爆炸与冲击2018，Vol.38Issue(2)：381-389,9.DOI:10.11883/bzycj-2016-0198
微小空间内丙烷/空气火焰传播特性与加氢爆燃实验
Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber
摘要
Abstract
An experimental study on the characteristics of propane/air and propane/hydrogen/air flame propagation,at ambient temperature and pressure,was carried out in a narrow-gapped micro-chamber shaped like a disk and 150 mm in diameter,which was ignited by a spark igniter;photographs of the flame propagation were obtained with a high-speed camera at a gap distance of 2.0,2.5,3.0 and 5.0 mm,respectively;and the flame was observed to be smooth,wrinkled,and broken.As the flame equivalence ratio increases or the height of the gap decreases,the flame wrinkles occur earlier.The flame speed in the micro-chamber was slightly lower than that in the conventional-scale chamber,and it gradually decreased as the flame radius increased.As the gap height decreased,the flame propagation speed increased at first and then decreased,reaching the maximum at the gap height of 3 mm in the micro-chamber.As the heat loss increased,the micro scale effects played an important role in reducing the flame speed and enhancing the flame instability.Addition of hydrogen raised the flame propagation speed,and led to the detonation observed in the micro-chamber at a gap width of 2.5 mm.关键词
微尺度燃烧/火焰传播/火焰皱褶/传播速度/爆燃Key words
microscale combustion/flame propagation/flame wrinkles/flame speed/detonation分类
数理科学引用本文复制引用
苏航,蒋利桥,曹海亮,刘秦飞,李言钦,汪小憨,赵黛青..微小空间内丙烷/空气火焰传播特性与加氢爆燃实验[J].爆炸与冲击,2018,38(2):381-389,9.基金项目
国家重点基础研究发展计划项目(2014CB239600) （2014CB239600）
国家自然科学基金项目(51336010,51176174) （51336010,51176174）
广东省科技计划项目(2016A040403095,2014A050503054) （2016A040403095,2014A050503054）
