Research on axial temperature distribution of annular pool fires of floating roof tanks

doi:10.16265/j.cnki.issn1003-3033.2019.08.010

Abstract

Abstract: In order to improve fire emergency response ability of large floating roof tanks, three annular pool fire tests are conducted by using ethanol. Firstly, the mass loss rate, axial temperature and flame distribution of pool fires were measured. Then a comparison was made between the measured temperature and the calculation from traditional plume models. Finally, the calculation model of plume axis temperature was modified. The results show that the burning rate of annular pool fire increases by 8.1% and 48.4% compared with that in circular pool fire(0.62 g/s) as it comes to fusion combustion stage; the axial flame temperature increases first and then decreases, resulting in a maximum temperature between 20%-60% of flame height, and the calculated values obtained from the modified model are more consistent with the measured temperature; the thermal steam flow generated by the fusion flame in infrared camera will increase the hazards of thermal diffusion to external conditions.

Key words: annular pool fire, flame fusion, burning rate, axial temperature, modified model

CLC Number:

X932

ZHANG Yixiang, LI Yuxing, ZHU Jianlu, YANG Yufeng. Research on axial temperature distribution of annular pool fires of floating roof tanks[J]. China Safety Science Journal, 2019, 29(8): 61-66.

References

[1] 郎需庆,谈龙妹,吴京峰,等.压缩空气泡沫灭火系统扑救浮顶储罐密封圈火灾的应用研究[J].工业安全与环保,2016,42(3): 33-35.
LANG Xuqing, TAN Longmei, WU Jingfeng, et al. Application study of compressed air foam system on extinguishment of floating roof tank rim seal fires[J]. Industrial Safety and Environmental Protection, 2016, 42(3): 33-35.
[2] 陈福真, 张明广, 王妍, 等. 罐区池火灾多米诺效应试验研究[J]. 中国安全科学学报, 2017, 27(11): 31-36.
CHEN Fuzhen, ZHANG Mingguang, WANG Yan, et al. Experimental study on Domino effect in pool fire in tank farm[J]. China Safety Science Journal, 2017, 27(11): 31-36.
[3] 任常兴, 安慧娟. 油储罐火灾事故回顾及对策[J]. 现代职业安全, 2015 (6): 17-21.
[4] PERSSON H, LNNERMARK A. Tank fires-review of fire incidents 1951-2003[M]. Stockholm: Swedish National Testing and Research Instiute, 2004: 15-16.
[5] MCCAFFREY B J. Purely buoyant diffusion flames: some experimental results[M]. Washington DC: National Bureau of Standards, 1979: 18-19.
[6] ZUKOSKI E E, KUBOTA T, CETEGEN B. Entrainment in fire plumes[J]. Fire Safety Journal, 1981, 3(3): 107-121.
[7] HESKESTAD G. Engineering relations for fire plumes[J]. Fire Safety Journal, 1984, 7(1): 25-32.
[8] 陈志斌,胡隆华,霍然,等.矩形油池火羽流中心线的温度分布[J].燃烧科学与技术, 2009, 15(3): 249-253.
CHEN Zhibin, HU Longhua, HUO Ran, et al. Plume centerline temperature distribution of rectangular poolfires[J].Fire Science and Technology, 2009, 15(3): 249-253.
[9] 袁步平, 邱榕, 杨超琼. 高原火羽流温升特性与模型对比研究[J]. 安全与环境学报, 2011, 11(6): 164-169.
YUAN Buping. QIU Rong, YANG Chaoqiong. Numerical simulation on Axi-symmetric fire plume temperature-rising in plateau areas and compared with plume models[J]. Journal of Safety and Environment, 2011, 11(6): 164-169.
[10] 蒋新生, 徐建楠, 冯军, 等. 航空煤油小尺度池火燃烧规律及火焰结构研究[J]. 中国安全科学学报, 2016, 26(1): 64-68.
JIANG Xinsheng, XU Jiannan, FENG Jun, et al. Research on combustion law and flame structure of small scale aviation kerosene pool fire[J]. China Safety Science Journal, 2016, 26(1): 64-68.
[11] 沈燕, 陶常法, 宗若雯, 等. 矩形喷口射流火火焰轴向温度研究[J]. 火灾科学, 2017, 26(2): 87-92.
SHEN Yan, TAO Changfa, ZONG Ruowen, et al. Axial temperature distribution of vertical jet flame from rectangle nozzles[J]. Fire Safety Science, 2017, 26(2): 87-92.
[12] 杜二峰, 舒赣平, 张欣欣, 等. 局部火灾羽流中心线温度计算模型及试验研究简[J]. 防灾减灾工程学报, 2016, 32(3): 337-342,349.
DU Erfeng, SHU Ganping, ZHANG Xinxin, et al. Calculating method for fire plume centerline temperature[J]. Journal of Disaster Prevention and Mitigation Engineering, 2016, 32(3): 337-342, 349.
[13] MA T G, QUINTIERE J G. Numerical simulation of axi-symmetric fire plumes: accuracy and limitations[J]. Fire Safety Journal, 2003, 38(5): 467-492.
[14] HAMINS A P, YANG J C, KASHIWAGI T. Global model for predicting the burning rates of liquid pool fires (NISTIR 6381)[R].Builing and Fire Research Laboratory, 1999.
[15] 王喜世, 伍小平, 秦俊, 等. 用红外热成像方法测量火焰温度的实验研究[J]. 激光与红外, 2001, 31(3): 169-172.
WANG Xishi, WU Xiaoping, QIN Jun, et al. Experimental study on flame temperature measurement by infrared thermography[J]. Laser & Infrared, 2001, 31(3): 169-172.