主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (12): 1707-1710.

• •    下一篇

管道内预混气体爆炸的波形演化特征及超压预测模型

朱传杰1，孙豫敏2，林柏泉1，江丙友3   

  1. (1. 中国矿业大学 安全工程学院, 江苏 徐州 221116; 2. 深圳市福田区应急管理局,广东 深圳518017;3. 安徽理工大学 安全科学与工程学院,安徽 淮南232001)
  • 出版日期:2021-12-15 发布日期:2021-12-15
  • 作者简介:朱传杰（1982-），男，山东日照人，中国矿业大学安全工程学院教授，主要从事气体与粉尘爆炸方面的科研工作，江苏省徐州市大学路88号国基城邦30号楼，221000。
  • 基金资助:
    国家自然科学基金项目（51874293）

Waveform evolution characteristics and overpressure prediction model of premixed gas explosion in pipelines

ZHU Chuan-jie1, SUN Yu-min2, LIN Bai-quan1, JIANG Bing-you3   

  1. (1. Faculty of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China; 2. Emergency Management Bureau of Futian District，Shenzhen Municipality, Guangdong Shenzhen 518055, China; 3. Faculty of Safety Science and Engineering, Anhui University of Science & Technology, Anhui Huainan 232001, China)
  • Online:2021-12-15 Published:2021-12-15

摘要： 综合采用数值模拟、理论建模和实验验证方法，开展了平直管道内气体爆炸超压的预测方法研究。研究分析发现：爆炸波可以分为三种类型，即爆轰波、高速爆燃波和缓燃波，而且爆炸波形能够反映火焰燃烧和爆炸超压之间的关系，典型的爆炸波包含前驱冲击波、火焰压缩波和稀疏波三个部分。前驱冲击波的超压随着爆炸的传播不断增大，其与距离的关系可以用线性函数表征，火焰压缩波形成的第二次峰值超压与传播距离的关系也可以用线性函数表征，但其波形可以用指数函数表征。最后，实验验证了本文提出的爆炸波形函数的正确性，其可以很好地预测爆炸超压演化，而且与数值模拟结论基本相同。研究成果可以为管道或巷道内可燃气体爆炸超压预测及破坏评估提供理论依据。

关键词: 气体爆炸, 超压, 爆炸波形, 火焰, 爆炸波

Abstract: Numerical simulation, theoretical modeling, and experimental verification was used comprehensively to study the prediction method of gas explosion overpressure in pipelines. It is found that blast wave can be divided into three types, e.g. detonation wave, high speed deflagrate wave, and slow combustion wave. The blast wave reflects the relationship between flame combustion and explosion overpressure. A typical blast wave consists of three parts: front shock wave, flame compression wave, and rarefaction wave. Overpressure of front shock wave increases as explosion propagation, and its relationship with distance can be well characterized by a linear function. The relationship between secondary peak overpressure of the flame compression wave and the propagation distance can also be fitted by a linear function, but its waveform can be characterized by an exponential function. Finally, experiments verify the correctness of the blast waveform function proposed in this paper, which can well predict the evolution of explosion overpressure. The conclusion is basically the same as the numerical simulation. The research results can provide theoretical basis for prediction and damage assessment of explosion overpressure of combustible gas in pipelines or tunnels.

Key words: gas explosion, overpressure, blast waveform, flame, blast wave