渐变截面管道内甲烷/氢气/空气预混爆燃传播特性研究
Study on propagation characteristics of methane/hydrogen/air premixed deflagration in pipelines with gradual cross-section
申宏栋 1邢宝山2
作者信息
- 1. 焦作千业新材料有限公司,河南焦作 454100
- 2. 焦作煤业(集团)有限责任公司,河南焦作 454100
- 折叠
摘要
变截面管道是一种能够通过改变管道横截面积和形状来调节流体流动特性的管道形式,利用 自主搭建的实验平台开展不同当量比及氢气体积分数的预混爆炸实验,对渐变截面管道中甲烷掺氢预混气体爆炸的压力波和火焰传播图像进行同步分析,并探究甲烷掺氢预混气体爆炸压力,以期为甲烷掺氢预混气体的运输做出预防和评估,并为防火防爆设计提供依据.研究结果表明,当混合气体处于0～300 mm管道部分时,不同当量比火焰变化趋势基本相同;当火焰锋面进入渐变截面管道部分,即300～600 mm时,火焰速度变化较大.其中,当量比为0.8时,火焰速度先升高后下降;当量比为1.0、1.2时,速度变化持续升高.
Abstract
Gradual cross-section pipeline is a type of pipeline form that can regulate fluid flow characteristics by changing the cross-sec-tional area and shape of the pipeline.By using the independently constructed test platform,the premixed explosion test with different e-quivalence ratios and hydrogen volume fractions was carry out,the pressure wave and flame propagation images of the explosion of the methane-doped hydrogen premixed gas in the gradual cross-section pipeline was analyzed synchronously,and the explosion pressure of the methane-doped hydrogen premixed gas was investigated,in order to prevent and evaluate the transportation of methane hydrogen premixed gas,and a basis for fire and explosion prevention design was provided.The results of the study show that when the premixed gas is in the 0-300 mm pipe section,different equivalence ratios of the flame change trend is basically the same;when the flame front in the gradual cross-section of the pipe section,that is,300-600 mm,the flame speed change is greater.When the equivalence ratio is 0.8,the flame ve-locity first increases and then decreases;when the equivalence ratio is 1.0 and 1.2,the velocity change continues to increase.
关键词
渐变截面管道/氢气/甲烷/预混气体/火焰传播速度/爆炸Key words
gradient cross-section pipeline/hydrogen/methane/premixed gas/flame propagation speed/explosion引用本文复制引用
基金项目
国家自然科学基金项目(51774115)
河南省科技攻关项目(222102320105)
出版年
2024
NETL
NSTL
万方数据