磁场对强旋流燃烧过程中NO生成特性的影响  

Effect of Magnetic Field on Generation Characteristics of NO in Strong Whirl Combustion

作　　者：陈伟鹏[1] 赵增武[1] 李保卫[1] 常胜良[1] 武文斐[1] 

机构地区：[1]内蒙古科技大学,内蒙古自治区包头市014010

出　　处：《中国电机工程学报》2011年第23期61-66,共6页Proceedings of the CSEE

基　　金：重大基础研究前期研究专项(2005CCA00600);国家自然科学基金(50464004);内蒙古自然科学基金(200508010701);内蒙古科技大学创新基金(2009NC053)~~

摘　　要：在强旋流火焰周围安放固定磁场,采用CST-24型数字式磁强计测定磁场强度,采用WRNK的铠装镍铬热电偶和KM9106综合烟气分析仪检测不同磁场下强旋流燃烧火焰温度和NO浓度,分析了不同磁场下强旋流燃烧特性和NO生成特性。结果表明:在磁场作用下火焰中心温度明显提高,外缘温度有所降低,火焰外缘NO浓度显著降低。磁场通过改变强旋流火焰温度分布进而影响火焰中NO的浓度;磁场的作用使生成NO的带电离子或离子团彼此碰撞的机会减少,进而减少了火焰中NO生成。The fixed magnetic field was placed around the strongly swirling flame. Magnetic intensity, flame temperature and NO concentration in strongly swirling combustion under various magnetic fields were measured accurately by CST-24 digital magnetometer, WRNK armored chromium-nickel thermocouple and KM 9106 gas analysis instrument. The combustion characteristics and the generation characteristics of NO in strongly swirling combustion under various magnetic fields were analyzed. The results show that the effect of the magnetic field makes temperature of flame center increase obviously, makes temperature of flame fringe decrease and makes the concentration of NO in the flame fringe lower remarkably. The magnetic field affects the concentration of NO in the flame by changing the temperature distribution of the strongly swirling flame. Moreover, the magnetic field reduces the collision of the charged ions （or ion clusters） producing NO, which results in the decrease of the generation of NO in the flame.

关 键 词：固定磁场 强旋流燃烧 NO 温度场 洁净燃烧 

分 类 号：TK16[动力工程及工程热物理—热能工程]