摘要
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 electromagnetic field was placed on both sides of the laminar flame from combustion of liquefied gas and air, and the magnetic-field intensity measured. The laminar free jet flame temperature was detected with rhodium-doubled thermocouple and the NO concentration measured. The laminar free jet flame and NO generation characteristics under different intensity electromagnetic field were analyzed. The results show that the electromagnetic field makes the flame length shorten and the bottom diameter of flame increase. With the increase of electromagnetic field intensity, the temperature of flame bottom rises. Moreover, the electromagnetic field can change the probability of collision among ions or ion groups, such as N, HCN and CN, and oxygen, which results in the decrease of NO concentration. The electromagnetic field makes the maximum NO concentration reduce 4.26 mg/m3 and 78.60%.
出处
《过程工程学报》
CAS
CSCD
北大核心
2012年第6期952-956,共5页
The Chinese Journal of Process Engineering
基金
内蒙古自然科学基金资助项目(编号:2011MS0707)
关键词
电磁场
燃烧
层流火焰
火焰温度
NO
electromagnetic field
combustion
laminar flame
flame temperature
NO
