Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire

YAN Weiyang; PAN Xuhai; WANG Zhilei; HUA Min; JIANG Yiming; WANG Qingyuan; JIANG Juncheng

doi:10.11883/bzycj-2018-0394

Volume 39 Issue 11

Nov. 2019

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YAN Weiyang, PAN Xuhai, WANG Zhilei, HUA Min, JIANG Yiming, WANG Qingyuan, JIANG Juncheng. Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire[J]. Explosion And Shock Waves, 2019, 39(11): 115402. doi: 10.11883/bzycj-2018-0394

Citation:

YAN Weiyang, PAN Xuhai, WANG Zhilei, HUA Min, JIANG Yiming, WANG Qingyuan, JIANG Juncheng. Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire[J]. Explosion And Shock Waves, 2019, 39(11): 115402. doi: 10.11883/bzycj-2018-0394

Citation:

YAN Weiyang, PAN Xuhai, WANG Zhilei, HUA Min, JIANG Yiming, WANG Qingyuan, JIANG Juncheng. Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire[J]. Explosion And Shock Waves, 2019, 39(11): 115402. doi: 10.11883/bzycj-2018-0394

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Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire

doi: 10.11883/bzycj-2018-0394

YAN Weiyang^1
,,
PAN Xuhai^{1, 2
,
,},
WANG Zhilei¹,
HUA Min^{1, 2},
JIANG Yiming¹,
WANG Qingyuan¹,
JIANG Juncheng^{1, 2}

1.
College of Safety Science and Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China
2.
Jiangsu Key Laboratory of Intrinsic Safety and Control of Hazardous Chemicals, Nanjing Tech University, Nanjing 210009, Jiangsu, China

Received Date: 2018-10-16
Rev Recd Date: 2019-02-12
Publish Date: 2019-11-01

Abstract

Abstract

In this paper, to investigate the variation of the critical initial release pressure with the pipeline length in high-pressure hydrogen leakage that leads to spontaneous combustion and the transition process from spontaneous combustion flame inside the tube to the jet flame outside the tube, we conducted experiments using a pressure gauge, a photoelectric and high-speed camera, etc. Our results showed that, at the same pipeline length and under a low initial release pressure, hydrogen is not apt to spontaneous combustion. The minimum initial release pressure of hydrogen spontaneous combustion decreases slowly and then increases rapidly with as the pipe length increases. At the same pipeline length, the greater the initial release pressure, the faster the shock wave propagation, and the closer the hydrogen self-ignition position inside the pipe to the rupture disc. It is found that the flame combustion is intensified after the airflow passed through the Mach disk. With the increase of time, the flame length increases first and then decreases gradually, the average propagation speed of the jet flame tip decreases gradually. The flame width increases first and then decreases rapidly to a stable value.
- hydrogen,
- spontaneous combustion,
- pipeline,
- shock wave,
- jet fire

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References(22)

References

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