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

Fire Science and Technology ›› 2023, Vol. 42 ›› Issue (9): 1210-1216.

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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

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