弯尾管Helmholtz型无阀自激脉动燃烧器NO_x排放特性  

NO_x emission characteristics of a Helmholtz valveless self-excited pulse combustor with bend tailpipe

作　　者：徐艳英[1] 翟明[2] 董芃[2] 朱群益[2] 

机构地区：[1]沈阳航空航天大学安全工程学院,辽宁沈阳110136 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《热力发电》2015年第2期18-23,共6页Thermal Power Generation

基　　金：国家自然科学基金青年科学基金项目(51206032);中国博士后基金(2013M531037);黑龙江省博士后资助经费(LBH-Z12101)

摘　　要：对弯尾管Helmholtz型无阀自激脉动燃烧器的NOx排放特性进行了实验研究。结果表明:当燃烧器结构不变时,尾管出口烟气中NOx排放量在初始阶段随热负荷的增加而增大,当热负荷增加到某一值时NOx的排放量最大,而后NOx排放量随热负荷的增加而减少;NOx排放量随过量空气系数的增加而减少;燃烧温度及烟气在高温区的停留时间对Helmhotlz型脉动燃烧器NOx排放量影响较大,一般存在一个较合理的热负荷区间,在此区间内虽然热负荷和燃烧温度较高,但由于烟气在高温区停留时间变短,NOx排放量反而较低,这一特点对Helmhotlz型脉动燃烧器运行时如何降低NOx的排放量有指导意义。Experimental study on NOxemission characteristics of a valveless self-excited pulse combustor of Helmholtz type with bend tailpipes was carried out.The results show that,when the combustor＇s structure is fixed,the NOxemission at tailpipe exit increased first and then decreased with the increasing heat load,it decreased with an increase in excess air ratio.The combustion temperature and residence time of the flue gas in high temperature area has great influence on NOxemission of the Helmhotlz pulse combustor.Generally,there is a reasonable heat load window in which the NOxemission becomes low due to short residence time of the flue gas in high temperature zone,although heat load and combustion temperature are very high.

关 键 词：Helmholtz型脉动燃烧器 无阀自激式 弯尾管 过量空气系数 热负荷 NOX排放特性 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]