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 ›› 2020, Vol. 39 ›› Issue (7): 893-896.

• •    下一篇

泄漏源间距对多源重气泄漏扩散的影响

曲翔宇1 ，朱红亚2   

  1. （1. 昆明训练总队，云南 昆明 650000；2. 应急管理部天津消防研究所，天津 300381）
  • 收稿日期:2020-02-19 出版日期:2020-07-15 发布日期:2020-07-15
  • 通讯作者: 朱红亚，应急管理部天津消防研究所助理研究员。
  • 作者简介:曲翔宇（1991-），女，吉林吉林人，应急管理部消防救援局昆明训练总队助理工程师，硕士，主要从事消防装备、火灾理论研究，云南省昆明市官渡区阿拉乡小石坝 435 号，650000。
  • 基金资助:
    国家“十三五”重点研发计划资助项目“特种消防产品关键技术研究及应用示范”（2017YFC0806600）;公安部科技强警基础工作专项项目“有毒有害重气多源泄漏演变规律及预测预警技术研究”（2014GABJC048）

Impact on multi-source heavy gas leakage and diffusion of leakage source distance

QU Xiang-yu1, ZHU Hong-ya2   

  1. (1. Fire and Rescue Training Brigade of Kunming of Fire and Rescue Department, Yunnan Kunming 650000, China; 2. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China)
  • Received:2020-02-19 Online:2020-07-15 Published:2020-07-15

摘要： 开展小尺寸多源重气泄漏扩散的实验研究，探究泄漏源间距对多源重气泄漏扩散相互作用的影响，并给出参考临界值。结果表明：不同泄漏源间距的气体浓度随扩散距离的变化基本符合指数衰减函数规律；在泄漏源附近，气体浓度与泄漏源间距呈明显线性关系；当相对孔间距小于 30 时，泄漏源间距增大会降低泄漏源附近的气体浓度，降低气体浓度下降速率，增大气体扩散范围；当相对孔间距大于 30 时，在泄漏源附近基本不能发生混合，气体浓度衰减趋势不能满足指数衰减公式，可视为 2 个单源重气泄漏。

关键词: 重气, 多源泄漏, 泄漏源间距, 气体浓度

Abstract:

A small scales experimental study on multi- source leakage and diffusion of heavy gas has been developed, and the effects for the multi- source heavy gas leakage of the leakage source distance have been considered with a reference critical value. The results show that with various leakage source distance, the law of gas concentration changing with the diffusion distance basically conforms with the exponential decay function. A linear relationship shows between the gas concentration and the leakage source distance near the sources. When the aperture ratio is less than 30, the
concentration of gas near the sources decreases, the concentration decreasing rate reduces and the gas diffusion range increases with the leakage source distance increases. When the aperture ratio is more than 30, there is no mixing near the leakage source, and the attenuation trend of gas concentration cannot fit the exponential decay function, and it can be considered as two single source leakage of heavy gas.

Key words: dense gas, multi- source leakage, the leakage source distance, concentration of gas

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