合成气柔和燃烧实现条件数值研究  

Numerical Study on Realization Condition of Syngas MILD Combustion

作　　者：黄明明[1,2] 邵卫卫[1,3] 张哲巅[1] 熊燕[1,3] 刘艳[1,3] 肖云汉[1,3] 

机构地区：[1]中国科学院能源动力重点实验室(工程热物理研究所),北京100190 [2]中国科学院大学,北京100190 [3]中国科学院能源动力研究中心,江苏连云港222069

出　　处：《燃气轮机技术》2014年第1期16-21,37,共7页Gas Turbine Technology

基　　金：国家自然科学基金(51006104)

摘　　要：运用Chemkin程序建立空气分级、带烟气回流的燃烧模型,研究4种燃料、2种空气预热温度、3种工作压力下实现柔和燃烧所需的烟气回流比例。主当量比增加时,回流烟气的温度升高,氧摩尔分数降低,有利于为柔和燃烧创造"高温低氧"的氧化剂气氛,导致转捩回流比例降低。对于氢气燃料,相同烟气出口温度时,增加工作压力,转捩回流比例会升高,转捩NOx排放降低,这可能和回流烟气的氧摩尔分数降低有关。Combustion model with air staging and gas recirculation was established through CHEMKIN package and MILD combustion realization conditions in term of gas recirculation ratio were determined for four fuels , two air preheated temperatures and three pres-sures.As main equivalence ratio increases , the temperature of the recirculated flue gas increases , while oxygen mole fraction of the hot flue gas decreases, beneficial for the establishment of hot low oxygen oxidizer and leading to the decrease of critical gas recirculation ra -tio.For hydrogen fuel, pressure increment would elevate the critical equivalence ratio and decrease critical NO x emissions at the same flue gas temperature, due to the decrease of oxygen mole fraction .

关 键 词：柔和燃烧 合成气 敏感性分析 NOX排放 

分 类 号：V231.25[航空宇航科学与技术—航空宇航推进理论与工程]