Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width

Zhang Penggang; Zhu Yuejin; Pan Zhenhua; Wang Qian

doi:10.11883/1001-1455(2016)04-0441-08

Volume 36 Issue 4

Oct. 2018

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Zhang Penggang, Zhu Yuejin, Pan Zhenhua, Wang Qian. Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width[J]. Explosion And Shock Waves, 2016, 36(4): 441-448. doi: 10.11883/1001-1455(2016)04-0441-08

Citation:

Zhang Penggang, Zhu Yuejin, Pan Zhenhua, Wang Qian. Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width[J]. Explosion And Shock Waves, 2016, 36(4): 441-448. doi: 10.11883/1001-1455(2016)04-0441-08

Citation:

Zhang Penggang, Zhu Yuejin, Pan Zhenhua, Wang Qian. Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width[J]. Explosion And Shock Waves, 2016, 36(4): 441-448. doi: 10.11883/1001-1455(2016)04-0441-08

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Effects of initial pressure and gap width on detonation initiation distance in a narrow gap with millimeter-scale width

doi: 10.11883/1001-1455(2016)04-0441-08

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

Received Date: 2015-01-09
Rev Recd Date: 2015-04-16
Publish Date: 2016-07-25

Abstract

Abstract

The detonation initiation distance for stoichiometric C₂H₄/O₂ mixture gas in a narrow gap was experimentally studied at the initial pressure of 5.0-50.0 kPa. The channels were formed by the 10, 20, 30 mm×1.0 mm cross-sections and 1 220 mm long, respectively. the initiation positions were determined by the soot records and the high-speed digital imagings. The influence of initial pressure and gap width on detonation initiation distance was analyzed. The results indicate that: (1) initiation distance decreases with the increase of gap width at the initial pressure of 21.0-30.0 kPa; (2) with the increase of gap width, initiation distance initially decreases and then increases at the initial pressure of 35.0-42.5 kPa, and remains unchanged at the initial pressure of 45.0-50.0 kPa; (3) the non-dimensional change curves between detonation initiation distance and initial pressure are different corresponding to the three different gap widths.
- mechanics of explosion,
- initiation distance,
- soot records,
- micro-detonation,
- micro-combustion,
- narrow gap

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References(19)

References

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