破膜压力对氢气-甲烷-空气泄爆的影响

陈昊; 郭进; 王金贵; 洪溢都

doi:10.11883/bzycj-2021-0418

破膜压力对氢气-甲烷-空气泄爆的影响

doi: 10.11883/bzycj-2021-0418

福州大学环境与安全工程学院，福建福州 350108

基金项目: 国家自然科学基金(51904285)，福建省自然科学基金(2020J01505)；

详细信息

作者简介:
陈　昊（1997－　），男，硕士研究生，1356954737@qq.com

通讯作者:
洪溢都（1989－　），男，博士，讲师，yidu.hong@fzu.edu.cn

中图分类号: O389
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- 文章访问数: 241
- HTML全文浏览量: 149
- PDF下载量: 44
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-08
- 修回日期: 2021-11-25
- 网络出版日期: 2022-09-29
- 刊出日期: 2022-11-18

Effects of vent burst pressure on hydrogen-methane-air deflagration in a vented duct

College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350108, Fujian, China

摘要

摘要: 选取了300 mm×300 mm×1000 mm、顶部设有250 mm×250 mm泄爆口的管道，用不同厚度的铝箔密封泄爆口，注入氢气-甲烷-空气混合气体，进行泄爆实验，研究了0~44 kPa的爆破压力($ {p}_{\mathrm{v}} $)对火焰演化和管道内外压力变化的影响。结果表明，$ {p}_{\mathrm{v}} $会显著影响管道中火传焰播过程以及压力-时间变化曲线；所有实验中均观察到了内部压力的亥姆霍兹振荡，振荡频率随着${p}_{{\rm{v}}}$的增加而增大；当$ {p}_{\mathrm{v}} $≥12 kPa时会出现频率约为1200 Hz的声学振荡。对于某一确定的$ {p}_{\mathrm{v}} $，管道内最大内部超压随至泄爆口距离增加而增大；靠近泄爆口处和管道中心的最大内部超压几乎随着$ {p}_{\mathrm{v}} $呈线性增加，但是靠近底部处的最大压力与$ {p}_{\mathrm{v}} $呈非线性递增关系，外部爆炸所产生的压力峰值随$ {p}_{\mathrm{v}} $的增加而增大。
- 泄爆 /
- 掺氢甲烷 /
- 静态破膜压力 /
- 超压 /
- 火焰
Abstract: The effect of the static burst pressure of the vent cover (${p}_{{\rm{v}}}$) on the flame evolution of hydrogen–methane–air deflagration and pressure buildup inside and outside the duct was studied. A series of vented deflagration experiments of hydrogen-methane-air mixtures were carried out in a 300 mm long, 300 mm wide, and 1000 mm high duct with a 250 mm × 250 mm vent at the top. Stoichiometric hythane–air mixtures were prepared according to Dalton’s law of partial pressure. The mixed gas was ignited at the vessel center by an electric spark. The explosion flames were recorded by a high-speed camera at 2000 frames per second. Piezoresistive pressure sensors were used to record the internal and external overpressures. Experimental results reveal that ${p}_{{\rm{v}}}$ significantly affects the pressure-time histories and the flame propagation in the duct. Helmholtz-type oscillations of the internal pressure at the lower flame front were observed in all tests, with the oscillation frequency increasing with ${p}_{{\rm{v}}}$. Acoustic oscillations with a ~1200-Hz frequency occur when ${p}_{{\rm{v}}}$≥12 kPa. The maximum internal overpressure increases with the distance to the vent. The maximum internal overpressures near the vent and at the duct center increase almost linearly with ${p}_{{\rm{v}}}$. However, the maximum internal overpressure at the duct bottom is not increasing monotonically with ${p}_{{\rm{v}}}$. The pressure peak resulting from the external explosion, which increases with ${p}_{{\rm{v}}},$ always dominates the external pressure–time histories. In addition, external explosion affects the venting process in all tests, but the effect is significantly weakened when ${p}_{{\rm{v}}}$ ≥ 31 kPa.
- explosion venting /
- hythane /
- static burst pressure /
- overpressure /
- flame

HTML全文

图 1 实验装置

Figure 1. Experimental apparatus.

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图 2 $ \delta $=36 μm时静态破膜压力测试的压力-时间变化

Figure 2. Pressure-time history in the static burst pressure test at $ \delta $=36 μm

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图 3 $ {p}_{\mathrm{v}} $与$ \delta $的关系图

Figure 3. Relationship between $ {p}_{\mathrm{v}} $ and$ \delta $

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图 4 $ {p}_{\mathrm{v}} $＝31 kPa时的火焰图像

Figure 4. Flame images for $ {p}_{\mathrm{v}} $=31 kPa

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图 5 $ {p}_{\mathrm{v}} $=31 kPa时火焰前沿的位置和速度

Figure 5. Flame front location and speed for $ {p}_{\mathrm{v}} $=31 kPa.

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图 6 $ {p}_{\mathrm{v}} $=14 kPa时管道内压力-时间变化曲线

Figure 6. Pressure-time history inside the duct for $ {p}_{\mathrm{v}} $=14 kPa.

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图 7 不同破膜压力$ {p}_{\mathrm{v}} $的压力-时间变化曲线

Figure 7. Internal pressure–time histories for different $ {p}_{\mathrm{v}} $

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图 8 最大内部超压与$ {p}_{\mathrm{v}} $之间的关系(实心符表示平均值)

Figure 8. Relationship between the maximum internal overpressure and $ {p}_{\mathrm{v}} $ (solid symbols present the mean values)

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图 9 不同$ {p}_{\mathrm{v}} $条件下外部压力-时间变化曲线

Figure 9. External pressure–time histories for various $ {p}_{\mathrm{v}} $

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图 10 最大外部超压$ p_4 $与破膜压力$ {p}_{\mathrm{v}} $(实心符表示平均值)

Figure 10. Relationship between the maximum external overpressure $ p_4 $and film breaking pressuer $ {p}_{\mathrm{v}} $ (solid symbols present the mean values)

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图 11 外部爆炸对内部泄爆的影响

Figure 11. Effect of the external explosion on internal explosion venting

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参考文献(36)

[1]	HUANG Z H, ZHANG Y, ZENG K, et al. Measurements of laminar burning velocities for natural gas–hydrogen–air mixtures [J]. Combustion and Flame, 2006, 146(1/2): 302–311. DOI: 10.1016/j.combustflame.2006.03.003.
[2]	HU E J, HUANG Z H, HE J J. et al. Experimental and numerical study on lean premixed methane-hydrogen-air flames at elevated pressures and temperatures [J]. International Journal of Hydrogen Energy, 2009, 34(16): 6951–6960. DOI: 10.1016/j.ijhydene.2009.06.072.
[3]	LI Y C, BI M S, LI B, et al. Effects of hydrogen and initial pressure on flame characteristics and explosion pressure of methane/hydrogen fuels [J]. Fuel, 2018, 233: 269–282. DOI: 10.1016/j.fuel.2018.06.042.
[4]	ZHENG K, YU M G, ZHENG L G, et al. Experimental study on premixed flame propagation of hydrogen/methane/air deflagration in closed ducts [J]. International Journal of Hydrogen Energy, 2017, 42(8): 5426–5438. DOI: 10.1016/j.ijhydene.2016.10.106.
[5]	王亚磊, 郑立刚, 于水军, 等. 约束端面对管内甲烷爆炸特性的影响 [J]. 爆炸与冲击, 2019, 39(9): 095401. DOI: 10.11883/bzycj-2018-0249. WANG Y L, ZHENG L G, YU S J, et al. Effect of vented end faces on characteristics of methane explosion in duct [J]. Explosion and Shock Waves, 2019, 39(9): 095401. DOI: 10.11883/bzycj-2018-0249.
[6]	叶经方, 姜孝海, 贾正望, 等. 泄爆诱导二次爆炸的实验研究 [J]. 爆炸与冲击, 2004, 24(4): 356–362. YE J F, JIANG X H, JIA Z W, et al. Experimental investigations of external second-explosion induced by vented explosion [J]. Explosion and Shock Waves, 2004, 24(4): 356–362.
[7]	MA Q J, ZHANG Q, CHEN J C, et al. Effects of hydrogen on combustion characteristics of methane in air [J]. International Journal of Hydrogen Energy, 2014, 39(21): 11291–11298. DOI: 10.1016/j.ijhydene.2014.05.030.
[8]	胡俊, 万士昕, 浦以康, 等. 柱形容器开口泄爆过程中的火焰传播特性 [J]. 爆炸与冲击, 2004, 24(4): 330–336. HU J, WAN S X, PU Y K, et al. The characteristics of flame propagation during explosion venting from cylindrical vessel [J]. Explosion and Shock Waves, 2004, 24(4): 330–336.
[9]	李乾, 冯梦梦, 马力, 等. 不同泄压条件对方管内爆炸压力特性的影响 [J]. 爆炸与冲击, 2019, 39(7): 072202. DOI: 10.11883/bzycj-2018-0132. LI Q, FENG M M, MA L, et al. Influence of different pressure relief conditions on explosion pressure in square pipeline [J]. Explosion and Shock Waves, 2019, 39(7): 072202. DOI: 10.11883/bzycj-2018-0132.
[10]	孙玮, 王志荣, 马龙生, 等. 连通容器泄爆过程的影响因素 [J]. 爆炸与冲击, 2016, 36(4): 457–464. DOI: 10.11883/1001-1455(2016)04-0457-08. SUN W, WANG Z R, MA L S, et al. Influence factors of gas explosion venting in linked vessels [J]. Explosion and Shock Waves, 2016, 36(4): 457–464. DOI: 10.11883/1001-1455(2016)04-0457-08.
[11]	YU M G, ZHENG K, ZHENG L G, et al. Effects of hydrogen addition on propagation characteristics of premixed methane/air flames [J]. Journal of Loss Prevention in the Process Industries, 2015, 34: 1–9. DOI: 10.1016/j.jlp.2015.01.017.
[12]	YU M G, ZHENG K, ZHENG L G, et al. Scale effects on premixed flame propagation of hydrogen/methane deflagration [J]. International Journal of Hydrogen Energy, 2015, 40(38): 13121–13133. DOI: 10.1016/j.ijhydene.2015.07.143.
[13]	WANG J, WU Y, SHAN W W, et al. Effect of variable cross-section duct on flame propagation characteristics of premixed hydrogen/methane/air combustible gas [J]. Combustion Science and Technology, 2021, 193(8): 1425–1443. DOI: 10.1080/00102202.2019.1697244.
[14]	ZHENG K, YU M G, ZHENG L G, et al. Effects of hydrogen addition on methane–air deflagration in obstructed chamber [J]. Experimental Thermal and Fluid Science, 2017, 80: 270–280. DOI: 10.1016/j.expthermflusci.2016.08.025.
[15]	LOWESMITH B J, MUMBY C, HANKINSON G, et al. Vented confined explosions involving methane/hydrogen mixtures [J]. International Journal of Hydrogen Energy, 2011, 36(3): 2337–2343. DOI: 10.1016/j.ijhydene.2010.02.084.
[16]	SHIRVILL L C, ROBERTS T A, ROYLE M, et al. Experimental study of hydrogen explosion in repeated pipe congestion: Part 2: effects of increase in hydrogen concentration in hydrogen-methane-air mixture [J]. International Journal of Hydrogen Energy, 2019, 44(5): 3264–3276. DOI: 10.1016/j.ijhydene.2018.12.021.
[17]	YANG J, GUO J, WANG C H, et al. Effect of equivalence ratio on hydrogen-methane-air deflagration in a duct with an open end [J]. Fuel, 2020, 280: 118694. DOI: 10.1016/j.fuel.2020.118694.
[18]	DUAN Z P, GUO J, WANG X B, et al. Experiments on vented deflagration of stoichiometric hydrogen-methane-air mixtures: effect of hydrogen fraction [J]. International Journal of Hydrogen Energy, 2020, 45(46): 25615–25622. DOI: 10.1016/j.ijhydene.2020.06.286.
[19]	RUDY W, ZBIKOWSKI M, TEODORCZYK A. Detonations in hydrogen-methane-air mixtures in semi confined flat channels [J]. Energy, 2016, 116: 1479–1483. DOI: 10.1016/j.energy.2016.06.001.
[20]	曹勇, 郭进, 胡坤伦, 等. 点火位置对氢气-空气预混气体泄爆过程的影响 [J]. 爆炸与冲击, 2016, 36(6): 847–852. DOI: 10.11883/1001-1455(2016)06-0847-06. CAO Y, GUO J, HU K L, et al. Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures [J]. Explosion and Shock Waves, 2016, 36(6): 847–852. DOI: 10.11883/1001-1455(2016)06-0847-06.
[21]	GUO J, WANG C J, LI Q, et al. Effect of the vent burst pressure on explosion venting of rich methane–air mixtures in a cylindrical vessel [J]. Journal of Loss Prevention in the Process Industries, 2016, 40: 82–88. DOI: 10.1016/j.jlp.2015.12.006.
[22]	RUI S C, GUO J, LI G, et al. The effect of vent burst pressure on a vented hydrogen–air deflagration in a 1 m³ vessel [J]. International Journal of Hydrogen Energy, 2018, 43(45): 21169–21176. DOI: 10.1016/j.ijhydene.2018.09.124.
[23]	孙松, 王明洋, 高康华, 等. 大尺度泄爆构件对室内爆燃压力影响的实验研究 [J]. 爆炸与冲击, 2018, 38(2): 359–366. DOI: 10.11883/bzycj-2016-0211. SUN S, WANG M Y, GAO K H, et al. Experimental study on effect of large-scale explosion venting component on interior deglagration pressure [J]. Explosion and Shock Waves, 2018, 38(2): 359–366. DOI: 10.11883/bzycj-2016-0211.
[24]	American National Standards Institute. NFPA 68 Standard on explosion protection by deflagration venting [S]. Quincy: National Fire Protection Association, 2007.
[25]	KUZNETSOV M, FRIEDRICH A, STERN G, et al. Medium-scale experiments on vented hydrogen deflagration [J]. Journal of Loss Prevention in the Process Industries, 2015, 36: 416–428. DOI: 10.1016/j.jlp.2015.04.013.
[26]	GUO J, WANG C J, LIU X Y. Experimental study on duct-vented explosion of hydrogen–air mixtures in a wide range of equivalence ratio [J]. Industrial & Engineering Chemistry Research, 2016, 55(35): 9518–9523. DOI: 10.1021/acs.iecr.6b02029.
[27]	PROUST C, LEPRETTE E. The dynamics of vented gas explosions [J]. Process Safety Progress, 2010, 29(3): 231–235. DOI: 10.1002/prs.10368.
[28]	WANG J G, GUO J, YANG F Q, et al. Effects of hydrogen concentration on the vented deflagration of hydrogen–air mixtures in a 1-m³ vessel [J]. International Journal of Hydrogen Energy, 2018, 43(45): 21161–21168. DOI: 10.1016/j.ijhydene.2018.09.108.
[29]	BAUWENS C R L, CHAFFEE J, DOROFEEV S A. Experimental and numerical study of methane–air deflagrations in a vented enclosure [J]. Fire Safety Science, 2009, 9: 1043–1054. DOI: 10.3801/iafss.fss.9-1043.
[30]	LI Q Q, HU E J, CHENG Y, et al. Measurements of laminar flame speeds and flame instability analysis of 2-methyl-1-butanol-air mixtures [J]. Fuel, 2013, 112: 263–271. DOI: 10.1016/j.fuel.2013.05.039.
[31]	BAUWENS C R, CHAFFEE J, DOROFEEV S. Effect of instabilities and acoustics on pressure generated in vented propane-air explosions [C]// Proceedings of the 22nd International Colloquium on the Dynamics of Explosions and Reactive Systems. Minsk, Belarus, 2009.
[32]	MCCANN D P J, THOMAS G O, EDWARDS D H. Gasdynamics of vented explosions Part I: experimental studies [J]. Combustion and Flame, 1985, 59(3): 233–250. DOI: 10.1016/0010-2180(85)90128-2.
[33]	COOPER M G, FAIRWEATHER M, TITE J P. On the mechanisms of pressure generation in vented explosions [J]. Combustion and Flame, 1986, 65(1): 1–14. DOI: 10.1016/0010-2180(86)90067-2.
[34]	BAO Q, FANG Q, ZHANG Y D, et al. Effects of gas concentration and venting pressure on overpressure transients during vented explosion of methane–air mixtures [J]. Fuel, 2016, 175: 40–48. DOI: 10.1016/j.fuel.2016.01.084.
[35]	TOMLIN G, JOHNSON D M, CRONIN P, et al. The effect of vent size and congestion in large-scale vented natural gas/air explosions [J]. Journal of Loss Prevention in the Process Industries, 2015, 35: 169–181. DOI: 10.1016/j.jlp.2015.04.014.
[36]	曹勇. 点火位置对氢气-空气泄爆特性影响的实验研究 [D]. 淮南: 安徽理工大学, 2016: 27–38. CAO Y. Effect of ignition locations on vented explosion characteristic of premixed hydrogen-air mixtures [D]. Huainan: Anhui University of Science & Technology, 2016: 27–38.