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An experimental study on the detonation transmission behaviours in acetylene-oxygen-argon mixtures

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  • Wu, Yuwen
  • Zheng, Quan
  • Weng, Chunsheng

Abstract

Accidental explosions/detonations preventions and control are practical as well as scientific issues. Although numerous research have been carried out to examine the combustion characteristics in acetylene mixtures, very limited studies focused on detonation transmission behaviours in a finite expansion space, which is of vital importance for the explosion safety assessment. This paper reports the detonation transmission behaviours through a confined sudden expansion in stoichiometric acetylene-oxygen mixtures diluted with varying amount of argon. Detonation velocity measurement and soot film visualization were used to characterize the detonation behaviour. The experimental results indicate that the initial over-driven degree of re-initiated detonation decreases with the increase of argon dilution in the expanded tube. Two transmission modes with distinct detonation cellular structures are experimentally observed. For the large expansion ratio, localized explosions followed by fine-scale detonation structures are observed in the expanded tube. As the initial pressure approaches the limiting transmission pressure, the re-initiation distance remarkably increases. For the small expansion, the near-limit detonation waves are observed to transmit to the expanded tube successfully without detonation re-initiation. A dimensionless cell size Λ is introduced to correlate with the re-initiation distance of transmitted detonation in acetylene-oxygen-argon mixtures, and a unified curve can be obtained.

Suggested Citation

  • Wu, Yuwen & Zheng, Quan & Weng, Chunsheng, 2018. "An experimental study on the detonation transmission behaviours in acetylene-oxygen-argon mixtures," Energy, Elsevier, vol. 143(C), pages 554-561.
    • Handle: RePEc:eee:energy:v:143:y:2018:i:c:p:554-561
    DOI: 10.1016/j.energy.2017.11.019
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    References listed on IDEAS

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    1. Lakshmanan, T. & Nagarajan, G., 2010. "Experimental investigation of timed manifold injection of acetylene in direct injection diesel engine in dual fuel mode," Energy, Elsevier, vol. 35(8), pages 3172-3178.
    2. Lakshmanan, T. & Nagarajan, G., 2011. "Study on using acetylene in dual fuel mode with exhaust gas recirculation," Energy, Elsevier, vol. 36(5), pages 3547-3553.
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    Cited by:

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    2. Wang, Wentao & Cheng, Yangfan & Wang, Rui & Wang, Hao & Wang, Quan & Liu, Rong & Ma, Honghao, 2022. "Flame behaviors and overpressure characteristics of the unconfined acetylene-air deflagration," Energy, Elsevier, vol. 246(C).
    3. Zhang, Qibin & Wang, Ke & Dong, Rongxiao & Fan, Wei & Lu, Wei & Wang, Yongjia, 2019. "Experimental research on propulsive performance of the pulse detonation rocket engine with a fluidic nozzle," Energy, Elsevier, vol. 166(C), pages 1267-1275.
    4. Sun, Xuxu & Lu, Shouxiang, 2020. "Effect of obstacle thickness on the propagation mechanisms of a detonation wave," Energy, Elsevier, vol. 198(C).
    5. Liu, Lijuan & Zhang, Qi, 2019. "Flame range and energy output in two-phase propylene oxide/air mixtures beyond the original premixed zone," Energy, Elsevier, vol. 171(C), pages 666-677.
    6. Shida Xu & Feilong Song & Jianping Zhou & Xingkui Yang & Peng Cheng, 2022. "Experimental Study on Propagation Characteristics of Kerosene/Air RDE with Different Diameters," Energies, MDPI, vol. 15(12), pages 1-13, June.

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