初始压力和狭缝宽度对毫米量级狭缝内爆轰起爆距离的影响

张彭岗; 朱跃进; 潘振华; 王谦

doi:10.11883/1001-1455(2016)04-0441-08

初始压力和狭缝宽度对毫米量级狭缝内爆轰起爆距离的影响

doi: 10.11883/1001-1455(2016)04-0441-08

江苏大学能源与动力工程学院, 江苏镇江 212013

基金项目:

国家自然科学基金项目 51306073

国家自然科学基金项目 11402102

江苏省自然科学基金项目 BK20130510

江苏省自然科学基金项目 BK20140524

详细信息

作者简介:
张彭岗(1974—)，男，博士，讲师

通讯作者:
朱跃进, zyjwind @163.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2015-01-09
- 修回日期: 2015-04-16
- 刊出日期: 2016-07-25

Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width

School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

摘要

摘要: 为获得狭缝内爆轰起爆距离的影响因素，分别在高度为1.0 mm，宽度为10、20、30 mm的狭缝爆轰管内，对不同初始压力下(p₀=5.0~50.0 kPa)等当量比的乙烯/氧气预混气体进行了单次爆轰性能实验研究。根据烟迹法、高速摄影图片判定起爆位置，分析了初始压力和狭缝宽度对爆轰起爆距离的影响。结果表明：(1)p₀=21.0~30.0 kPa时，起爆距离随着狭缝宽度的增大而逐渐缩短；(2)p₀=35.0~42.5 kPa时，起爆距离随着狭缝宽度的增大先缩短后增大，在p₀=45.0~50.0 kPa时起爆距离随着狭缝宽度的增大基本保持不变；(3)3种狭缝宽度下，量纲一起爆距离随量纲一初始压力的变化曲线差异较大。
- 爆炸力学 /
- 起爆距离 /
- 烟迹法 /
- 微爆轰 /
- 微燃烧 /
- 狭缝
Abstract: The detonation initiation distance for stoichiometric C₂H₄/O₂ mixture gas in a narrow gap was experimentally studied at the initial pressure of 5.0-50.0 kPa. The channels were formed by the 10, 20, 30 mm×1.0 mm cross-sections and 1 220 mm long, respectively. the initiation positions were determined by the soot records and the high-speed digital imagings. The influence of initial pressure and gap width on detonation initiation distance was analyzed. The results indicate that: (1) initiation distance decreases with the increase of gap width at the initial pressure of 21.0-30.0 kPa; (2) with the increase of gap width, initiation distance initially decreases and then increases at the initial pressure of 35.0-42.5 kPa, and remains unchanged at the initial pressure of 45.0-50.0 kPa; (3) the non-dimensional change curves between detonation initiation distance and initial pressure are different corresponding to the three different gap widths.
- mechanics of explosion /
- initiation distance /
- soot records /
- micro-detonation /
- micro-combustion /
- narrow gap

HTML全文

图 1 实验系统示意图及实物图

Figure 1. Schematic diagram and photo of experimental system

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图 2 爆轰起爆距离

Figure 2. Initiation distance of detonation wave

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图 3 可爆范围的确定

Figure 3. Determination of detonable range

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图 4 狭缝宽度对起爆距离的影响

Figure 4. Initiation distance varying with gap width

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图 5 p₀=25.0 kPa时火焰速度、胞格及高速摄影图

Figure 5. Flame velocity, cell and high-speed imagings at p₀=25.0 kPa

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图 6 狭缝宽度对起爆距离的影响

Figure 6. Initiation distance varying with gap width

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图 7 p₀=35.0 kPa时火焰速度、胞格及高速摄影图

Figure 7. Flame velocity, cell and high-speed imagings at p₀=35.0 kPa

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图 8 起爆距离随初始压力的变化

Figure 8. Initiation distance varying with initial pressure

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参考文献(19)

[1]	Silvestrini M, Genova B, Parisi G, et al. Flame acceleration and DDT run-up distance for smooth and obstacles filled tubes[J]. Journal of Loss Prevention in the Process Industries, 2008, 21(6):555-562. https://www.sciencedirect.com/science/article/abs/pii/S0950423008000454
[2]	Blanchard R, Arndt D, Grätz R, et al. Effect of ignition position on the run-up distance to DDT for hydrogen-air explosions[J]. Journal of Loss Prevention in the Process Industries, 2011, 24(2):194-199. doi: 10.1016/j.jlp.2010.12.007
[3]	Wu M H, Burke M P, Son S F, et al. Flame acceleration and the transition to detonation of stoichiometric ethylene/oxygen in microscale tubes[J]. Proceedings of the Combustion Institute, 2007, 31(2):2429-2436. doi: 10.1016/j.proci.2006.08.098
[4]	Chao J, Ng H D, Lee J H S. Detonability limits in thin annular channels[J]. Proceeding of the Combustion Institute, 2009, 32(2):2349-2354. doi: 10.1016/j.proci.2008.05.090
[5]	Camargo A, Hg H D, Chao J, et al. Propagation of near-limit gaseous detonations in small diameter tubes[J]. Shock Waves, 2010, 20(6):499-508. doi: 10.1007/s00193-010-0253-3
[6]	Fay J A. Two-dimensional gaseous detonations:Velocity deficit[J]. Physics of Fluids, 1959, 2(3):283-290. doi: 10.1063/1.1705924
[7]	Kitano S, Fukao M, Susa A, et al. Spinning detonation and velocity deficit in small diameter tubes[J]. Proceeding of the Combustion Institute, 2009, 32(2):2355-2362. doi: 10.1016/j.proci.2008.06.119
[8]	Ishii K, Itoh K, Tsuboi T. A study on velocity deficits of detonation waves in narrow gaps[J]. Proceeding of the Combustion Institute, 2002, 29(2):2789-2794. doi: 10.1016/S1540-7489(02)80340-6
[9]	Gao Y, Lee J H S, Ng H D. Velocity fluctuation near the detonation limits[J]. Combustion and Flame, 2014, 161(11):2982-2990. doi: 10.1016/j.combustflame.2014.04.020
[10]	Wu M H, Wang C Y. Reaction propagation modes in millimeter-scale tubes for ethylene/oxygen mixtures[J]. Proceedings of the Combustion Institute, 2011, 33(2):2287-2293. doi: 10.1016/j.proci.2010.07.081
[11]	Wu M H, Kuo W C. Accelerative expansion and DDT of stoichiometric ethylene/oxygen flame rings in micro-gaps[J]. Proceedings of the Combustion Institute, 2013, 34(2):2017-2024. doi: 10.1016/j.proci.2012.07.008
[12]	Nagai K, Okabe T, Kim K, et al. A study on DDT processes in a narrow channel[C]//Proceeding of the 26th International Symposium on Shock Waves. Berlin: Springer, 2009(1): 203-208.
[13]	Ivanov M F, Kiverin A D, Liberman M A. Hydrogen-oxygen flame acceleration and transition to detonation in channels with no-slip walls for a detailed chemical reaction model[J]. Physical Review E, 2011, 83(5):056313-1-056313-16. http://med.wanfangdata.com.cn/Paper/Detail/PeriodicalPaper_PM21728653
[14]	Akkerman V, Law C K, Bychkov V. Analysis of flame acceleration induced by wall friction in open tubes[J]. Physics of Fluids, 2010, 22(5):053606-1-053606-14. http://d.old.wanfangdata.com.cn/OAPaper/oai_arXiv.org_1210.8041
[15]	Kagan L, Sivashinsky G. On the transition from deflagration to detonation in narrow tubes[J]. Flow Turbulence Combustion, 2010, 84(3):423-437. doi: 10.1007/s10494-010-9252-9
[16]	靳乐, 范玮, 严传俊, 等.毫米量级微管内单次爆震[J].燃烧科学与技术, 2012, 18(4):338-343. http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201204009 Jin Le, Fan Wei, Yan Chuanjun, et al. Single-cycle detonation in millimeter-scale tube[J]. Journal of Combustion Science and Technology, 2012, 18(4):338-343. http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201204009
[17]	张超, 唐豪, 李明, 等.当量比和间隙尺寸对爆震波传播过程的影响[J].航空动力学报, 2012, 27(9):1948-1957. http://d.old.wanfangdata.com.cn/Periodical/hkdlxb201209007 Zhang Chao, Tang Hao, Li Ming, et al. Effects of equivalence ratio and gap size on the propagation behavior of detonations[J]. Journal of Aerospace Power, 2012, 27(9):1948-1957. http://d.old.wanfangdata.com.cn/Periodical/hkdlxb201209007
[18]	张彭岗, 何小民, 张靖周.不同端面密封条件下缓燃-爆震转捩特性试验[J].航空动力学报, 2009, 24(1):32-37. http://d.old.wanfangdata.com.cn/Periodical/hkdlxb200901006 Zhang Penggang, He Xiaomin, Zhang Jingzhou. Experimental study on characteristic of deflagration to detonation transition in different close end[J]. Journal of Aerospace Power, 2009, 24(1):32-37. http://d.old.wanfangdata.com.cn/Periodical/hkdlxb200901006
[19]	Ott J D, Oran E S, Anderson J D. A mechanism for flame acceleration in narrow tubes[J]. AIAA Journal, 2003, 41(7):1391-1396. doi: 10.2514/2.2088