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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。
In the experiments, the laminar flow flame velocities of three kinds of typical low calorific value gases (biomass gasification syngas, coal gasification syngas, blast furnace gas) and methane purge and synthesis gas purge were measured at room temperature and normal pressure . The equivalence ratio of the measured gas changed from 0.62 to 2.09. In addition, the laminar flow flame velocity of the experimental gas was simulated by Chemkin. Comparing the experimental values and calculated values, we found that the two are very close. Compared with different types of gases, the experimental results and simulation results show that the laminar flame velocity is generally low due to the low calorific value of the gas with low calorific value, which is about 20 cm / s at equivalence ratio 1. H2 Which has a great influence on the laminar flow flame velocity. The higher the H2 content of several low calorific value gases, the higher the laminar flame velocity. In addition, the CO in the low calorific value gas directly affects the peak equivalence ratio of laminar flame velocity, The deviation of 1, located in the more fuel-rich areas.