[1]周洋,陈飞,卜蓉伟,等.中空结构可燃物竖直向上火蔓延特性实验研究*[J].中国安全生产科学技术,2021,17(8):5-10.[doi:10.11731/j.issn.1673-193x.2021.08.001]
ZHOU Yang,CHEN Fei,BU Rongwei,et al.Experimental study on vertical upward flame spread characteristics of combustible with hollow structure[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(8):5-10.[doi:10.11731/j.issn.1673-193x.2021.08.001]
点击复制
中空结构可燃物竖直向上火蔓延特性实验研究*
ZHOU Yang,CHEN Fei,BU Rongwei,et al.Experimental study on vertical upward flame spread characteristics of combustible with hollow structure[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(8):5-10.[doi:10.11731/j.issn.1673-193x.2021.08.001]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 17
- 期数:
- 2021年8期
- 页码:
- 5-10
- 栏目:
- 学术论著
- 出版日期:
- 2021-08-31
文章信息/Info
- Title:
- Experimental study on vertical upward flame spread characteristics of combustible with hollow structure
- 文章编号:
- 1673-193X(2021)-08-0005-06
- Keywords:
- combustible with hollow structure; vertical upward flame spread; flame height; flame spread velocity; mass loss rate
- 分类号:
- X932
- 文献标志码:
- A
- 摘要:
- 为探究中空结构固体可燃物竖直向上火蔓延的特征规律，针对不同试样内径(d)的瓦楞纸圆管进行竖直向上的火蔓延实验研究，探讨试样内径对其竖直向上火蔓延特性的影响。结果表明：其火蔓延过程可以分为火焰发展、稳定蔓延和火焰衰弱3个阶段，蔓延过程中对流换热占据主导地位；平均火焰高度随d的增大先增大后略微减小，在d=70 mm时达到最大；火蔓延速率和质量损失速率均随d的增大而增大，并且质量损失速率与d存在较好的线性关系；火蔓延速率与热释放速率呈现出较好的幂次关系。可以发现在一定范围内，中空结构可燃物的内径越大其火灾危险性越高。
- Abstract:
- In order to explore the characteristic laws of vertical upward flame spread of solid combustibles with hollow structures,a series of vertical upward flame spread tests were conducted aiming at the corrugated paper circular pipes with different inner diameters of specimen (d),and the influence of inner diameter of specimen on the characteristics of vertical upward flame spread was discussed.The results showed that the flame spread process could be divided into three stages: flame development,steady spread and flame decay,and the convective heat transfer played a dominant role in the flame spread process.The average flame height increased first and then decreased slightly with the increase of d,and reached the maximum when d=70 mm.Both the flame spread velocity and mass loss rate increased with the increase of d,and there was a good linear relationship between mass loss rate and d.There was a good power relationship between flame spread velocity and heat release rate.It could be found that within a certain range,the larger the inner diameter of combustible with hollow structure,the higher the fire risk.
参考文献/References:
［1］GOLLNER M J,HUANG X,COBIAN J,et al.Experimental study of upward flame spread of an inclined fuel surface ［J］.Proceedings of the Combustion Institute,2013,34(2):2531-2538.
［2］GAO Y J,ZHU G Q,ZHU H,et al.Experimental study of the non-monotonous moisture effect on upward flame spread over cotton fabric ［J］.Textile Research Journal,2018,88(20):2379-2394.
［3］YU M M,ZHU G Q,MENG Q X.Experimental study and analysis of XPS vertical countercurrent fire spread ［J］.Procedia Engineering,2018,211:945-953.
［4］ZHAO K,ZHOU X,YANG L,et al.Width effects on downward flame spread over poly (methyl methacrylate) sheets ［J］.Journal of Fire Sciences,2015,33(1):69-84.
［5］JIANG L,HE J J,SUN J H.Sample width and thickness effects on upward flame spread over PMMA surface ［J］.Journal of Hazardous Material,2018,342:114-120.
［6］TASI K C.Width effect on upward flame spread ［J］.Fire Safety Journal,2009,44(7):962-967.
［7］THOMAS P H,WEBSTER C T,RAFTERY M M.Some experiments on buoyant diffusion flames ［J］.Combustion & Flame,1961,5(61):359-367.
［8］ZHOU J J,ZHU G Q,GAO Y J,et al.Experimental study on the effects of width and self-extinguishing on the upward flame spread for linen fabric ［J］.Case Studies in Thermal Engineering,2019,14:100500.
［9］KOSDON F J,WILLIAM F A,BUMAN C.Combustion of vertical cellulosic cylinders in air ［J］.Symposium (International) on Combustion,1969,12(1):253-264.
［10］KIM J S,DE RIS J,WILLIAM K F.Laminar free-convective burning of fuel surfaces ［J］.Symposium (International) on Combustion,1971,13(1):949-961.
［11］MENG Q X,ZHU G Q,YU M M.The effect of thickness on plywood vertical fire spread ［J］.Procedia Engineering,2018,211:555-564.
［12］BLASI C D,CRESCITELLI S,RUSSO G,et al.Model of the flow assisted spread of flames over a thin charring combustible ［J］.Symposium on Combustion,1989,22(1):1205-1212.
［13］张威,张英,李常委,等.基于PIV的不同受限形式下火羽流流场特性研究［J］.中国安全科学学报,2020,30(6):135-141.
ZHANG Wei,ZHANG Ying,LI Changwei,et al.Flow field characteristics of fire plume in different restricted forms based on PIV［J］.China Safety Science Journal,2020,30(6):135-141.
［14］赵平,季经纬,武爽.基于实验和数值模拟的画布类材料竖向火焰蔓延研究［J］.中国安全生产科学技术,2011,7(11):30-34.
ZHAO Ping,JI Jingwei,WU Shuang.Vertical flame spread of canvas materials based on experiment and numerical simulation［J］.Journal of Safety Science and Technology,2011,7(11):30-34.
［15］陈庆,魏旭,陈光,等.受限空间射流火形成和发展影响因素研究 ［J］.中国安全科学学报,2020,30(7):35-40.
CHEN Qing,WEI Xu,CHEN Guang,et al.Study on influence factors of formation and development of jet fire in confined space ［J］.China Safety Science Journal,2020,30(7):35-40.
相似文献/References:
备注/Memo
- 备注/Memo:
-
收稿日期： 2021-06-23；网络首发日期： 2021-08-26
* 基金项目： 国家自然科学基金青年基金项目（51804338）；湖南省自然科学基金项目（2021JJ4860）
作者简介： 周洋，博士，副教授，主要研究方向为固体可燃物热解与火蔓延机理。
