开放空间高压氢气射流中点火爆炸的实验研究

马梦飞; 於星; 张爱凤; 张佳庆; 祝现礼; 王昌建

doi:10.11883/bzycj-2023-0037

开放空间高压氢气射流中点火爆炸的实验研究

doi: 10.11883/bzycj-2023-0037

马梦飞^{1, 2,},
於星^{1, 2},
张爱凤^{1, 2},
张佳庆^{3, 4},
祝现礼^{3, 4},
王昌建^{1, 5, ,}

1.
合肥工业大学土木与水利工程学院，安徽合肥 230009
2.
安徽国际氢能安全联合研究中心，安徽合肥 230009
3.
国家电网安徽省电力科学研究院，安徽合肥 230088
4.
电力火灾与安全防护安徽省重点实验室，安徽合肥 230088
5.
安全关键工业测控教育部工程研究中心，安徽合肥 230009

基金项目: 国家重点研发计划项目（2021YFB4001004）；国家电网公司总部科技项目（5419-202219075A-1-1-ZN）

详细信息

作者简介:
马梦飞（1998－　），男，硕士研究生，1625388658@qq.com

通讯作者:
王昌建（1975－　），男，博士，教授，博士生导师，chjwang@hfut.edu.cn

中图分类号: O383.1
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- 文章访问数: 25
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- PDF下载量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2023-02-10
- 修回日期: 2024-01-03
- 网络出版日期: 2024-04-17

Experimental study on ignition and explosion of high-pressure hydrogen jet in open space

MA Mengfei^{1, 2
,},
YU Xing^{1, 2},
ZHANG Aifeng^{1, 2},
ZHANG Jiaqing^{3, 4},
ZHU Xianli^{3, 4},
WANG Changjian^{1, 5
, ,}

1.
School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
2.
Anhui International Joint Research Center on Hydrogen Safety, Hefei 230009, Anhui, China
3.
State Grid Anhui Electric Power Research Institute, Hefei 230088, Anhui, China
4.
Anhui Province Key Laboratory for Electric Fire and Safety Protection, Hefei 230088, Anhui, China
5.
Engineering Research Center of Safety Critical Industrial Measurement and Control Technology, Ministry of Education, Hefei 230009, Anhui, China

摘要

摘要: 采用高速相机和压力传感器，对开放空间中稳态射流氢气点火爆炸初期的火焰行为和超压变化规律进行了实验研究。结果表明：在点火爆炸初期，火焰在点火电极处以球形向外扩散；爆炸后4~6 ms，火焰前锋达到最大位移，之后逐渐熄灭，最后形成射流火焰。火焰前锋位移主要受喷嘴直径影响，并随喷嘴直径的增大而增大。火焰宽度的变化规律与火焰前锋位移基本相似。整个爆炸过程仅出现1个超压峰值，正压维持时间约为1 ms。在同一点火距离处，峰值超压随氢气流量的增加而增大。在相同氢气流量下，峰值超压随点火距离的增大而减小。最大峰值超压与氢气流量成正比，与点火距离成反比。
- 氢气爆炸 /
- 火焰前锋位移 /
- 火焰宽度 /
- 最大峰值超压
Abstract: A high-speed camera and pressure transducers were employed to record the flame shape and overpressure, and the experiments were carried out on the flame behaviors and overpressure evolutions at the initial stage of ignition and explosion of steady-state hydrogen jet in open space. The results show that, at the early stage of ignition and explosion, the flame propagates outward from the ignition electrode in a spherical shape. After 4~6 ms, the flame front reaches its maximum displacement, gradually extinguishes, and finally forms a jet flame. The displacement of the flame front is mainly affected by the nozzle diameter and increases with the nozzle diameter. The variations of flame width are basically similar to those of the flame front displacement. The entire explosion process only experienced one overpressure peak, with a positive pressure maintained for approximately 1 ms. At the same ignition distance, the peak overpressure increases with hydrogen flow rate. At the same hydrogen flow rate, the peak overpressure decreases with increasing ignition distance. The maximum peak overpressure is directly proportional to the hydrogen flow rate and inversely proportional to the ignition distance.
- hydrogen explosion /
- flame front displacement /
- flame width /
- maximum peak overpressure

HTML全文

图 1 实验装置示意图

Figure 1. Layout of the experimental apparatus

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图 2 氢气火焰图像处理过程（工况18，p₀=0.5 MPa, d=4 mm）

Figure 2. Image processing of hydrogen flame (Case 18, p₀=0.5 MPa, d=4 mm)

下载: 全尺寸图片幻灯片

图 3 初始阶段火焰演变过程（工况18，p₀=0.5 MPa, d=4 mm）

Figure 3. Evolutions of the flame at the initial stage (Case 18, p₀=0.5 MPa, d=4 mm)

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图 4 平均体积分数随距离的变化（工况18，p₀=0.5 MPa, d=4 mm）

Figure 4. Variation of mean concentration with distance (Case 18, p₀=0.5 MPa, d=4 mm)

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图 5 3 ms时氢气火焰前锋位移和宽度

Figure 5. Hydrogen flame front displacement and width at 3 ms

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图 6 火焰前锋位移和宽度随点火距离的变化

Figure 6. Variations of flame front displacement and width with ignition distance

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图 7 超压随时间变化趋势（工况17, p₀=0.5 MPa, d=4 mm）

Figure 7. Evolution of overpressure with time (Case 17, p₀=0.5 MPa, d=4 mm)

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图 8 不同流量下峰值超压随点火距离的变化

Figure 8. Evolution of peak overpressure with ignition distance at different flow rates

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图 9 不同点火距离下最大峰值超压随流量的变化

Figure 9. Relation between the flow rate and maximum peak overpressure at different ignition distances

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图 10 最大峰值超压与点火距离的关系

Figure 10. Relationship between the maximum peak overpressure and ignition distance

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表 1 氢气点火实验参数

Table 1. Experimental parameters of hydrogen ignition

工况	d/mm	点火距离/cm	p₀/MPa	m/（g·s⁻¹）	最大火焰前锋位移/mm	$ \bar c $
1	2	16	0.3	0.78	229.6	0.314
2	2	20	0.3	0.78	199.5	0.254
3	2	30	0.3	0.78	73.5	0.171
4	2	37	0.3	0.78
5	2	16	0.5	1.17	339.5	0.325
6	2	20	0.5	1.17	267.4	0.269
7	2	30	0.5	1.17	147.0	0.188
8	2	37	0.5	1.17	145.6	0.156
9	2	16	0.7	1.56	387.8	0.322
10	2	20	0.7	1.56	338.8	0.282
11	2	30	0.7	1.56	229.6	0.196
12	2	37	0.7	1.56	88.2	0.164
13	3	16	0.5	2.64	350.0	0.449
14	3	20	0.5	2.64	338.1	0.377
15	3	30	0.5	2.64	348.6	0.269
16	3	37	0.5	2.64	264.6	0.224
17	4	16	0.5	4.69	576.5	0.574
18	4	20	0.5	4.69	592.2	0.471
19	4	30	0.5	4.69	321.3	0.342
20	4	37	0.5	4.69	342.3	0.287

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