Experimental investigation on the self-acceleration of 10%H-2/90%CO/air turbulent expanding premixed flame
Experimental investigation on the self-acceleration of 10%H-2/90%CO/air turbulent expanding premixed flame
复制标题
实验%20调查%20on%20the%20自加速%20of%2010%H-2/90%CO/空气%20湍流%20膨胀%20预混%20火焰
DOI：
10.1016/j.ijhydene.2019.07.154
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发表时间：
2019
影响因子：
7.2
通讯作者：
Lv Jia Cheng
中科院分区：
文献类型：
--
作者：
Zhang Guo Peng;Li Guo Xiu;Li Hong Meng;Jiang Yan Huan;Lv Jia Cheng
使用 10% H2/90% CO/空气混合物湍流预混火焰，通过改变大气压力和温度下的湍流强度和当量比，对合成气/空气混合物湍流预混火焰的自加速特性进行实验评估。评价了湍流预混火焰的传播特性，包括合成气/空气混合物湍流预混火焰的火焰传播速度和湍流燃烧速度的变化。此外，还评估了湍流预混火焰自加速特性的影响。结果表明，湍流逐渐使预混火焰的半径从线性增长变为非线性增长。随着湍流强度的增加，火焰锋蜂窝结构的形成加速，火焰传播速度和燃烧速度加快。在过渡阶段，当量比为0.6时，湍流预混火焰的加速指数和分形过剩随着当量比的增加而减小，随着湍流强度的增加而增加。加速度指数始终大于1.5。
The self-acceleration characteristics of a syngas/air mixture turbulent premixed flame were experimentally evaluated using a 10% H2/90% CO/air mixture turbulent premixed flame by varying the turbulence intensity and equivalence ratio at atmospheric pressure and temperature. The propagation characteristics of the turbulent premixed flame including the variation in the flame propagation speed and turbulent burning velocity of the syngas/air mixture turbulent premixed flame were evaluated. In addition, the effect of the self-acceleration characteristics of the turbulent premixed flame was also evaluated. The results show that turbulence gradually changes the radius of the premixed flame from linear growth to nonlinear growth. With the increase of turbulence intensity, the formation of a cellular structure of the flame front accelerated, increasing the flame propagation speed and burning speed. In the transition stage, the acceleration exponent and fractal excess of the turbulent premixed flame decreased with increasing equivalence ratio and increased with increasing turbulence intensity at an equivalence ratio of 0.6. The acceleration exponent was always greater than 1.5.