Effects of hydrogen-blending ratio on detonation characteristics of premixed methane-oxygen gas

NI Jing; PAN Jianfeng; JIANG Chao; CHEN Xiang; ZHANG Shun

doi:10.11883/bzycj-2019-0237

Volume 40 Issue 4

Apr. 2020

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NI Jing, PAN Jianfeng, JIANG Chao, CHEN Xiang, ZHANG Shun. Effects of hydrogen-blending ratio on detonation characteristics of premixed methane-oxygen gas[J]. Explosion And Shock Waves, 2020, 40(4): 042102. doi: 10.11883/bzycj-2019-0237

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NI Jing, PAN Jianfeng, JIANG Chao, CHEN Xiang, ZHANG Shun. Effects of hydrogen-blending ratio on detonation characteristics of premixed methane-oxygen gas[J]. Explosion And Shock Waves, 2020, 40(4): 042102. doi: 10.11883/bzycj-2019-0237

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Effects of hydrogen-blending ratio on detonation characteristics of premixed methane-oxygen gas

doi: 10.11883/bzycj-2019-0237

School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

Received Date: 2019-06-13
Rev Recd Date: 2019-09-30
Publish Date: 2020-04-01

Abstract

Abstract

Hydrogen-doped fuel has gradually become the focus of research due to its excellent combustion characteristics. In order to further study the detonation characteristics of hydrogen-doped fuel, a cylindrical semi-enclosed tube with the length of 3 000 mm and the diameter of 30 mm was designed. The detonation characteristics of three premixed gases, CH₄-2O₂, 6CH₄-H₂-12.5O₂ and 3CH₄-H₂-6.5O₂ (hydrogen ratio is 0%, 5.1% and 9.5%, respectively), were studied experimentally under different initial pressures. Smoked foils, ion probes and pressure sensors were used to measure the cell structures, the flame positions and the internal pressures, respectively. The results show that hydrogen-doped methane/oxygen can effectively increase the propagation velocity of detonation waves, and the higher the concentration of hydrogen, the faster the propagation velocity. In addition, hydrogen can reduce the velocity loss at the outlet of the tube and accelerate the coupling of flame and shock wave at lower initial pressures, reduce the cell size and improve detonation sensitivity.
- detonation wave,
- detonation cell size,
- ratio of mixing hydrogen,
- detonation sensitivity

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References(23)

References

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