摘要
利用自主搭建的实验平台,对距离点火源30、50、70 cm和厚度为2、4、6 cm的多孔陶瓷抑制甲烷爆炸效果展开实验研究。结果表明,多孔陶瓷可延长层流火焰的传播时间,减缓火焰由层流向湍流的转变。爆炸火焰接触多孔陶瓷时发生淬熄,导致爆炸反应终止。多孔陶瓷与点火源之间距离的增加或多孔陶瓷厚度增加时,火焰锋面速度下降,但材料厚度对火焰锋面速度的影响效果相比于放置位置更加明显。超压上升速率随着多孔陶瓷与点火源距离的增加而降低,其与点火源距离较近即放置于30 cm处时,对超压的衰减效果最佳。增加多孔陶瓷的厚度时,甲烷爆炸超压峰值降低。
Experimental study on the methane explosion effect of porous ceramics with distance of 30,50,70 cm from the ignition source and thickness of 2,4 and 6 cm was carried out through an experimental platform built independently.The results showed that porous ceramics can prolong the propagation time of laminar flame and slow the transition of flame from laminar to turbulent.Quenching occurs when the explosive flame contacts the porous ceramic,and resulting in the termination of the explosive reaction.As the distance between porous ceramics and the ignition source increases or the thickness of porous ceramics increases,the flame front speed decreases,but the effect of thickness on the flame front speed is more obvious than that of the placement.The rate of over⁃pressure rise decreases with the increase of distance between the porous ceramic and the ignition source.When the distance between the porous ceramic and the ignition source is 30 cm,the attenuation effect of overpressure is the best.The peak pressure of methane explosion overpressure decreases with the increase of thickness of porous ceramics.
作者
段玉龙
王硕
王文和
邓智迅
赖帆
张晏华
DUAN Yu-long;WANG Shuo;WANG Wen-he;DENG Zhi-xun;LAI Fan;ZHANG Yan-hua(College of Safety Engineering,Chongqing University of Science&Technology,Chongqing 401331,China;Center for Multiscale Process Safety Research in Oil&Gas,Chongqing 401331,China;Chongqing Fengmingshan High School,Chongq-ing 400037,China.)
出处
《消防科学与技术》
CAS
北大核心
2020年第6期746-749,共4页
Fire Science and Technology
基金
重庆市自然科学基金面上项目(CSTC2019JCYJ-MSXMX0324)
重庆市教委科学技术研究项目(KJQN201801517)
重庆科技学院校内科研基金(CK2017ZKYB001)
西安近代化学研究所开放合作创新基金项目(2018YFC08209500)。
关键词
气体爆炸
多孔陶瓷
火焰淬熄
抑爆
gas explosion
porous ceramics
flame quench
explosion suppression
