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 (2): 172-174.

• • 上一篇    下一篇

微通道内预混乙烯-空气火焰传播和流通特性

鲍磊1,2，王鹏1,2，于安峰1,2，赵明皇3，罗翔鹏3   

  1. 1. 中国石油化工股份有限公司青岛安全工程研究院，山东青岛266000；2. 化学品安全控制国家重点实验室，山东青岛266000；3. 北京化工大学机电工程学院，北京100029

  • 出版日期:2021-02-15 发布日期:2021-02-15
  • 作者简介:鲍磊（1987-），男，中国石油化工股份有限公司青岛安全工程研究院高级工程师，主要从事天然气安全、BOG 回收等方面的研究，山东省青岛市崂山区松岭路339 号，266000。
  • 基金资助:
    中国石油化工股份有限公司技术开发项目（318021）

Characteristics of premixed ethylene-air flame propagation and flow characteristics in micro-channels

BAO Lei1,2, WANG Peng1,2, YU An-feng1,2, ZHAO Ming-huang3, LUO Xiang-peng3   

  1. 1.SINOPEC Research Institute of Safety Engineering, Shandong Qingdao 266000, China; 2.State Key laboratory of Safety Control for Chemicals, Shandong Qingdao 266000, China; 3. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Online:2021-02-15 Published:2021-02-15

摘要： 基于Fluent 软件，对乙烯-空气预混火焰在四种不同狭缝管道阻火器中的传播以及正常情况下乙烯-空气预混气体通过每种狭缝阻火器的压力降进行了数值模拟研究，对比分析了不同狭缝管道阻火器的阻火性能，并以微圆狭缝为例，分析了狭缝内火焰传播特性。模拟结果表明，火焰在微圆狭缝传播过程中呈现“指尖”状，会发生滞留现象，随后沿着狭缝轴线方向继续向前传播，但在平板狭缝、三角形狭缝和菱形狭缝内未发生此现象。对于微圆狭缝，厚度为100 mm 的阻火单元也无法阻火；对于平板狭缝或三角形狭缝，厚度为30 mm 的阻火单元可成功阻火；对于菱形狭缝，厚度为10 mm 的阻火单元便可成功阻火。在成功阻火且阻火单元数相同的情况下，平板狭缝压力损失最小，菱形狭缝压力损失远大于三角形狭缝和平板狭缝。

关键词: 微通道火焰, 乙烯-空气, 火焰传播特性, 阻火器

Abstract:

Based on Fluent software, the ethylene/air premixed flame state in four different slit duct propagation of flame arrester and the pressure drop of each slit flame arrester under normal conditions were simulated. The flame inhibition performance of four different slit in-line flame arrester was comprised and analyzed. The slit flame propagation characteristics were analyzed with round slit as a case. The simulation results show that the flame shows a "fingertip" shape during the propagation of the micro-circular slit, will be detained and then continues to travel forward along the axis of the slit, but this phenomenon does not occur in the plate slit, triangle slit and diamond slit. For the round slit, the flame resistance unit with a thickness of 100 mm cannot prevent flame. For plate slit or triangular slit, flame resistance unit with thickness of 30 mm can successfully resist flame. For the diamond-shaped slit, flame resistance unit with a thickness of 10 mm can successfully prevent flame. Under the condition of successful flame resistance and the same number of flame resistance units, the pressure loss of the plate slit is the minimum, and the pressure loss of the diamond slit is much greater than that of the triangle slit and the plate slit. 

Key words:  micro channel flame, ethylene- air, flame propagation characteristics, flame arrester