模拟立式拱顶油罐内油气爆炸实验研究

蔡运雄; 蒋新生; 王世茂; 余彬彬; 王子拓; 王春辉; 李玉玺

doi:10.11883/bzycj-2022-0012

模拟立式拱顶油罐内油气爆炸实验研究

doi: 10.11883/bzycj-2022-0012

1.
陆军勤务学院油料系，重庆 401331
2.
中国空气动力研究与发展中心空天技术研究所，四川绵阳 621000

基金项目: 国家重点研发计划（2018YFC0809502）；国家自然科学基金（51574254）；军委科技委基础加强计划重点基础研究项目（2019-JCJQ-198-04）；重庆市研究生科研创新项目（CYB20201）

详细信息

作者简介:
蔡运雄（1995－　），男，博士研究生，yunxiongcai@outlook.com

通讯作者:
蒋新生（1972－　），男，博士，教授，jxs_dy@163.com

中图分类号: O389; X932
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- 文章访问数: 551
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- 被引次数: 0
出版历程
- 收稿日期: 2022-01-10
- 修回日期: 2022-03-03
- 网络出版日期: 2022-03-29
- 刊出日期: 2022-10-31

Experimental study of gasoline-air mixture explosion in imitated vertical dome oil tank

1.
Petroleum, Oil & Lubricants Department, Army Logistics Academy, Chongqing 401331, China
2.
Aerospace Technology Institute of China Aerodynamics Research and Development Center, Mianyang 621000, Sichuan, China

摘要

摘要: 为探究立式拱顶油罐内油气体积分数、点火位置和液位对爆炸超压特性参数与火焰发展的影响规律，开展了一系列的实验研究，得到以下结果：（1）1.7%是任一工况下的最危险油气体积分数，内场超压发展都可以分为超压上升、超压泄放和振荡衰减3个阶段。爆炸过程中CH、C₂、OH等自由基的生成和空间分布，使得不同初始油气体积分数下或不同爆炸阶段的火焰呈现不同的颜色变化。（2）点火位置对油气爆炸超压特性参数的影响较大，位置越靠下，爆炸威力越大。罐底中心点火时，内外场平均升压速率取得最大值，分别为0.46和0.05 MPa/s。（3）液位变化对油气爆炸内外场超压的影响较大，油罐侧壁上部位置点火时，50%液位是最危险的液位。任意液位下外场超压随比例距离的增大都呈现幂指数衰减规律，不同液位下油气爆炸外场冲击波超压峰值与距离和油气混合物体积的关系可以用一个公式统一表示。相比于气相空间，液相空间的超压变化具有延后性、负压增强和振荡衰减更快的特点。
- 立式拱顶油罐 /
- 油气爆炸 /
- 化学反应 /
- 超压 /
- 火焰
Abstract: To investigate the influence of gasoline-air mixture volume fraction, ignition position and liquid level on explosion overpressure parameters and flame development in vertical dome oil tank, a series of experiments with nine initial hydrocarbon volume fractions, four ignition positions and five liquid levels were carried out in a transparent imitated oil tank. Dynamic data acquisition system and high-speed camera were employed to detect the changes of internal and external field pressure, and to record the transformation of flame shape. The following results were found. (1) 1.7% is the most dangerous gasoline-air mixture volume fraction under any working condition. The development of overpressure in the inner field can be divided into three stages: overpressure rise, overpressure release and oscillation attenuation. The formation and spatial distribution of free radicals such as CH, C₂ and OH during the explosion process make the flame show different color changes under different initial volume fractions or at different explosion stages. (2) Ignition position has a great influence on explosion overpressure parameters. The lower the ignition position is, the greater the explosion power is. When the ignition position is in the center of the bottom of the tank, the average pressure boost rate of the internal and external fields reaches the maximum value, being 0.464 MPa/s and 0.053 MPa/s, respectively. (3) The change of liquid level has a great influence on the overpressure of the internal and external field of oil and gas explosion. When the position ignition is located at the top of the side wall of the oil tank, the 50% liquid level is the most dangerous level. At any liquid level, the outfield overpressure decreases exponentially with the increase of scaled distance. The relationship among the maximum overpressure peak of the outfield shock wave of gasoline-air mixture explosion at different liquid levels, the distance and the volume of gasoline-air mixture can be expressed by a unified expression. Compared with gas space, the overpressure in liquid space has the characteristics of delay, enhancement of negative overpressure and faster oscillation attenuation frequency.
- vertical dome oil tank /
- gasoline-air mixture explosion /
- chemical reaction /
- overpressure /
- flame

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图 1 实验系统

Figure 1. The experimental system

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图 2 模拟油罐测点分布图

Figure 2. Simulated tank measuring point distribution diagram

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图 3 模拟油罐油气爆炸内场测点超压时序曲线

Figure 3. The time history of overpressure measurement points in the field of gasoline-air mixture explosion in simulated tank

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图 4 内外场平均升压速率与初始油气体积分数的关系

Figure 4. Average overpressure rise rate in the internal and external fields at different initial volume fractions

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图 5 不同初始体积分数的油气爆炸火焰传播图像

Figure 5. Images of flame propagation of gasoline-air mixture explosion at different initial volume fractions

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图 6 不同点火位置油气爆炸罐内火焰传播图像

Figure 6. Images of flame propagation of gasoline-air mixture explosion inside the tank at different ignition locations

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图 7 75%液位油气爆炸内外场最大超压峰值与初始油气体积分数的关系

Figure 7. The maximum overpressure peak in the internal and external field of gasoline-air mixture explosion with different initial volume fraction at 75% liquid level

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图 8 100%液位油气爆炸内外场最大超压峰值与初始油气体积分数的关系

Figure 8. The maximum overpressure peak in the internal and external field of gasoline-air mixture explosion with different initial volume fraction at 100% liquid level

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图 9 油气爆炸内外场最大超压峰值与油气混合物体积的关系

Figure 9. Relationship between the maximum overpressure peak in the internal and external field of gasoline-air mixture explosion and the volume of gasoline-air mixture

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图 10 油罐外场最大超压峰值分布

Figure 10. Distribution of the maximum overpressure peak in the external field of the tank

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图 11 不同液位外场最大超压峰值与比例距离的关系

Figure 11. Relationship between the maximum overpressure inside the tank and the scaled distance at different liquid levels

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图 12 50%液位油罐油气爆炸内场测点超压时序曲线

Figure 12. Time series curve of overpressure inside tank of gasoline-air mixture explosion at 50% liquid level

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图 13 油气爆炸油罐内场压力传播图

Figure 13. Pressure propagation diagram of gasoline-air mixture explosion inside tank

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图 14 不同液位油气爆炸火焰传播图像

Figure 14. Images of flame propagation of gasoline-air mixture explosion at different liquid levels

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表 1 不同初始体积分数下的油气爆炸内场超压参数

Table 1. Internal field overpressure parameters of gasoline-air mixture explosion at different initial volume fractions

φ_CH/%	p_in,max/kPa	t_in,max/ms	(dp/dt)_in,ave/(MPa·s⁻¹)
0.9	20.37	212	0.10
1.1	26.71	103	0.26
1.4	27.02	70	0.39
1.6	27.86	69	0.40
1.7	31.59	68	0.46
1.8	27.44	90	0.31
2.0	24.67	115	0.22
2.3	22.98	194	0.12
2.6	20.26	462	0.04

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表 2 不同初始体积分数下油气爆炸罐内火焰强度最大峰值和形成时间

Table 2. Maximum peak flame intensity and time of formation in the tank at different initial volume fractions

φ_CH/%	I_max/mV	t_max/ms
0.9	14	483
1.1	69	238
1.4	190	175
1.6	137	184
1.7	107	188
1.8	70	238
2.0	97	313
2.3	162	485
2.6	161	798

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表 3 不同点火位置的油气爆炸超压参数

Table 3. Overpressure parameters of gasoline-air mixture explosion at different ignition locations

点火位置	p_in,max/kPa	t_in,max/ms	(dp/dt)_in,ave/(MPa·s⁻¹)	p_ext,max /kPa	t_ext,max/ms	(dp/dt)_ext,ave/(MPa·s⁻¹)
上部点火	21.91	64	0.34	0.18	5	0.04
中部点火	22.60	64	0.35	0.27	9	0.03
下部点火	26.22	65	0.40	0.37	12	0.03
底部点火	31.59	68	0.47	0.53	10	0.05

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表 4 不同液位下不同初始体积分数油气爆炸内外场最大超压峰值

Table 4. The maximum overpressure peak in the internal and external field of gasoline-air mixture explosion with different initial volume fraction at different liquid levels

φ_CH/%	75%液位		100%液位
φ_CH/%	p_{in, max}/kPa	p_{ext, max} /kPa	p_{in, max}/kPa	p_{ext, max} /kPa
0.9	19.70	0.11	19.88	0.05
1.1	20.95	0.12	20.76	0.09
1.4	22.94	0.17	20.91	0.09
1.6	23.29	0.18	21.41	0.16
1.7	24.02	0.22	22.47	0.18
1.8	23.89	0.20	21.08	0.15
2.0	22.39	0.19	20.63	0.09
2.3	22.55	0.15	20.15	0.07
2.6	19.95	0.13	20.16	0.03

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表 5 不同液位油气爆炸内场超压参数

Table 5. Overpressure parameters inside tank of gasoline-air mixture explosion at different liquid levels

液位/%	p_in,max/kPa	t_in,max/ms	(dp/dt)_in,ave/(MPa·s⁻¹)
0	21.91	64	0.34
25	23.30	63	0.37
50	25.40	59	0.43
75	24.02	56	0.43
100	22.47	53	0.42

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