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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