爆炸与冲击2018，Vol.38Issue(3)：622-631,10.DOI:10.11883/bzycj-2016-0309
点火条件对密闭管道内预混氢气/空气燃爆特性的影响
Influence of different ignition conditions on deflagration characteristics of a premixed mixture of H2 and air in a closed pipe
摘要
Abstract
Numerical simulation was carried out by applying the fluid dynamics software Fluent to explore the influences of different ignition conditions,such as ignition locations (the distances from the left wall of the closed pipe are 100,200,and 500 mm,respectively),ignition temperatures (1000,1500 and 2000 K) and ignition area (ignition radius:50,35 and 20 mm) on the deflagration characteristics of the premixed H2/air mixture in a closed pipe with 1000 mm in length.The results show that,when the ignition positions are far away from the left wall of the closed pipe,the temperature of the intermediate node in the flow field is higher and the temperature rising is faster in the closed pipe.The rising rates of the maximum temperatures are basically synchronous on the conditions of the three different ignition temperatures (1000,1500 and 2000 K).Meanwhile,the combustion reaction of H2/air is more intense with the increasing of the ignition temperatures.The temperature rising rate in the closed pipe is accelerated.However,the peak pressure in the closed pipe is reduced.Moreover,the smaller the ignition area,the faster the temperature rising of H2/air in the early stage.When the radius of the ignition area is 35 mm and the ignition position away from the left side wall of the closed pipe is 100 mm,the deflagration parameters of H2/air are relatively higher.The influence of different ignition conditions on the kinetic energy and internal energy is similar to the influence of different ignition conditions on the velocity and temperature of the premixed gas,but the ignition conditions hardly influence the vorticity.关键词
点火条件/密闭管道/预混火焰/湍流燃烧/火焰前锋Key words
ignition condition/closed pipe/premixed flame/turbulent combustion/frame front分类
数理科学引用本文复制引用
孙从煌,曲艳东,刘万里,翟诚..点火条件对密闭管道内预混氢气/空气燃爆特性的影响[J].爆炸与冲击,2018,38(3):622-631,10.基金项目
国家自然科学基金项目(11302094) （11302094）
辽宁省高等学校优秀人才项目(LJQ2014063) （LJQ2014063）
辽宁省科技厅预研项目(SY201603) （SY201603）
辽宁工业大学教师科研启动基金项目(X201403) （X201403）
