微细通道中甲烷与氧气的预混燃烧

对微细通道中甲烷/氧气预混火焰传播性质进行了实验研究．确定了微细通道中不同甲烷浓度下的火焰传播速度,以及混合气体流量与火焰传播速度的关系．结果表明,混合气体流量对火焰传播速度有显著的影响,在微细通道中火焰传播速度的分布趋势与宏观尺度下火焰传播速度的分布趋势基本相同,但在数值上随着流量的不同相差较大．实验证明,在室温条件下,甲烷和氧气预混火焰可以在细管中稳定停留在一点燃烧,并且可以很好地控制其移动;当量比为1．0时火焰传播速度受流量影响最大．

Methane-Oxygen Premixed Combustion in Micro-Scale Tube

Properties of flame propagation in a micro-scale tube is investigated experimentally using methane/oxygen mixtures. The effects of flow rate on flame propagation speeds in the tube are investigated and flame propagation speeds are also investigated under different percentages of methane. The results show that there is a dramatic effect on flame propagation speeds when flow rate is changed. The distribution of flame propagation speeds in the small-scale tube is similar to that in a macro tube, but the values of flame propagation speeds are different with different flow rates. Methane-oxygen pre-mix tures can burn steadily at room temperature, and the front of flame can be controlled commendably by changing volume flow of premixed gas. The flame propagation speeds under equivalence ratio equaling to 1.0 are the most sensitive to the flow rate.