摘要
实验采用热流量炉方法,在常温常压下对3种典型低热值气体(生物质气化合成气、煤气化合成气、高炉煤气)以及甲烷和合成氨驰放气的层流火焰速度进行了测量。所测气体的当量比从0.62变化到2.09。另外,通过Chemkin对实验气体的层流火焰速度进行了模拟计算。对比实验值和计算值,发现两者非常接近。比较不同种类气体的实验结果和模拟计算结果显示:由于所测低热值气体具有较低的低位发热量,其层流火焰速度普遍较低,在当量比1处,大约为20 cm/s;H2对层流火焰速度具有很大的影响,几种低热值气体中H2含量越高,其层流火焰速度越大;另外,低热值气体中的CO直接影响层流火焰速度的峰值当量比,使其偏离1,位于比较富燃的区域。
The laminar flame speed of three typical low calorific value （LCV） gases （biomass gasified gas, coal gasified gas, blast furnace gas）, methane and ammonia purge gas was measured at atmospheric pressure and ambient temperature, using heat flux method. Equivalence ratios from 0.62 to 2.09 were investigated. The laminar flame speed simulations of these gases were carried out with Chemkin. The results of experiments and Chemkin simulations are very close to each other. Comparing these different gases＇ experiments and model simulations results, it is found out that the laminar flame speed of these LCV gases is low, which is about 20 cm/s at stoichiometric condition, due to their low heating value （LHV）. Laminar flame speed is also influenced by H2 fraction significantly. The LCV gases with bigger H2 fraction have higher laminar flame speed. Besides, CO in the LCV gases makes the peak of laminar flame speed shift to the rich side.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第8期74-80,13,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(51176169)~~
关键词
低热值
层流火焰速度
热流量法
当量比
绝热火焰
low calorific value（LCV）
laminar flame speed
heat flux method
equivalence ratio
adiabatic flame
