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 ›› 2023, Vol. 42 ›› Issue (9): 1210-1216.

• • 上一篇    下一篇

气-液两相二甲醚喷射火焰燃烧行为的数值模拟

郈植皓1,2,3, 毕明树1,2,3, 郝强强1,2,3, 任婧杰1,2,3   

  1. （1. 精细化工国家重点实验室,辽宁 大连116024；2. 智能材料化工前沿科学中心,辽宁 大连116024；3. 大连理工大学 化工学院，辽宁 大连 116024）
  • 出版日期:2023-09-15 发布日期:2023-09-15
  • 作者简介:郈植皓(1996- )，男，新疆昌吉人，大连理工大学化工学院硕士研究生，主要从事喷射火灾方面的研究，辽宁省大连市甘井子区凌工路2号，116024。
  • 基金资助:
    国家自然科学基金重点项目（52130410）；中央高校基本科研业务费专项资助项目（DUT22LAB604）；火灾科学国家重点实验室开放课题（HZ2018-KF13）

Numerical simulation of the combustion behavior of gas-liquid two-phase dimethyl ether jet flame

Hou Zhihao1,2,3, Bi Mingshu1,2,3, Hao Qiangqiang1,2,3, Ren Jingjie1,2,3   

  1. (1.Frontier Science Center for Smart Materials, Liaoning Dalian 116024, China; 2.State Key Laboratory of Fine Chemicals, Liaoning Dalian 116024, China; 3. School of Chemical Engineering, Dalian University of Technology, Liaoning Dalian 116024, China)
  • Online:2023-09-15 Published:2023-09-15

摘要： 本文采用数值模拟方法，基于欧拉-拉格朗日体系，建立了气-液两相燃烧的数值计算模型，研究了不同喷嘴直径和喷射压力对气-液两相二甲醚喷射火焰的火焰形态、液滴分布特性和热辐射危害范围的影响。结果表明：喷射压力越大、喷嘴直径越大，火焰长度越长；喷射压力和喷嘴直径增加时，液滴蒸发强度增加，近喷嘴区域液滴平均粒径与速度上升；火焰下游处与火焰侧面最大热辐射危害范围分别为9.5 m和5.0 m。

关键词: 二甲醚, 气-液两相喷射火焰, 数值模拟, 火焰形态, 热辐射危害范围

Abstract:  In order to analyze the combustion behavior and hazard range of gas-liquid two-phase jet flame produced by liquid hazardous chemicals tank leakage, a numerical calculation model of gas-liquid two-phase combustion was established based on Euler-Lagrange system by numerical simulation method. the effects of different nozzle diameter and injection pressure on the flame shape, droplet distribution and thermal radiation hazard range of gas-liquid two-phase dimethyl ether injection flame were studied. The results show that the higher the injection pressure and the larger the diameter of the nozzle, the longer the flame length, and the predictive correlation between mass flow rate and flame length is proposed. With the increase of injection pressure and nozzle diameter, the droplet evaporation intensity increases, and the average droplet size and velocity near the nozzle increase. The maximum thermal radiation hazard range of downstream and side of flame is 9.5 m and 5 m respectively.

Key words: Key words: dimethyl ether, gas-liquid two-phase jet flame, numerical simulation, flame form, thermal radiation hazard range