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 (8): 1169-1173.

• • 上一篇    下一篇

丙烷-空气预混火焰在三角形狭缝内传播特性

孙 昱1，崔晋恺1，苏永升1，钭丽敏2   

  1. 1.华东理工大学 机械与动力工程学院，上海200237；2.上海华理安全设备有限公司，上海200237
  • 出版日期:2021-08-15 发布日期:2021-08-15
  • 通讯作者: 苏永升（1962-），男，华东理工大学动力与工程学院教授。
  • 作者简介:孙 昱（1994-），男，华东理工大学动力与工程学院研究生，主要从事CFD数值模拟研究，上海市徐汇区梅陇路130号，200237。

Propagation characteristics of propane-air premixed flame in slots

SUN Yu1, CUI Jin-kai1, SU Yong-sheng1,  DOU Li-min2   

  1. 1. College of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China; 2. Shanghai Huali Safety Equipment Co., Ltd., Shanghai 200237, China
  • Online:2021-08-15 Published:2021-08-15

摘要：

用计算流体力学方法对以丙烷为燃料的预混火焰进行数值模拟。研究预混火焰在等边三角形狭缝中传播时，狭缝尺寸、壁面初温、火焰初速对火焰淬熄长度的影响，并拟合火焰淬熄长度的计算公式。结果表明：狭缝尺寸、壁面初温以及火焰初速3个因素均与淬熄长度呈正相关。随着火焰初速的变快，淬熄长度增加放缓。在较高的火焰初速下，狭缝尺寸是影响淬熄长度的主要因素。拟合了较准确的淬熄长度计算公式。

关键词: 波纹型阻火器, 火焰淬熄, 预混火焰, 数值模拟, 狭缝

Abstract:

The premixed flame fueled with propane was simulated by computational fluid dynamics. The effects of slit size, initial wall temperature and initial flame velocity on the quenching length are studied when premixed flame propagates in an equilateral triangular slit, and fitting calculation formula of quenching length is gotten. The results show that the size of the slit, the initial temperature of the wall and the initial velocity of the flame are positively correlated with the quenching length. With the increase of flame initial velocity, quenching length increases slowly. At higher initial flame velocity, the size of the slit is the main factor affecting the quenching length. According to simulate data, a more accurate formula for quenching length calculation is fitted.

Key words:

crimped ribbon flame arrester, flame quenching, premixed flame, numerical simulation, narrow channel