# [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： var jiathis_config = { data_track_clickback: true };

38

2008年第3期

449-453

2008-05-20

## 文章信息/Info

Title:
Two-layer zonal modeling of smoke movement in single fire room

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):
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

Keywords:

TK121
DOI:
10.3969/j.issn.1001-0505.2008.03.017

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.

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