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SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 87 ›› Issue (11): 391-404.DOI: 10.1016/j.cjche.2025.05.035

• • 上一篇    下一篇

The inhibition difference and mechanism research of N2-water mist two-phase medium on CH4, LPG and H2 explosion flame acceleration characteristic

Hang Lyu1,2, Bei Pei1,2,3, Lei zhou3, Zhiqi Wu1,2, Chong Jia1,2, Tianxiang Xu1,2, Wentao Ji1,2, Shiliang Li1,2   

  1. 1. State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan 454003, China;
    2. Henan Polytechnic University, Henan 454003, China;
    3. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
  • 收稿日期:2025-02-07 修回日期:2025-04-11 接受日期:2025-05-05 出版日期:2025-11-28 发布日期:2025-07-24
  • 通讯作者: Bei Pei,E-mail:pb128@hpu.edu.cn
  • 基金资助:
    This paper was financially supported by the National Natural Science Foundation of China (52474216 and 52374197), the Science & Technology Innovation Talents in Universities of Henan Province (22HASTIT027) and the Scientific and Technological Key Project of Henan Province (222102320142).

The inhibition difference and mechanism research of N2-water mist two-phase medium on CH4, LPG and H2 explosion flame acceleration characteristic

Hang Lyu1,2, Bei Pei1,2,3, Lei zhou3, Zhiqi Wu1,2, Chong Jia1,2, Tianxiang Xu1,2, Wentao Ji1,2, Shiliang Li1,2   

  1. 1. State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan 454003, China;
    2. Henan Polytechnic University, Henan 454003, China;
    3. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
  • Received:2025-02-07 Revised:2025-04-11 Accepted:2025-05-05 Online:2025-11-28 Published:2025-07-24
  • Contact: Bei Pei,E-mail:pb128@hpu.edu.cn
  • Supported by:
    This paper was financially supported by the National Natural Science Foundation of China (52474216 and 52374197), the Science & Technology Innovation Talents in Universities of Henan Province (22HASTIT027) and the Scientific and Technological Key Project of Henan Province (222102320142).

PDF (PC)

摘要： To address the critical need for safer and cleaner explosion suppression technologies in industrial settings, the suppression differences and mechanisms of the flame acceleration characteristics of CH4, LPG and H2 explosions by N2-water mist two-phase medium were investigated. The flame acceleration characteristics and suppression mechanism of methane, LPG and H2 explosions in N2-water mist two-phase medium were studied qualitatively and quantitatively from both experimental and simulation aspects. The experimental results show that compared with single N2 or water mist, the N2-water mist two-phase medium is more effective in reducing the flame propagation speed and delaying the formation of flame hydrodynamic structure, thus slowing down the flame acceleration characteristics. The simulation results show that this two-phase medium exhibits a strong inhibitory effect on the thermal diffusion instability of CH4 and LPG, and significantly weakens the hydrodynamic instability of CH4, LPG, and H2 simultaneously. Mechanistic analysis confirms that the N2-water mist two-phase medium has both chemical and physical inhibitory effects, among which the physical inhibition plays a dominant role. In addition, the study reveals a linear correlation between the concentration of H radicals in the three combustible gases and the laminar burning velocity. Moreover, this two-phase medium can significantly reduce the reaction rate of the H radical chain reaction, thereby effectively suppressing the laminar burning velocity.

关键词: Gas-liquid two phase, Cellular instability, Inhibition mechanism, Synergistic effect

Abstract: To address the critical need for safer and cleaner explosion suppression technologies in industrial settings, the suppression differences and mechanisms of the flame acceleration characteristics of CH4, LPG and H2 explosions by N2-water mist two-phase medium were investigated. The flame acceleration characteristics and suppression mechanism of methane, LPG and H2 explosions in N2-water mist two-phase medium were studied qualitatively and quantitatively from both experimental and simulation aspects. The experimental results show that compared with single N2 or water mist, the N2-water mist two-phase medium is more effective in reducing the flame propagation speed and delaying the formation of flame hydrodynamic structure, thus slowing down the flame acceleration characteristics. The simulation results show that this two-phase medium exhibits a strong inhibitory effect on the thermal diffusion instability of CH4 and LPG, and significantly weakens the hydrodynamic instability of CH4, LPG, and H2 simultaneously. Mechanistic analysis confirms that the N2-water mist two-phase medium has both chemical and physical inhibitory effects, among which the physical inhibition plays a dominant role. In addition, the study reveals a linear correlation between the concentration of H radicals in the three combustible gases and the laminar burning velocity. Moreover, this two-phase medium can significantly reduce the reaction rate of the H radical chain reaction, thereby effectively suppressing the laminar burning velocity.

Key words: Gas-liquid two phase, Cellular instability, Inhibition mechanism, Synergistic effect

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