隧道火灾中正庚烷池火的火焰振荡特性研究

钟委; 骆轲轲; 王涛; 梁天水; 赵军

doi:10.6052/j.issn.1000-4750.2017.05.0377

隧道火灾中正庚烷池火的火焰振荡特性研究

钟委^1,2,
骆轲轲¹,
王涛¹,
梁天水^1,,
赵军¹

1.
郑州大学力学与工程科学学院, 河南, 郑州 450001;
2.
建筑安全与环境国家重点实验室, 北京 100013

基金项目: 国家自然科学基金项目（51404215）；建筑安全与环境国家重点实验室开放课题项目（BSBE2015-02）

详细信息

作者简介:
钟委(1978-),男,重庆人,副教授,博士,主要从事隧道及地下建筑火灾研究(E-mail:Zhongwei@zzu.edu.cn);骆轲轲(1992-),男,河南人,硕士生,主要从事隧道火灾研究(E-mail:luojiake1992@163.com);王涛(1990-),男,河南人,硕士生,主要从事隧道火灾研究(E-mail:1085368862@qq.com);赵军(1971-),男,河南人,教授,博士,主要从事纤维增强混凝土结构研究(E-mail:zhaoj@zzu.edu.cn).

通讯作者:
梁天水(1981-),男,河南人,副教授,博士,主要从事细水雾灭火研究(E-mail:liangtsh@zzu.edu.cn).

中图分类号: U458.1
计量
- 文章访问数: 406
- HTML全文浏览量: 49
- PDF下载量: 33
出版历程
- 收稿日期: 2017-05-17
- 修回日期: 2017-10-23
- 刊出日期: 2018-09-28

STUDY ON THE OSCILLATION CHARACTERISTICS OF N-HEPTANE POOL FIRE IN TUNNELS

1.
School of Mechanics & Engineering Science, Zhengzhou University, Zhengzhou, Henan 450001, China;
2.
State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China

摘要

摘要: 在小尺寸隧道实验台开展一系列实验，对正庚烷池火火焰振荡特性进行研究。通过Matlab图像处理工具箱提取火焰振荡频率，分析不同隧道宽度下无量纲火焰振荡频率St和弗劳德数Fr之间的关系。结果表明在隧道火灾中，正庚烷池火的燃烧过程可以分为初始燃烧阶段、过渡阶段和稳定燃烧阶段。在初始阶段和稳定阶段中火焰振荡频率不变，过渡阶段可进一步分为间歇性顶棚射流火焰和连续性顶棚射流火焰阶段，其无量纲火焰振荡频率St均和Fr^-0.5成正比。隧道宽度对正庚烷池火振荡特性也有影响，在间歇性顶棚射流火焰阶段，隧道宽度减小能够增大质量燃烧速率，从而增大比例系数；在连续性顶棚射流火焰阶段，由于反浮力壁面射流的卷吸作用，隧道宽度减小反而导致比例系数减小。
- 隧道火灾 /
- 火焰振荡频率 /
- 弗劳德数 /
- 顶棚射流 /
- 隧道宽度
Abstract: A series of tests were conducted in a small scale tunnel to study the n-heptane pool fire oscillation characteristics. The flame oscillation frequency was extracted through the Matlab image processing tool. The relations between the dimensionless oscillation frequency St and Fr were analyzed under the varying tunnel width in this study. Results showed that the burning process of n-heptane pool fire can be divided into the initial burning stage, transition stage and the stable burning stage in the tunnel. In the initial and stable burning stages, the flame oscillation frequency was constant. The transition stage can be further divided into the intermittent ceiling jet flame stage and the continuous ceiling jet flame stage, and the dimensionless oscillation frequency St was proportional to Fr^-0.5. The tunnel width also had an influence on the n-heptane pool fire oscillation characteristics. In the intermittent ceiling jet flame stage, reducing the tunnel width will increase the mass burning rate, and the proportion coefficient will increase. In the continuous ceiling jet flame stage, reducing the tunnel width will lead to a decrease in the proportion coefficient due to the anti-buoyancy effect of the wall jet.
- tunnel fire /
- flame oscillation frequency /
- Froude number /
- ceiling jet /
- tunnel width

HTML全文

参考文献(22)

[1]	钟委, 王涛, 梁天水. 隧道火灾中正庚烷池火燃烧特性的实验研究[J]. 工程力学, 2017, 8(8):241-248. Zhong Wei, Wang Tao, Liang Tianshui. Experimental investigation on the burning characteristic of n-heptanes pool fire in tunnel[J]. Engineering Mechanics, 2017, 8(8):241-248. (in Chinese)
[2]	纪杰, 霍然, 胡隆华, 等. 长通道内排烟口与火源相对位置对机械排烟效果的影响[J]. 工程力学, 2009, 26(5):234-238. Ji Jie, Huo Ran, Hu Longhua, et al. Influence of relative location of smoke exhaust opening to fire source on mechanical smoke exhaust efficiency in a long channel[J]. Engineering Mechanics, 2009, 26(5):234-238. (in Chinese)
[3]	李兆周. 烟囱效应作用下隧道火灾发展特性研究[D]. 郑州:郑州大学, 2015. Li Zhaozhou. Studies on the development of tunnel fire under the function of stack effect[D]. Zhengzhou:Zhengzhou University, 2015. (in Chinese)
[4]	Li Y Z, Ingason H. The maximum ceiling gas temperature in a large tunnel fire[J]. Fire Safety Journal, 2012, 48:38-48.
[5]	Cetegen B M, Ahmed T A. Experiments on the periodic instability of buoyant plumes and pool fires[J]. Combustion and Flame, 1993, 93(1):157-184.
[6]	Yilmaz N, Donaldson A B, Lucero R E. Experimental study of diffusion flame oscillations and empirical correlations[J]. Energy Conversion and Management, 2008, 49(11):3287-3291.
[7]	Bejan A. Predicting the pool fire vortex shedding frequency[J]. Journal of heat transfer, 1991, 113(1):261-263.
[8]	荣建忠, 姚卫, 高伟, 等. 基于多特征融合技术的火焰视频探测方法[J]. 燃烧科学与技术, 2013, 19(3):227-233. Rong Jianzhong, Yao Wei, Gao Wei, et al. Fire video detection method based on multi-features fusion[J]. Journal of Combustion Science and Technology, 2013, 19(3):227-233. (in Chinese)
[9]	吴迎春, 吴学成, 陆守香, 等. 顶棚开口受限空间油池火火焰振荡模式研究[J]. 燃烧科学与技术, 2011, 10(5):425-431. Wu Yingchun, Wu Xuecheng, Lu Shouxiang, et al. Flame pulsation modes of pool fire in confined compartment with single ceiling opening[J]. Journal of Combustion Science and Technology, 2011, 10(5):425-431. (in Chinese)
[10]	Takahashi N, Suzuki M, Dobashi R, et al. Behavior of luminous zones appearing on plumes of large-scale pool fires of kerosene[J]. Fire Safety Journal, 1999, 33(1):1-10.
[11]	黎昌海, 吴迎春, 陆守香, 等. 封闭空间油池火火焰振荡特性研究[J]. 中国科学技术大学学报, 2010, 40(4):380-386. Li Changhai, Wu Yingchun, Lu Shouxiang, et al. Study on flame pulsation of pool fires in closed compartments[J]. Journal of University of Science and Technology of china, 2010, 40(4):380-386. (in Chinese)
[12]	Lönnermark A, Neumann N T. Pulsations during fires in tunnels[J]. Fire Technology, 2013, 49(15):551-581.
[13]	Fang J, Jiang C, Wang J W, et al. Oscillation frequency of buoyant diffusion flame in cross-wind[J]. Fuel, 2016, 184(4):856-863.
[14]	Lönnermark A, Persson B, Ingason H. Pulsations during large-scale fire tests in the Runehamar tunnel[J]. Fire Safety Journal, 2006, 41(5):377-389.
[15]	James G Quintiere. Fire plumes:Fundamentals of fire phenomena[M]. England:John Wiley, 2006:297-334.
[16]	Malalasekera W M G, Versteeg H K, Gilchrist K. A review of research and an experimental study on the pulsation of buoyant diffusion flames and pool fires[J]. Fire & Materials, 1996, 20(6):261-271.
[17]	Quintiere J G. Scaling applications in fire research[J]. Fire Safety Journal, 1989, 15(1):1-12.
[18]	范传刚. 隧道火灾发展特性及竖井自然排烟方法研究[D]. 合肥:中国科学技术大学, 2015. Fan Chuangang. Studies on characteristics of tunnel fire development and natural ventilation mode using shafts[D]. Hefei:University of Science and Technology of China, 2015. (in Chinese)
[19]	Smoke management in covered malls and atria. SFPE Hand-book of fire protection engineering[S]. National Fire Protection Association, 1995:292-310.
[20]	陈志斌, 胡隆华, 霍然, 等. 基于图像相关性提取的火焰振荡频率[J]. 燃烧科学与技术, 2008, 14(4):367-371. Chen Zhibin, Hu Longhua, Huo Ran, et al. Flame oscillation frequency based on image correlation[J]. Journal of Combustion Science and Technology, 2008, 14(4):367-371. (in Chinese)
[21]	Li L, Li S, Wang X, et al. Fire-induced flow temperature along tunnels with longitudinal ventilation[J]. Tunnelling and Underground Space Technology, 2012, 32(5):44-51.
[22]	Pagni P J. Pool vortex shedding frequencies[J]. Applied Mechanics Review, 1990, 43(1):153-170.