柴油的抛撒成雾及燃爆特性研究

罗琳; 解立峰; 韩志伟; 黄勇

doi:10.11858/gywlxb.2015.03.008

柴油的抛撒成雾及燃爆特性研究

doi: 10.11858/gywlxb.2015.03.008

南京理工大学化工学院，江苏南京 210094

基金项目: 科技部国际科技合作重大专项(2013DFR60080)

详细信息

作者简介:
罗琳(1989-), 女, 硕士研究生, 主要从事安全科学相关研究.E-mail:294288110@qq.com

通讯作者:
解立峰(1965—), 男，教授，主要从事安全科学及工程力学相关研究.E-mail:xielifeng319@sina.com

中图分类号: O389;X932
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出版历程
- 收稿日期: 2014-05-29
- 修回日期: 2014-07-29

Cloud Character in Explosion Dispersion and Combustion Feature of Diesel

Institute of Chemical Industry, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 为了研究柴油、阻燃柴油、阻燃抑爆柴油的抛撒成雾及燃爆特性，使用高速摄像系统记录云雾形成过程，采用红外热成像系统记录火球演变情况。研究表明：在中心药柱爆轰驱动下，油料液滴与空气快速混合形成云雾，其尺寸随油料运动黏度的增大而减小；3种柴油形成的云雾均在二次引爆后产生火球，阻燃柴油的火球最高温度较柴油低35%，阻燃抑爆柴油较阻燃柴油低23%；阻燃柴油的火球最大直径和高度较柴油小54%、42%，阻燃抑爆柴油较阻燃柴油小46%、55%；火球持续时间，阻燃柴油较柴油短38%，阻燃抑爆柴油较阻燃柴油短47%。说明在抑制火球温度上升和尺寸增长的效果上，阻燃抑爆柴油优于阻燃柴油，阻燃柴油优于柴油。
- 柴油 /
- 爆炸抛撒 /
- 云雾 /
- 二次爆炸 /
- 火球
Abstract: In this study, the dispersion, cloud forming process and combustion explosion properties of diesel, combustion retardant diesel and explosion suppression diesel were investigated.A high-speed video camera system was employed to record the process of cloud forming, and an infrared thermal imaging system to record the fireball evolution process.The results show that under the driving force of shock wave from the center initiation explosive, the diesel droplets mix with air rapidly to form cloud.The size of cloud decreases as the kinematic viscosity of diesel increases.Afterwards, fireball appears after the secondary initiation.The highest fireball temperature of combustion retardant diesel decreases 35% compared with diesel, and that of explosion suppression diesel decreases 23% compared with combustion retardant diesel.The maximum fireball diameter and height of combustion retardant diesel reduce 54% and 42% respectively compared with diesel, and those of explosion suppression diesel reduce 46% and 55% respectively compared with combustion retardant diesel.The fireball duration of combustion retardant diesel shortens 38% compared with diesel and that of explosion suppression diesel shortens 47% compared with combustion retardant diesel.Therefore, explosion suppression diesel is better than combustion retardant diesel and combustion retardant diesel is better than diesel in preventing temperature and size growth of fireballs.
- diesel /
- explosive dispersion /
- cloud /
- secondary explosion /
- fireball

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图 1 实验装置及布局

Figure 1. Experimental device and layout

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图 2 实验布置示意图

Figure 2. Schematic of the experimental field

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图 3 云雾直径随时间的变化关系

Figure 3. Relationship between cloud diameter and time

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图 4 云雾高度随时间的变化关系

Figure 4. Relationship between cloud height and time

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图 5 3种油料燃爆过程的典型照片(从左至右拍摄时刻依次为40、400、500、600、800、1 400、2 000 ms)

Figure 5. Typical photos of combustion and explosion process for 3 diesels at 40, 400, 500, 600, 800, 1 400 and 2 000 ms

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图 6 3种油料最高温火球照片

Figure 6. Pictures of fireballs of 3 diesels at their highest temperature

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图 7 3种油料火球的温度随时间的变化关系

Figure 7. Relationship between the fireball temperature and time for 3 diesels

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图 8 火球直径随时间的变化关系

Figure 8. Fireball diameter changing with time

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图 9 火球高度随时间的变化关系

Figure 9. Fireball height changing with time

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表 1 3种柴油的物理特性

Table 1. Physical properties of 3 kinds of diesel

Presciption	Kinematic viscosity/(mm²/s)	Flashing lightning/(℃)	Density/(kg/m³)
Diesel	3.934	84	808
Combustion retardant disel	6.892	82	826
Explosion suppression diesel	20.960	85	834

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表 2 火球温度和最高温火球的尺寸

Table 2. Fireball temperature and fireball size at the highest temperature

Presciption	Highest temperature/ (℃)	The continuous time of temperature over 1 000 ℃/(ms)	Diameter of fireball at the highest temperature/(m)	Height of fireball at the highest temperature/(m)
Diesel	1 422.5	170	6.5	2.6
Combustion retardant diesel	927.7	0	2.2	1.3
Explosion suppression diesel	715.7	0	1.8	1.1

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