An experimental study on ignition and explosion of high-pressure hydrogen jet in open space

MA Mengfei; YU Xing; ZHANG Aifeng; ZHANG Jiaqing; ZHU Xianli; WANG Changjian

doi:10.11883/bzycj-2023-0037

Volume 44 Issue 6

Jun. 2024

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MA Mengfei, YU Xing, ZHANG Aifeng, ZHANG Jiaqing, ZHU Xianli, WANG Changjian. An experimental study on ignition and explosion of high-pressure hydrogen jet in open space[J]. Explosion And Shock Waves, 2024, 44(6): 062101. doi: 10.11883/bzycj-2023-0037

Citation:

MA Mengfei, YU Xing, ZHANG Aifeng, ZHANG Jiaqing, ZHU Xianli, WANG Changjian. An experimental study on ignition and explosion of high-pressure hydrogen jet in open space[J]. Explosion And Shock Waves, 2024, 44(6): 062101. doi: 10.11883/bzycj-2023-0037

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An experimental study on ignition and explosion of high-pressure hydrogen jet in open space

doi: 10.11883/bzycj-2023-0037

MA Mengfei^{1, 2
,},
YU Xing^{1, 2},
ZHANG Aifeng^{1, 2},
ZHANG Jiaqing^{3, 4},
ZHU Xianli^{3, 4},
WANG Changjian^{1, 5
,
,}

1.
School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
2.
Anhui International Joint Research Center on Hydrogen Safety, Hefei 230009, Anhui, China
3.
State Grid Anhui Electric Power Research Institute, Hefei 230088, Anhui, China
4.
Anhui Province Key Laboratory for Electric Fire and Safety Protection, Hefei 230088, Anhui, China
5.
Engineering Research Center of Safety Critical Industrial Measurement and Control Technology, Ministry of Education, Hefei 230009, Anhui, China

Received Date: 2023-02-10
Rev Recd Date: 2024-01-03

Available Online: 2024-06-18

Publish Date: 2024-06-18

Abstract

Abstract

Experiments were carried out on the flame behaviors and overpressure evolutions at the initial stage of ignition and explosion of steady-state hydrogen jet in open space, while a high-speed camera and pressure transducers were employed to record the flame shape and overpressure. The results show that at the early stage of ignition and explosion, the flame propagated outward from the ignition electrode with a spherical shape. After 4-6 ms, the flame front reached its maximum displacement, gradually extinguished, and finally formed a jet flame. The displacement of the flame front was mainly affected by the nozzle diameter and increased with the nozzle diameter. The variations of flame width were basically similar to those of the flame front displacement. The entire explosion process only experienced one overpressure peak, with a positive pressure maintained for approximately 1 ms. At the same ignition distance, the peak overpressure increased with hydrogen flow rate. At the same hydrogen flow rate, the peak overpressure decreased with increasing ignition distance. The maximum peak overpressure was directly proportional to the hydrogen flow rate and inversely proportional to the ignition distance.
- hydrogen explosion,
- flame front displacement,
- flame width,
- maximum peak overpressure

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References(25)

References

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