.该方程组刚性,可采用吉尔算法求解.在选用Heskestad羽流公式的基础上,计算了某单室火灾在房间平面面积与机械排烟量分别为49 m2,0.3 m3/s; 49 m2,0.4 m3/s; 100 m2,0.3 m3/s; 100 m2,0.4 m3/s四种工况下室内与室外压差、烟层高度、上层烟气温度、下层空气温度随时间的变化规律.结果显示:室外压差随时间变化迅速; Heskestad与Mcaffrey羽流模型在算例中具有较好相似性; 烟层的下降与上层烟气温度的升高较多地受到房间平面面积的影响,而受顶部排烟量的影响较少.
Abstract:
In indoor fire’s two-layer zonal modeling, the variation of indoor pressure should be considered. The first law of thermodynamics is utilized to derive a set of ordinary differential controlling equations in which indoor gas parameters changes with time. These equations are stiff, but a Gear algorithm can be adapted to it. Based on the selected Heskestad plume model, the time-dependent variation regularity of pressure differences between indoor and outdoor, smoke heights, upper layer smoke temperatures, and lower layer air temperatures have been calculated for a single fire room with floor areas and mechanical exhaust smoke rates of 49 m2,0.3 m3/s; 49 m2,0.4 m3/s; 100 m2,0.3 m3/s; 100 m2,0.4 m3/s respectively. Results show that pressure difference changes with time quickly; Heskestad and Mcaffrey plume models have a better similarity; Decreasing of smoke height and increasing of upper layer smoke temperatures are influenced more by floor areas than by top exhaust smoke rates.

参考文献/References:

[1] 孟岚,周允基.Two-layer双层区域模型对单室火灾的模拟[J].哈尔滨工程大学学报,2002,23(4):56-61.
  Meng Lan,Chow Wan-Ki.Numerical simulation of fire in a single room by using a two-layer zone model[J].Journal of Harbin Engineering University,2002,23(4):56-61.(in Chinese)
[2] 高宇飞,程远平,刘静.火灾区域模型中压力方程的求解[J].消防科学与技术,2005,24(5):550-553.
  Gao Yufei,Cheng Yuanping,Liu Jing.Calculating of pressure equations in fire zonemodeling[J]. Fire Science and Technology,2005,24(5):550-553.(in Chinese)
[3] 周云斐,易亮.室内火灾内外压差分布的区域模型分析[J].火灾科学,2006,7(4):87-91.
  Zhou Yunfei,Yi Liang.Zonemodel analysis about distribution of indoor and outdoor pressure difference in an indoor firing [J]. Fire Science,2006,7(4):87-91.(in Chinese)
[4] 傅祝满.建筑火灾区域模拟的计算与实验研究[D].合肥:中国科学技术大学热能系,1995.
[5] Karlsson Björn,Quintiere James G. Enclosure fire dynamics[M].USA:CRC Press LLC,2000:75-84,271.
[6] Zukoski E E,Kubota T,Cetegen B.Entrainment in fire plumes[J]. Fire Safety Journal,1980,3(3):107-121.
[7] Heskestad G.Fire plumes,SFPE handbook of fire protection engineering[R].Quincy:National Fire Protection Association,1995.
[8] McCaffery B J.Momentum implications for buoyant diffusion flames[J].Combustion and Flame,1983,52(2):149-167.
[9] Thomas P H,Hinkley P L,Theobald C R,et al.Investigations into the flow of hot gases in roof venting,fire research tech [R].London:HMSO,1963.
[10] 游宇航,李元洲,王浩波,等.机械排烟控制小室火灾烟气的实验研究[J].燃烧科学与技术,2007,13(3):259-264.
  You Yuhang,Li Yuanzhou,Wang Haobo,et al.Experimental study on cabin fire smoke controlling with mechanical smoke exhaust[J].Journal of Combustion Science and Technology,2007,13(3):259-264.(in Chinese)
[11] 孙志忠.数值分析[M].2版.南京:东南大学出版社,2002:274-275.
[12] 徐士良.常用算法程序集(C语言描述)[M].3版.北京:清华大学出版社,2004:327-330.
[13] Walter W Jones.CFAST,an engineering tool for estimating fire and smoke transport[R].US:Department of Commerce,2000.

备注/Memo

备注/Memo:
作者简介: 童艳(1973—),女,博士生; 施明恒(联系人),男,教授,博士生导师,mhshi@seu.edu.cn.
引文格式: 童艳,施明恒,何嘉鹏.单室火灾烟气运动的双层区域模拟[J].东南大学学报:自然科学版,2008,38(3):449-453.
更新日期/Last Update: 2008-05-20