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首页> 外文期刊>Journal of Hazardous Materials >Large eddy simulation and experimental study on vented gasoline-air mixture explosions in a semi-confined obstructed pipe
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Large eddy simulation and experimental study on vented gasoline-air mixture explosions in a semi-confined obstructed pipe

机译：半封闭障碍物管道中油气混合气爆炸的大涡模拟与实验研究

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摘要

In this work, LES simulation coupled with a TFC sub-grid combustion model has been performed in a semi-confined pipe (L/D= 10, V=10 L) in the presence of four hollow-square obstacles (BR=49.8%) with circular hollow cross-section, in order to study the premixed gasoline-air mixture explosions. The comparisons between simulated results and experimental results have been conducted. It was found that the simulated results were in good agreement with experimental data in terms of flame structures, flame locations and overpressure time histories. Moreover, the interaction between flame propagation process and obstacles, overpressure dynamics were analyzed. In addition, the effects of initial gasoline vapor concentration (lean (phi=1.3%), stoichiometric (phi=1.7%) and rich (phi=2.1%)), and the number of obstacles (from 1 to 4) were also investigated by experiments. Some of the experimental results have been compared with the literature data. It is found that the explosion parameters of gasoline-air mixtures (e.g. the maximum overpressure peaks, average overpressure growth rates, etc.) are different from some other fuels such as hydrogen, methane and LPG, etc. (C) 2017 Published by Elsevier B.V.
机译：在这项工作中，在有四个空心方形障碍物（BR = 49.8％）的情况下，在半封闭管道（L / D = 10，V = 10 L）中进行了LES模拟和TFC子网格燃烧模型。 ）的圆形空心截面，以研究预混合的汽油-空气混合物爆炸。进行了模拟结果和实验结果之间的比较。发现在火焰结构，火焰位置​​和超压时间历史方面，模拟结果与实验数据吻合良好。此外，分析了火焰传播过程与障碍物之间的相互作用，超压动力学。此外，还研究了初始汽油蒸气浓度（稀（phi = 1.3％），化学计量比（phi = 1.7％）和浓（phi = 2.1％））和障碍物数量（1至4）的影响。通过实验。一些实验结果已经与文献数据进行了比较。发现汽油-空气混合物的爆炸参数（例如最大超压峰值，平均超压增长率等）与某些其他燃料（例如氢气，甲烷和LPG等）不同。（C）2017由爱思唯尔（Elsevier）发布BV

著录项

  • 来源
    《Journal of Hazardous Materials》 |2017年第5期|131-142|共12页
  • 作者

    Li Guoqing; Du Yang; Wang Shimao; Qi Sheng; Zhang Peili; Chen Wenzhuo;

  • 作者单位

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

    Logist Engn Univ, Chongqing Key Lab Fire & Explos Safety, Chongqing 401311, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Vented gasoline-air mixture explosions; Large eddy simulation; Obstacles;

    机译：通风的汽油-空气混合物爆炸;大涡模拟;障碍物;

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