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Experimental and Numerical Study on the Explosion Dynamics of the Non-Uniform Liquefied Petroleum Gas and Air Mixture in a Channel with Mixed Obstacles

Author

Listed:
  • Bingang Guo

    (School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China)

  • Jianfeng Gao

    (School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China
    National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhoushan 316022, China
    Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China)

  • Bin Hao

    (School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China)

  • Bingjian Ai

    (School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China)

  • Bingyuan Hong

    (School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China
    National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhoushan 316022, China
    Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China)

  • Xinsheng Jiang

    (Department of Oil, Army Logistical University, Chongqing 401331, China)

Abstract

Mixed obstacles have a great influence on the deflagration process of liquefied petroleum gas (LPG)-air premixed combustible gas with concentration gradient. The arrangement of mixed obstacles may further stimulate overpressure and flame propagation. In this work, based on experimental and numerical simulations, this paper analyzes the flame and overpressure, and mainly studies the coupling relationship among the explosion overpressure characteristics, the structure of flame and the speed of flame propagation. The result shows that when the rectangular obstacle is 100 mm away from the ignition source, not only the speed of flame is the fastest, but also the time required to reach the maximum over-pressure is the shortest. In this configuration, an elongated flame is formed between a rectangular obstacle and a flat obstacle, and an obvious backflow structure appears. In addition, the average growth rate of overpressure has a minimum value, reaching at −35 MPa/s. The existence of rectangular obstacles further stimulates the overpressure. When the rectangular obstacle is 400 mm away from the ignition source, the maximum overpressure value is the highest among the four configurations. Besides, the time when the maximum area of flame appears in the simulation is almost the same as the time when the maximum overpressure is obtained. In addition, the average growth rate of overpressure increases significantly after touching the rectangular obstacle, which coincides with the mutation time of the front tip of the flame, overpressure and area of flame after the flame encounters the rectangular obstacle. This research has an important theoretical guiding significance for preventing LPG leakage and explosion accidents in a long and narrow space.

Suggested Citation

  • Bingang Guo & Jianfeng Gao & Bin Hao & Bingjian Ai & Bingyuan Hong & Xinsheng Jiang, 2022. "Experimental and Numerical Study on the Explosion Dynamics of the Non-Uniform Liquefied Petroleum Gas and Air Mixture in a Channel with Mixed Obstacles," Energies, MDPI, vol. 15(21), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7999-:d:955517
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    References listed on IDEAS

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    1. Shen, Xiaobo & Zhang, Chao & Xiu, Guangli & Zhu, Hongya, 2019. "Evolution of premixed stoichiometric hydrogen/air flame in a closed duct," Energy, Elsevier, vol. 176(C), pages 265-271.
    2. Jian Guo & Jun Wang & Baikang Zhu & Bingyuan Hong & Cuicui Li & Jianhui He, 2022. "A Risk Evaluation Method of Coastal Oil Depots for Heavy Rainfall Vulnerability Assessment," Sustainability, MDPI, vol. 14(11), pages 1-12, June.
    3. Wojciech Rudy & Andrzej Teodorczyk, 2020. "Numerical Simulations of DDT Limits in Hydrogen-Air Mixtures in Obstacle Laden Channel," Energies, MDPI, vol. 14(1), pages 1-19, December.
    4. Zheng, Kai & Wu, Qifen & Chen, Chuandong & Xing, Zhixiang & Hao, Yongmei & Yu, Minggao, 2022. "Explosion behavior of non-uniform methane/air mixture in an obstructed duct with different blockage ratios," Energy, Elsevier, vol. 255(C).
    5. Guiliang Li & Bingyuan Hong & Haoran Hu & Bowen Shao & Wei Jiang & Cuicui Li & Jian Guo, 2022. "Risk Management of Island Petrochemical Park: Accident Early Warning Model Based on Artificial Neural Network," Energies, MDPI, vol. 15(9), pages 1-13, April.
    6. Luo, Zhenmin & Kang, Xiaofeng & Wang, Tao & Su, Bin & Cheng, Fangming & Deng, Jun, 2021. "Effects of an obstacle on the deflagration behavior of premixed liquefied petroleum gas-air mixtures in a closed duct," Energy, Elsevier, vol. 234(C).
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    Cited by:

    1. Sergey Yakush & Oleg Semenov & Maxim Alexeev, 2023. "Premixed Propane–Air Flame Propagation in a Narrow Channel with Obstacles," Energies, MDPI, vol. 16(3), pages 1-19, February.

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