基于PIV的不同受限形式下火羽流流场特性研究

doi:10.16265/j.cnki.issn1003-3033.2020.06.020

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (6): 135-141.doi: 10.16265/j.cnki.issn1003-3033.2020.06.020

基于PIV的不同受限形式下火羽流流场特性研究

张威, 张英副教授, 李常委, 苑大超

武汉理工大学安全科学与应急管理学院,湖北武汉 430070

收稿日期:2020-03-18 修回日期:2020-05-19 出版日期:2020-06-28 发布日期:2021-01-28
作者简介:张威(1996—),男,安徽安庆人,硕士研究生,研究方向为受限条件火羽流和火蔓延。E-mail:280797@whut.edu.cn。
基金资助:
国家自然科学基金资助(51706164)。

Flow field characteristics of fire plume in different restricted forms based on PIV

ZHANG Wei, ZHANG Ying, LI Changwei, YUAN Dachao

School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan Hubei 430070, China

Received:2020-03-18 Revised:2020-05-19 Online:2020-06-28 Published:2021-01-28

摘要/Abstract

摘要： 为探究不同受限形式对火羽流流场的影响,采用精细热电偶技术和粒子图像测速(PIV)技术,监测扩散燃烧器在自由空间、侧壁空间和墙角空间下火羽流高度、温度和流场等,了解不同受限形式下火羽流流场特性。结果表明:当无量纲火源功率Q^*小于1.5时,无量纲火焰高度L_f/D随之线性增加;当Q^*超过1.5时,L_f/D增加幅度减小;在不同受限空间内的横向速度分布均服从近似高斯分布,且侧壁空间和墙角空间会使火焰中心产生一定偏离; Q^*为1.982时,涡旋直径为3.5～8 cm, 涡度大小随侧壁面的增加逐渐增大,这是因为侧壁存在时涡旋会发生脱落,这种脱落导致短时间内释放大量热量,对火羽流存在拉伸作用从而促进燃烧,并进一步产生更大的涡旋。

关键词: 粒子图像测速(PIV), 受限形式, 火羽流流场, 温度场, 涡旋

Abstract: In order to explore effects of different restricted forms on flow field of fire plume, fine thermocouple and PIV technologies were used to monitor fire plume's height, temperature and flow field of diffusion burner in free space, side wall space and corner space, and then flow field characteristics in different restricted forms were studied. The experimental results show that when dimensionless source power Q^* is less than 1.5, dimensionless flame height L_f/D increases linearly which will become steady approximately when Q^* exceeds 1.5. Lateral velocity in different restricted spaces all conform to approximate Gaussian distributions, and sidewall space and corner space cause a certain deviation of flame center. Vortex diameter is between 3.5 and 8 cm at Q^* is 1.982, and its size gradually increase along with increase of side wall surface because vortex will fall off, which will release a lot of heat in a short time and exerts a stretching impact on fire plume. As a result, combustion reaction of fire is promoted, and then a larger vortex is generated.

Key words: particle image velocimetry (PIV), resticted forms, flow field of fire plume, temperature field, vortex

中图分类号:

X932

张威, 张英, 李常委, 苑大超. 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, YUAN Dachao. Flow field characteristics of fire plume in different restricted forms based on PIV[J]. China Safety Science Journal, 2020, 30(6): 135-141.

参考文献

[1] 戚宜欣,杜红兵,周心权,等.运动受限空间内火灾研究的现状与展望[J].中国安全科学学报,2000,10(4):9-13,81.
QI Yixin, DU Hongbing, ZHOU Xinquan, et al. Current situation and prospect of fire research in confined space [J]. China Safety Science Journal, 2000,10 (4): 9-13,81.
[2] DRYSDALE D D, MACMILLAN A J R, SHILITTO D. The King's cross fire: experimental verification of the 'trench effect'[J]. Fire Safety Journal, 1992, 18(1): 75-82.
[3] SIMCOX S. Fire at King's cross underground station, 18th November 1987: numerical simulation of the buoyant flow and heat transfer[R]. Harwell Report, 1988.
[4] ZHANG Ying, JI Jie, WANG Qingsong, et al. Prediction of the critical condition for flame acceleration over wood surface with different sample orientations[J]. Combustion and Flame, 2012, 159(9): 2 999-3 002.
[5] ZHANG Ying, SUN Jinhua, HUANG Xinjie, et al. Heat transfer mechanisms in horizontal flame spread over wood and extruded polystyrene surfaces[J]. International Journal of Heat and Mass Transfer, 2013, 61: 28-34.
[6] ZHANG Ying, JI Jie, LI Jie, et al. Effects of altitude and sample width on the characteristics of horizontal flame spread over wood sheets[J]. Fire Safety Journal, 2012, 51: 120-125.
[7] ZHOU M, GARNER C P. Flame propagation and laminar burning velocity measurements in a cylindrical combustion chamber using particle image velocimetry[C].Sae International Fall Fuels & Lubricants Meeting & Exhibition, 1995.
[8] GRELLA J J, FAETH G M. Measurements in a two-dimensional thermal plume along a vertical adiabatic wall[J]. Journal of Fluid Mechanics, 1975, 71(4): 701-710.
[9] LONG E J, HARGRAVE G K, JARVIS S, et al. Characterisation of the interaction between toroidal vortex structures and flame front propagation[J]. Journal of Physics: Conference Series, 2006, 45: 104-111.
[10] HASEMI Y, TOKUNAGA T. Some experimental aspects of turbulent diffusion flames and buoyant plumes from fire sources against a wall and in a corner of walls[J]. Combustion Science and Technology, 1984, 40(1/2/3/4): 1-18.
[11] 刘玥, 梁忠生, 鲍锋. 粒子成像测速: 非介入式全场技术[J]. 中国科技信息, 2010(13):39-40,33.
LIU Yue, LIANG Zhongsheng, BAO Feng. Particle imaging velocity measurement: non-interventional full-court technique [J]. China Science and Technology Information, 2010(13):39-42,33.
[12] SEOL D G, BHAUMIK T, BERGMANN C, et al. Particle image velocimetry measurements of the mean flow characteristics in a bubble plume[J]. Journal of Engineering Mechanics, 2007, 133(6): 665-676.
[13] WANG Xin, DU Guangyao, ZHANG Yujie, et al. Experimental research on PIV test of single thermal plume velocity distribution with different heating power[J]. Procedia Engineering, 2017, 205: 2 493-2 500.
[14] MORTON B R. Modeling fire plumes[J]. Symposium (International) on Combustion, 1965, 10(1): 973-982.
[15] STEWARD, F R. Prediction of the height of turbulent diffusion buoyant flames[J]. Combustion Science and Technology, 1970, 2(4): 203-212.
[16] ZUKOSKI E E, KUBOTA T, CETEGEN B. Entrainment in fire plumes[J]. Fire Safety Journal, 1981, 3(3): 107-121.
[17] HESKESTAD G. Engineering relations for fire plumes[J]. Fire Safety Journal, 1984, 7(1): 25-32.
[18] 张英,孙金华,纪杰,等.高原环境下木材表面火蔓延特性的实验研究[J].燃烧科学与技术,2011,17(3): 274-279.
ZHANG Ying, SUN Jinhua, JI Jie,et al. Experimental study on wood surface fire propagation characteristics in plateau environment [J]. Combustion Science and Technology,2011,17(3): 274-279.
[19] 张英. 典型可炭化固体材料表面火蔓延特性研究[D]. 合肥:中国科学技术大学, 2012.
ZHANG Ying. Study on flame spread characteristics of typical carbonizable solid materials surface[D]. Hefei:University of Science and Technology of China, 2012.
[20] THOMAS P H, WEBSTER C T, RAFTERY M M. Some experiments on buoyant diffusion flames[J]. Combustion & Flame, 1961, 5: 359-367.
[21] 张人杰, 袁理明. 侧壁对受限空间烟羽流准稳态结构的影响[J]. 中国科学技术大学学报, 1995,25(4): 506-511.
ZHANG Renjie, YUAN Liming. Effects of lateral walls on quasi-steady structure of plume in confined space [J]. Journal of University of Science and Technology of China, 1995,25(4): 506-511.
[22] LOZANO J, TACHAJAPONG W, WEISE D R, et al. Fluid dynamic structures in a fire environment observed in laboratory-scale experiments[J]. Combustion Science and Technology, 2010, 182(7): 858-878.

基于PIV的不同受限形式下火羽流流场特性研究

Flow field characteristics of fire plume in different restricted forms based on PIV

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	荆德吉, 贾鑫, 张天, 孟祥曦, 马明星, 王志恒. 落煤过程中涡旋吹吸式除尘技术数值模拟及试验[J]. 中国安全科学学报, 2021, 31(6): 121-127.
[2]	马恒, 陈晓军, 荆德吉. H型通风巷道瓦斯爆炸及泄爆过程模拟研究[J]. 中国安全科学学报, 2021, 31(1): 45-51.
[3]	柳承徽, 陈先锋, 张威, 徐乐先, 赵齐, 黄楚原. 基于PIV的气动式细水雾流场研究[J]. 中国安全科学学报, 2020, 30(7): 120-126.
[4]	张英, 宋舆涵, 蒋帅, 李云涛, 申世飞, 陈月. 突扩管道中H₂/Air预混火焰传播特性的数值模拟[J]. 中国安全科学学报, 2019, 29(7): 33-38.
[5]	陈景序, 荆德吉, 葛少成. 气动涡旋雾幕性能影响因素试验及优化研究[J]. 中国安全科学学报, 2019, 29(7): 123-128.
[6]	笪良军, 谢启源, 罗圣峰. 倾斜XPS板材向外多向耦合蔓延燃烧特性研究[J]. 中国安全科学学报, 2019, 29(11): 64-70.
[7]	张小良, 叶圣军, 刘晓晨, 李浩, 杨璐颖. 水平管道弱激波扬起沉积粉尘运动特征研究[J]. 中国安全科学学报, 2019, 29(1): 55-61.
[8]	陈曦讲师, 葛少成教授, 张兴华, 张忠温, 葛斐. 选煤厂暗道多热源叠加作用对通风排尘特性的影响[J]. 中国安全科学学报, 2017, 27(11): 150-156.
[9]	徐子杰，齐庆新，李宏艳，赵善坤，张宁博，苏荣华. 冲击倾向性煤体加载破坏的红外辐射特征研究[J]. 中国安全科学学报, 2013, 23(10): 121-.
[10]	黄新杰，丁厚成，张浩，张英，孙金华. 海拔对聚苯乙烯火蔓延温度场特性影响的研究[J]. 中国安全科学学报, 2012, 22(10): 36-.
[11]	冯涛，王鹏飞，郝小礼，陈丽娟，马平原. 煤矿乏风低浓度甲烷热逆流氧化试验研究[J]. 中国安全科学学报, 2012, 22(10): 88-.
[12]	张嘉琪，刘阳，王晓丽，郑嗣华，赵晖. 虚拟仪器技术在神经网络火灾识别模型中的应用研究[J]. 中国安全科学学报, 2011, 21(11): 49-.
[13]	徐志胜，李冬，姜学鹏，赵红莉，李洪. 纵向通风隧道内火灾温度场分布规律研究[J]. 中国安全科学学报, 2010, 20(3): 51-.
[14]	苏石川，王亮，聂宇宏，顾祥. 基于不同风速下火旋风的数值计算及特性分析[J]. 中国安全科学学报, 2009, 19(9): 78-.
[15]	徐志胜，万俊，王薇. 火灾下盾构隧道管片衬砌热力耦合数值分析[J]. 中国安全科学学报, 2009, 19(10): 46-.