圆管内正丁醇火焰传播行为研究  

Oscillatory Behavior of Flame Spread on n-Butanol Fuel in a Tube

作　　者：李满厚 许治国 Li Manhou;Xu Zhiguo(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui International Joint Research Center on Hydrogen Safety,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]安徽省氢安全国际联合研究中心,合肥230009

出　　处：《燃烧科学与技术》2024年第6期575-579,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52176103);安徽省重点研究与开发计划资助项目(2022m07020012);中央高校基本科研业务费专项资金资助项目(JZ2024HGTG0303).

摘　　要：本文通过自行设计的可存储燃料的高透石英玻璃管道模拟狭长受限空间,以正丁醇为燃料通过控制不同的封堵率研究受限空间液体火蔓延行为.研究表明,狭长管道内的火蔓延行为与开放空间火蔓延存在显著差异,对长100 cm、内径10 cm的管道表现为:火焰蔓延到右端、火焰蔓延到右端并发生火焰穿梭,火焰无法蔓延至另一端.管道内火焰分离,中间没有连续稳定燃烧区域.当封堵率超过63%时,火焰无法蔓延至另一端;管道内火焰分离位置随着封堵率增加而减小.In recent years,oil pipeline accidents have occurred frequently,causing large economic losses,casualties and environmental pollution.Previous work has mainly studied spilling fires and pool fires caused by oil leaks in open space,but less research has been conducted involving flame spread on liquid surface inside longnarrow confined space(i.e.,underground culverts and sewer pipes).In this paper,a self-designed highly transparent quartz glass pipe is used to simulate long-narrow confined space.The behavior of flame spread over nbutanol is investigated by controlling the sealing ratio of the tube.The result shows that the flame spread behavior in confined space is significantly different from that in open space.For flame spread in a 100 cm-long and 10 cminner diameter tube,there are three regimes:pulsating flame spread,flame shuttle spread,and incomplete flame spread.As the sealing ratio is beyond 63%,the incomplete flame spread occurs.The longitudinal flame zone is separated during the flame propagation,and there is no continuous burning area in the middle of the tube.The flame separation position decreases as the sealing ratio increases.

关 键 词：火蔓延 液体燃料 受限空间 火焰分离 火焰穿梭 

分 类 号：X91[环境科学与工程—安全科学]