|本期目录/Table of Contents|

[1]程方明,常助川,史合,等.金属丝网对甲烷/空气预混火焰管道内传播的影响[J].中国安全生产科学技术,2020,16(1):135-140.[doi:10.11731/j.issn.1673-193x.2020.01.022]
 CHENG Fangming,CHANG Zhuchuan,SHI He,et al.Influence of wire mesh on propagation of methane/air premixing flame in pipe[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(1):135-140.[doi:10.11731/j.issn.1673-193x.2020.01.022]
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金属丝网对甲烷/空气预混火焰管道内传播的影响
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年1期
页码:
135-140
栏目:
特邀专栏
出版日期:
2020-01-30

文章信息/Info

Title:
Influence of wire mesh on propagation of methane/air premixing flame in pipe
文章编号:
1673-193X(2020)-01-0135-06
作者:
程方明常助川史合白磊罗振敏张安邦杨勇
(1.西安科技大学 安全科学与工程学院,陕西 西安 710054;
2.西安空间无线电技术研究所,陕西 西安 710100)
Author(s):
CHENG Fangming CHANG Zhuchuan SHI He BAI Lei LUO Zhenmin ZHANG Anbang YANG Yong
(1.College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;
2.Xi’an Institute of Space Radio Technology,Xi’an Shaanxi 710100,China)
关键词:
火焰传播大涡模拟金属丝网多孔介质温度衰减
Keywords:
flame propagation large eddy simulation wire mesh porous media temperature attenuation
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2020.01.022
文献标志码:
A
摘要:
为研究管道内金属丝网对甲烷/空气预混火焰传播的影响,通过实验和三维数值模拟研究安装金属丝网的管道内火焰传播特性以及流场、温度场的变化。结果表明:40目4层的金属丝网可以使火焰淬熄,30目4层的金属丝网无法淬熄,但可以使火焰停滞3 ms;大涡模型可以很好地对管道内火焰淬熄现象进行模拟;当火焰穿过30目4层金属丝网时,速度增大,在KelvinHelmholtz不稳定和RayleighTaylor不稳定的耦合作用下形成湍流;金属丝网的目数会影响热量在丝网层中的扩散,当金属丝网为30目4层时,火焰热量扩散快,而当金属丝网为40目4层时,火焰热量扩散慢且温度大幅度衰减,衰减率达到83%。
Abstract:
In order to study the influence of wire mesh in the pipe on the propagation of methane/air premixing flame,the flame propagation characteristics and the variation of flow field and temperature field in the pipe installed with wire mesh were studied through the experiments and numerical simulation.The results showed that the wire mesh with 40 mesh and 4 layers could quench the flame,while the wire mesh with 30 mesh and 4 layers could not quench the flame,but stagnate the flame for 3 ms.The large eddy model could simulate the phenomenon of flame quenching in the pipe well.When the flame passed through the wire mesh with 30 mesh and 4 layers,its velocity increased,and the turbulence formed under the coupling effect of KelvinHelmholtz instability and RayleighTaylor instability.The mesh number of wire mesh would affect the diffusion of heat in the wire mesh layer.The heat diffusion of flame was quick for the wire mesh with 30 mesh and 4 layers,while for the wire mesh with 40 mesh and 4 layers,the heat diffusion of flame was slow,and the temperature attenuated greatly with the attenuation rate of 83%.

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备注/Memo

备注/Memo:
收稿日期: 2020-01-15
* 基金项目: 国家重点研发计划项目(2017YFC0804702-5);国家自然科学基金项目(51674193)
作者简介: 程方明,博士,副教授,主要研究方向为气体与粉尘燃爆防控等。
通信作者: 常助川,硕士研究生,主要研究方向为气体与粉尘爆炸防控。
更新日期/Last Update: 2020-03-02