丙烷-空气预混火焰在三角形狭缝内传播特性  

Propagation characteristics of propane-air premixed flame in slots

作　　者：孙昱 崔晋恺 苏永升[1] 钭丽敏 SUN Yu;CUI Jin-kai;SU Yong-sheng;DOU Li-min(College of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Huali Safety Equipment Co.,Ltd.,Shanghai 200237,China)

机构地区：[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　　处：《消防科学与技术》2021年第8期1169-1173,共5页Fire Science and Technology

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。The premixed flame fueled with propane was simulat-ed by computational fluid dynamics.The effects of slit size,ini-tial wall temperature and initial flame velocity on the quenching length are studied when premixed flame propagates in an equi-lateral triangular slit,and fitting calculation formula of quench-ing 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 simu-late data,a more accurate formula for quenching length calcula-tion is fitted.

关 键 词：波纹型阻火器 火焰淬熄 预混火焰 数值模拟 狭缝 

分 类 号：X932[环境科学与工程—安全科学]