Numerical simulation analysis of vertical jet fire impinging on the pipeline

doi:10.11949/0438-1157.20220698

Abstract

Abstract:

For the vertical upward barrier jet fire, the predecessors mostly studied the ceiling jet, but there were very few studies on the vertical upward jet fire plume impinging on the pipeline. In order to study the evolution behavior characteristics of the vertical upward jet fire plume hitting the pipeline, based on the basic principles of combustion and fluid mechanics, the influence of different heat release rates, diameters of the obstacle pipelines and the distance between the pipe wall and the fire source were investigated by using the Fluent software. It is concluded that the diameter of the obstacle pipe and the distance between the pipe wall and the fire source have a certain degree of influence on the flame height and width, and a dimensionless flame height representation model based on Froude number is obtained.

Key words: jet fire, methane, obstacle pipes, flame length, flame width, numerical simulation, safety

摘要：

当前对于竖直向上屏障射流火的研究大多集中于顶棚射流，对于竖直向上射流火羽流撞击管道的研究相对较少。为研究竖直向上射流火羽流撞击管道的特征演化行为，基于燃烧学及流体力学基本原理，运用Fluent数值模拟软件，通过控制变量法对不同热释放速率、障碍管道直径及管壁-火源间距因素进行探究。研究表明障碍管道直径和管壁-火源间距对火焰高度和宽度均有一定程度的影响，且得到了基于Froude数的无量纲火焰高度表征模型。

关键词: 射流火, 甲烷, 障碍管道, 火焰长度, 火焰宽度, 数值模拟, 安全

CLC Number:

X 931

Shanshan LIAO, Shaogang ZHANG, Junjun TAO, Jiahao LIU, Jinhui WANG. Numerical simulation analysis of vertical jet fire impinging on the pipeline[J]. CIESC Journal, 2022, 73(9): 4226-4234.

廖珊珊, 张少刚, 陶骏骏, 刘家豪, 汪金辉. 竖直射流火撞击障碍管道数值模拟分析[J]. 化工学报, 2022, 73(9): 4226-4234.

Figures/Tables 14

Fig.1 Temperature distribution of the section below the obstacle pipeline under different grid numbers

Fig.2 Comparison between simulation and experimental results of jet fire flame length

Fig.3 Simulation model of jet fire

Table1 Information of simulation tests

障碍管道数量	管道-火源距离H/m	管道直径D₁/m	燃料泄漏速度u/(m/s)	热释放速率 Q/kW
0	—	—	150~400	167.2~445.8
1	0.5	0.4	150~400	167.2~445.8
1	1.0	0.4	150~400	167.2~445.8
1	1.5	0.2	150~400	167.2~445.8
1	1.5	0.4	150~400	167.2~445.8
1	1.5	0.6	150~400	167.2~445.8
1	1.5	0.8	150~400	167.2~445.8

Fig.4 Contour of temperature in different simulation tests

Fig.5 Variation of horizontal width of flame spread along the pipe under different D1 and Q

Fig.6 Temperature distribution of fire plume hitting pipes with different diameters when u=300m/s

Fig.7 Horizontal jet fire plume hiting obstacle pipe[24]

Fig.8 Relationship between the Lf/D and Q at H=1.5m

Fig.9 Temperature slice under different spacing between pipe-wall and vent of fire source

Fig.10 Relationship between flame height and heat release rate at the diameter of the obstacle pipe 0.4 m

Table 2 Some current studies on flame length of jet fire

文献	燃料类型	喷射方向	Fr	火焰长度公式
[41]	丙烷	竖直	80~1×10⁵	$L f D = 27 F r 0.2$
[42]	丙烷和乙烯	竖直	800~8×10⁴	$L f D = 25 F r 0.2$
[43]	液化石油气	竖直	150~4.5×10⁵	$L f D = 30 F r 0.2$
[44]	天然气	竖直	2.7×10³~8.2×10⁴	$L f D = 6.75 F r 0.24$

Table 2 Some current studies on flame length of jet fire

文献	燃料类型	喷射方向	Fr	火焰长度公式
[41]	丙烷	竖直	80~1×10⁵	$L f D = 27 F r 0.2$
[42]	丙烷和乙烯	竖直	800~8×10⁴	$L f D = 25 F r 0.2$
[43]	液化石油气	竖直	150~4.5×10⁵	$L f D = 30 F r 0.2$
[44]	天然气	竖直	2.7×10³~8.2×10⁴	$L f D = 6.75 F r 0.24$

Fig.11 Fitting of free jet fire data

Fig.12 Data fitting of jet fire in obstructed pipeline

References 44

1	E.I.A.US.Annual energy outlook[R].Washington D.C.:U.S. Department of Energy, 2013.
2	Chong Z R, Yang S H B, Babu P, et al. Review of natural gas hydrates as an energy resource: prospects and challenges[J]. Applied Energy, 2016, 162: 1633-1652.
3	中国青年网. 广西防城港一化工厂管道泄漏引发火灾[Z/OL]. [2022-05-14]..
	China Youth Network. Fire caused by pipeline leakage at a chemical plant in Fangchenggang, Guangxi[Z/OL]. [2022-05-14]..
4	周魁斌, 刘娇艳, 蒋军成. 高压可燃气体泄漏动力学过程与喷射火热灾害分析[J]. 化工学报, 2018, 69(4): 1276-1287.
	Zhou K B, Liu J Y, Jiang J C. Analyses on dynamical process of high pressure combustible gas leakage and thermal hazard of jet fire[J]. CIESC Journal, 2018, 69(4): 1276-1287.
5	Kim J S, Yang W, Kim Y, et al. Behavior of buoyancy and momentum controlled hydrogen jets and flames emitted into the quiescent atmosphere[J]. Journal of Loss Prevention in the Process Industries, 2009, 22(6): 943-949.
6	Ab Aziz N S, Kasmani R M, Samsudin M D M, et al. Main geometrical features of horizontal buoyant jet fire and associated radiative fraction[J]. Process Safety Progress, 2019, 39: e12124.
7	Zukoski E E, Kubota T, Cetegen B. Entrainment in fire plumes[J]. Fire Safety Journal, 1981, 3(2): 107-121.
8	Heskestad G. Luminous heights of turbulent diffusion flames[J]. Fire Safety Journal, 1983, 5(2): 103-108.
9	Heskestad G. Turbulent jet diffusion flames: consolidation of flame height data[J]. Combustion and Flame, 1999, 118(1/2): 51-60.
10	Delichatsios M A. Transition from momentum to buoyancy-controlled turbulent jet diffusion flames and flame height relationships[J]. Combustion and Flame, 1993, 92(4): 349-364.
11	Schefer R W, Houf W G, Bourne B, et al. Spatial and radiative properties of an open-flame hydrogen plume[J]. International Journal of Hydrogen Energy, 2006, 31(10): 1332-1340.
12	周魁斌, 蒋军成, 李国宝. 管道压力对天然气射流火热辐射灾害的影响[J]. 安全与环境学报, 2016, 16(5): 163-167.
	Zhou K B, Jiang J C, Li G B. Impact of the pipeline pressure on the thermal radiation hazards of the natural gas jet flame[J]. Journal of Safety and Environment, 2016, 16(5): 163-167.
13	Mashhadimoslem H, Ghaemi A, Palacios A, et al. A new method for comparison thermal radiation on large-scale hydrogen and propane jet fires based on experimental and computational studies[J]. Fuel, 2020, 282: 118864.
14	Lv J, Zhang X L, Liu S X, et al. Flame morphology of horizontal jets under sub-atmospheric pressures: experiment, dimensional analysis and an integral model[J]. Fuel, 2022, 307: 121891.
15	Rengel B, Àgueda A, Pastor E, et al. Experimental and computational analysis of vertical jet fires of methane in normal and sub-atmospheric pressures[J]. Fuel, 2020, 265: 116878.
16	尚峰举. 水平环境风作用下扩散射流火焰下洗及脱离行为研究[D]. 合肥: 中国科学技术大学, 2017.
	Shang F J. The downwash and detachment study of jet fire diffusion flame in cross-flow[D]. Hefei: University of Science and Technology of China, 2017.
17	王静舞. 横向风条件下射流扩散火焰形态与燃烧特性研究[D]. 合肥: 中国科学技术大学, 2017.
	Wang J W. Study of shapes and combustion characteristics of jet diffusion flames under crossflow[D]. Hefei: University of Science and Technology of China, 2017.
18	刘松涛,赵金龙,卫文彬,等. 隧道内不同间距双火源火灾实验及模拟研究[J].中国公路学报, 2022, 35(7): 193-202.
	Liu S T, Zhao J L, Wei W B,et al. Experiment and simulation study on double fire sources with different distances in tunnel[J]. Chinese Journal of Highways, 2022, 35(7): 193-202.
19	李博. 侧向风作用下的双火源相互作用燃烧特性研究[D]. 合肥: 中国科学技术大学, 2021.
	Li B. Interaction behaviors of two fire sources burning under cross wind[D]. Hefei: University of Science and Technology of China, 2021.
20	Iyogun C O, Birouk M. Effect of fuel nozzle geometry on the stability of a turbulent jet methane flame[J]. Combustion Science and Technology, 2008, 180(12): 2186-2209.
21	Imamura T, Hamada S, Mogi T, et al. Experimental investigation on the thermal properties of hydrogen jet flame and hot currents in the downstream region[J]. International Journal of Hydrogen Energy, 2008, 33(13): 3426-3435.
22	Roberts T, Beckett H, Buckland I. Directed water deluge protection of liquefied petroleum gas vessels[C]// Institution of Chemical Engineers Symposium Series. Institution of Chemical Engineers, 2001: 193-212.
23	Wang Z H, Zhou K B, Zhang L, et al. Flame extension area and temperature profile of horizontal jet fire impinging on a vertical plate[J]. Process Safety and Environmental Protection, 2021, 147: 547-558.
24	Zhang X C, Hu L H, Zhu W, et al. Flame extension length and temperature profile in thermal impinging flow of buoyant round jet upon a horizontal plate[J]. Applied Thermal Engineering, 2014, 73(1): 15-22.
25	Zhang X C, Tao H W, Xu W B, et al. Flame extension lengths beneath an inclined ceiling induced by rectangular-source fires[J]. Combustion and Flame, 2017, 176: 349-357.
26	Zhang X C, Tao H W, Zhang Z J, et al. Temperature profile beneath an inclined ceiling induced by plume impingement of gas fuel jet flame[J]. Fuel, 2018, 223: 408-413.
27	Wang C, Ding L, Wan H X, et al. Experimental study of flame morphology and size model of a horizontal jet flame impinging a wall[J]. Process Safety and Environmental Protection, 2021, 147: 1009-1017.
28	周梦雅, 周魁斌, 王朝, 等. 坑道限制条件下水平丙烷喷射火火焰行为研究[J]. 化工学报, 2022, 73(2): 960-971.
	Zhou M Y, Zhou K B, Wang C, et al. Flame behavior of horizontal propane jet fire in a pit[J]. CIESC Journal, 2022, 73(2): 960-971.
29	Kashi E, Bahoosh M. Jet fire assessment in complex environments using computational fluid dynamics[J]. Brazilian Journal of Chemical Engineering, 2020, 37(1): 203-212.
30	李玉星, 刘鹏, 耿晓茹, 等. 障碍物条件下的甲烷水平喷射火燃烧特性研究[J]. 油气田地面工程, 2019, 38(10): 7-13.
	Li Y X, Liu P, Geng X R, et al. Study on combustion characteristics of methane horizontal jet fire with obstacles[J]. Oil-Gasfield Surface Engineering, 2019, 38(10): 7-13.
31	吴月琼, 周魁斌, 黄梦源, 等. 储罐壁面限制条件下喷射火火焰行为[J]. 化工学报, 2021, 72(5): 2896-2904.
	Wu Y Q, Zhou K B, Huang M Y, et al. Flame behavior of jet fire confined by the tank wall[J]. CIESC Journal, 2021, 72(5): 2896-2904.
32	Foroughi V, Palacios A, Barraza C, et al. Thermal effects of a sonic jet fire impingement on a pipe[J]. Journal of Loss Prevention in the Process Industries, 2021, 71: 104449.
33	Wang Z, Zhou K, Liu M, et al. Lift-off behavior of horizontal subsonic jet flames impinging on a cylindrical surface[C]// Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Saint-Petersburg: Saint-Petersberg Polytechnic University Press, 2019: 831-841.
34	Laboureur D M, Gopalaswami N, Zhang B, et al. Experimental study on propane jet fire hazards: assessment of the main geometrical features of horizontal jet flames[J]. Journal of Loss Prevention in the Process Industries, 2016, 41: 355-364.
35	Palacios A, García W, Rengel B. Flame shapes and thermal fluxes for an extensive range of horizontal jet flames[J]. Fuel, 2020, 279: 118328.
36	孔祥晓. 不同喷射方向湍流射流火焰撞壁行为特征研究[D]. 合肥: 中国科学技术大学, 2021.
	Kong X X. Research on the behavior characteristics of turbulent jet flame impinging on the wall with different jet directions[D]. Hefei: University of Science and Technology of China, 2021.
37	Huang Y B, Li Y F, Dong B Y, et al. Predicting the main geometrical features of horizontal rectangular source fuel jet fires[J]. Journal of the Energy Institute, 2018, 91(6): 1153-1163.
38	Palacios A, Rengel B. Computational analysis of vertical and horizontal jet fires[J]. Journal of Loss Prevention in the Process Industries, 2020, 65: 104096.
39	Armaly B F, Durst F, Pereira J C F, et al. Experimental and theoretical investigation of backward-facing step flow[J]. Journal of Fluid Mechanics, 1983, 127: 473.
40	Delichatsios M A. Transition from momentum to buoyancy-controlled turbulent jet diffusion flames and flame height relationships[J]. Combustion and Flame, 1993, 92(4): 349-364.
41	Sonju O K, Hustad J. An experimental study of turbulent jet diffusion flames[J]. Norwegian Maritime Research, 1984, 4(12): 2-11.
42	Santos A, Costa M. Reexamination of the scaling laws for NO _x emissions from hydrocarbon turbulent jet diffusion flames[J]. Combustion and Flame, 2005, 142(1/2): 160-169.
43	Kiran D Y, Mishra D P. Experimental studies of flame stability and emission characteristics of simple LPG jet diffusion flame[J]. Fuel, 2007, 86(10/11): 1545-1551.
44	耿晓茹. 障碍物对天然气管道喷射火影响的实验及数值模拟研究[D]. 东营: 中国石油大学(华东), 2018.
	Geng X R. Experiment and numerical simulation of influence of obstacles on jet fire in natural gas pipelines[D]. Dongying: China University of Petroleum, 2018.

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