壁面参数对发动机微燃烧室氢气/空气预混燃烧的影响  

Effects of Wall Parameter on H/A Premixed Combustion in Engine Micro Combustor

作　　者：李玉兰[1] LI Yulan(Zhenjiang Branch Jiangsu Union Technical Institute,ZhenJiang Jiangsu 212016,China)

机构地区：[1]江苏联合职业技术学院镇江分院,江苏镇江212016

出　　处：《农业科技与装备》2017年第9期44-47,共4页Agricultural Science & Technology and Equipment

摘　　要：根据微尺度燃烧室内氢气和空气的预混燃烧过程,利用STAR-CD计算软件建立微燃烧的物理和数学模型,在试验验证的基础上模拟壁面导热系数、壁厚和外壁面传热系数等壁面参数对氢气和空气预混合燃烧的影响。结果表明:靠近燃烧室入口处的火焰中心温度随导热系数减小而增加,出口处混合气体的温度随导热系数减小而降低;随着外壁面厚度增加,外壁面温度降低,壁面温度分布更均匀;随着外壁面传热系数增加,燃烧室内火焰温度降低,出口处的气体温度和外壁面温度相应降低。According to the premixed combustion process between hydrogen and air in micro-scale combustion chamber internal,the computing software STAR-CD was used to establish micro combustion of the physical and mathematical model.On the basis of experimental verification the wall parameters such as wall thermal conductivity,wall thickness and outside wall heat transfer coefficient was simulated to the effect on hydrogen and air premixed combustion.The results showed that:The close to the flame center at the entrance to the combustion chamber temperature increased with the decrease of the coefficient of thermal conductivity,but the mixed gas temperature at the combustion chamber exit reduced with the decrease of the coefficient of thermal conductivity;With the increase of burning outdoor wall thickness,outer wall temperature was reduced,and the wall temperature distribution more uniform;With the increase of burning outside wall heat transfer coefficient,flame temperature inside the combustion chamber was reduced,and gas temperature at the combustion chamber exit and outside wall temperature was correspondingly reduced.

关 键 词：微燃烧室 壁面参数 数值模拟 燃烧特性 氢气 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]