Investigation of the propagation modes for gaseous detonation at near-limit condition

YAN Bingjian; ZHANG Bo; GAO Yuan; LYU Shuguang

doi:10.11883/bzycj-2017-0167

Volume 38 Issue 6

Sep. 2018

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YAN Bingjian, ZHANG Bo, GAO Yuan, LYU Shuguang. Investigation of the propagation modes for gaseous detonation at near-limit condition[J]. Explosion And Shock Waves, 2018, 38(6): 1435-1440. doi: 10.11883/bzycj-2017-0167

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YAN Bingjian, ZHANG Bo, GAO Yuan, LYU Shuguang. Investigation of the propagation modes for gaseous detonation at near-limit condition[J]. Explosion And Shock Waves, 2018, 38(6): 1435-1440. doi: 10.11883/bzycj-2017-0167

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Investigation of the propagation modes for gaseous detonation at near-limit condition

doi: 10.11883/bzycj-2017-0167

1.
School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
2.
School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
3.
Department of Mechanical and Aerospace Engineering, West Virginia University, United States

Received Date: 2017-05-11
Rev Recd Date: 2017-08-31
Publish Date: 2018-11-25

Abstract

Abstract

In this paper, five kinds of hydrocarbon gaseous mixture were selected as working medium. By using high voltage spark ignition method and optical fiber probe, the propagation velocity of detonation wave in pipeline was measured near failure state condition. Experiments were conducted based on a self-made detonation pipeline, which includes a drive section and three different test sections with 1.5-mm, 3.2-mm and 12.7-mm inner diameter, respectively. Experimental results reverified that there are six different propagation modes, which are steady detonation, rapid fluctuation detonation, stuttering detonation, galloping detonation, low velocity detonation and detonation failure, respectively for pipeline detonation. Among them, gaseous mixtures C₂H₂+2.5O₂+70%Ar and C₂H₂+2.5O₂+85%Ar (both have low activation energy), have only three propagating modes, i.e. steady, rapid fluctuation and failure modes; while for other three gaseous mixtures C₃H₈+5O₂, C₂H₂+5N₂O and CH₄+2O₂ (with higher activation energy), there are six different propagating modes. The results show that besides gas composition and initial pressure, the activation energy of gaseous mixture may also affect the propagation state of detonation wave in pipeline.
- detonation wave,
- propagation mode,
- velocity fluctuation,
- activation energy

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References(15)

References

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