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在液化气与空气燃烧的层流火焰两侧施加放电磁场,测定磁场强度,采用双铂铑热电偶和综合烟气分析仪检测层流自由射流火焰温度和NO浓度,分析了不同磁场强度下层流自由射流火焰特性和NO生成特性.结果表明,在电磁场作用下火焰长度变短,火焰下部直径增大;随磁场强度增大,火焰面下部温度提高.电磁场可减少火焰中N,HCN,CN等离子和离子团与氧的碰撞几率,导致NO浓度降低,最大下降值为4.26mg/m3,最大降幅为78.60%.
The discharge magnetic field was applied on both sides of the laminar flame of liquefied gas and air combustion and the magnetic field intensity was measured. The flame temperature and the NO concentration of laminar free jet were measured by dual-platinum-rhodium thermocouple and integrated flue gas analyzer. The results show that the length of the flame is shortened and the diameter of the lower part of the flame is increased under the action of the electromagnetic field. The temperature of the lower part of the flame surface increases with the increase of the magnetic field intensity. The electromagnetic field can reduce the N, HCN and CN ions in the flame And the collision probability between ion groups and oxygen, resulting in the reduction of NO concentration, the maximum decrease was 4.26mg / m3, the largest decline of 78.60%.