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

CAI Yunxiong; JIANG Xinsheng; WANG Shimao; YU Binbin; WANG Zituo; WANG Chunhui; LI Yuxi

doi:10.11883/bzycj-2022-0012

Volume 42 Issue 10

Oct. 2022

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CAI Yunxiong, JIANG Xinsheng, WANG Shimao, YU Binbin, WANG Zituo, WANG Chunhui, LI Yuxi. Experimental study of gasoline-air mixture explosion in imitated vertical dome oil tank[J]. Explosion And Shock Waves, 2022, 42(10): 105401. doi: 10.11883/bzycj-2022-0012

Citation:

CAI Yunxiong, JIANG Xinsheng, WANG Shimao, YU Binbin, WANG Zituo, WANG Chunhui, LI Yuxi. Experimental study of gasoline-air mixture explosion in imitated vertical dome oil tank[J]. Explosion And Shock Waves, 2022, 42(10): 105401. doi: 10.11883/bzycj-2022-0012

Citation:

CAI Yunxiong, JIANG Xinsheng, WANG Shimao, YU Binbin, WANG Zituo, WANG Chunhui, LI Yuxi. Experimental study of gasoline-air mixture explosion in imitated vertical dome oil tank[J]. Explosion And Shock Waves, 2022, 42(10): 105401. doi: 10.11883/bzycj-2022-0012

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

doi: 10.11883/bzycj-2022-0012

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

Received Date: 2022-01-10
Rev Recd Date: 2022-03-03

Available Online: 2022-03-29

Publish Date: 2022-10-31

Abstract

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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References

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