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摘要在高5.4m，内径0.2m的立式爆轰管内，研究扩散时间（0.08h，0.5h，1.0h，2.0h，17h）对乙烯-空气混合气体燃爆参数的影响。采用下端高能炸药强起爆方式，测定了三种体积分数下（4.00%、、6.67%、8.89%）乙烯-空气体系和乙烯-黑索金-空气多相体系的燃爆参数。同时利用烟迹技术捕捉到了两个体系的爆轰波胞格。结果表明：乙烯采用上下两端进气，并静置超过1h，可以使乙烯-空气混合气体的燃爆参数趋于一致。乙烯-空气体系爆轰压力在3.5MPa～4.5MPa之间，爆速在1700m/s～1800m/s之间。乙烯-黑索金-空气多相体系的爆轰压力在4MPa～5MPa之间，爆速在1500m/s～1900m/s之间。同时发现多相体系的胞格尺寸和长宽比明显小于气相体系。21396
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关键词 立式爆轰管 气体扩散 气相爆轰 多相爆轰 胞格结构
毕业论文设计说明书（论文）外文摘要
Title The study of multiphase detonation characteristics in detonation tube
Abstract
In a vertical detonation tube with height of 5.4m, and an internal diameter of 0.2m, we studied how the diffusion time (0.08h, 0.5h, 1.0h, 2.0h, 17h) impact the C2H4-Air mixture deflagration and detonation parameters. High explosive was initiated at the bottom and the detonation pressure histories of the three different concentrations (4.00vol. %, 6.67vol. %, 8.89vol. %) C2H4-Air and C2H4-RDX-Air mixtures were measured. The detonation cellular structures of C2H4-Air and C2H4-RDX-Air mixtures were also captured by smoke foil technique. The experimental results show that: ethylene was input into the detonation tube by two sides and keeping the diffusion time at 1h, deflagration and detonation parameters was similar. The detonation pressure of C2H4-Airmixtureis 3.5MPa to 4.5MPa and the detonation velocity is 1700m/s to 1800m/s. For C2H4-RDX-Air multiphase system, the detonation pressure is 4MPa to 5MPa and detonation velocity is 1500m/s to 1900m/s. We also found that the cell size and aspect ratio (L/λ) of the multiphase system are significantly smaller than the gas phase system.
Keywords Vertical detonation tube Gas diffusion Gaseous detonation
Multiphase detonation Cellular structure
目 次
1 绪论 1
1.1 研究背景和意义 1
1.2 国内外研究现状 2
1.2.1 气相爆轰研究综述 2
1.2.2 气固两相粉尘燃爆研究综述 3
1.3 本文研究内容 5
2. 实验系统与实验方法 6
2.1 引言 6
2.2 实验系统 6
2.2.1 立式爆轰管系统 6
2.2.2 喷粉/喷雾系统 7
2.2.3 气体预混系统 8
2.2.4 点火及同步控制系统 8
2.2.5 压力测试及采集系统 9
2.2.5 胞格采集系统 10
2.3 实验方法 10
2.3.1 气密性检验 10
2.3.2 配气 11
2.3.3 粉尘浓度的确定 13
2.3.4 烟熏板的制作 13
2.4 本章小结 14
3 C2H4-Air气相燃爆参数 15
3.1 引言 15
3.2 实验条件 15
3.3 起爆能量 15
3.4 实验步骤 15
3.4 扩散时间对乙烯-空气燃爆参数的影响 16
3.4.1 问题的提出 16
3.4.2 解决方案 17
3.4.3 实验数据及结论 17