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利用球形火焰法测量了常压下、温度为353~400K、当量比为0.6~1.4的丙基苯/空气预混气的层流燃烧速率.结果表明,不同初始温度下测得的丙基苯/空气预混物无拉伸层流燃烧速率均在当量比1.1处达到最大值;随着初始温度的升高,丙基苯/空气预混物的拉伸火焰传播速率、无拉伸层流燃烧速率均会增加;并从不同初始温度下的Markstein长度与当量比的变化关系中发现,Markstein长度会随着当量比的增加而减小,在当量比为1.4时出现负值;同时,Markstein长度会随着温度的增加而略微减小.
The laminar flow rate of propylbenzene / air premixed gas under atmospheric pressure at 353-400 K and equivalence ratio of 0.6-1.4 was measured by a spherical flame method. The results showed that the conversion of propylbenzene / Air pre-mixture non-tensile laminar flow rate at the equivalence ratio of 1.1 to reach the maximum; with the initial temperature increases, propylene / air premix tensile flame propagation velocity, non-tensile laminar flow The results show that the Markstein length decreases with the increase of equivalence ratio and shows a negative value at equivalence ratio of 1.4. Meanwhile, Markstein’s length decreases with increasing of Markstein length and equivalence ratio at different initial temperatures. The length decreases slightly with increasing temperature.