The combustion process of propane/air premixed flame in meso-scale quartz tubes with different hydrogen additions was investigated experimentally to explain the flame-wall interaction mechanism. The ranges of different flame regimes were obtained by changing the flow rates of propane and hydrogen. The effects of hydrogen addition, inlet velocity and equivalence ratio were analyzed. The results show that the hydrogen addition broadens the operation ranges of fast flame regime and slow flame regime significantly. The flame propagation speed is in the same order of the thermal wave speed in solid wall for the slow flames. In fast flame regime, the flame propagation speed has an inverse correlation with the inlet flow velocity irrespective of the equivalence ratio. With the increase of the equivalence ratio, the maximum flame speed in fast flame regime decreases gradually, while the maximum flame speed in slow flame regime increases continually. It indicates that rich fuel condition suppresses the fast flame and promotes the slow flame. In slow flame regime, the output thermal efficiency is dominated by the inlet velocity and equivalence ratio.

实验研究了丙烷/空气预混火焰在中尺度石英管中添加不同氢的燃烧过程，以解释火焰壁相互作用的机理。通过改变丙烷和氢气的流速来获得不同火焰状态的范围。分析了加氢，进口速度和当量比的影响。结果表明，氢气的加入显着拓宽了快火焰和慢火焰的运行范围。对于慢速火焰，火焰传播速度与固体壁中热波速度的顺序相同。在快速火焰状态下，不管当量比如何，火焰传播速度都与入口流速成反比。随着当量比的增加，快速火焰状态下的最大火焰速度逐渐减小，而慢速火焰状态下的最大火焰速度不断增加。这表明富油条件抑制了快火焰并促进了慢火焰。在慢火焰状态下，输出热效率主要取决于入口速度和当量比。