高密度烃与航空煤油燃烧特性对比试验

发布时间：2018-11-04 13:41

【摘要】：采用本生灯方法并结合数字图像处理方法分别对高密度烃和航空煤油的燃烧特性进行了试验研究,分析了不同燃油流量下当量比、预混燃气温度对层流火焰传播速度与贫油点火、熄火极限的影响,从而确定了高密度烃的层流火焰传播特性。实验研究表明:当量比为1.1时,高密度烃层流火焰传播速度达到最大值,而航空煤油在当量比为1时达到最大值,且在相同工况下高密度烃的层流火焰传播速度的最大值较小;层流火焰传播速度随混合气温度的增加而变大;燃油流量的改变对层流火焰传播速度的影响不大;相同工况下高密度烃的贫油点火、熄火极限比航空煤油的要大,且燃油流量在小于35ml/h区域内,贫油点火极限、熄火极限的当量比,都随燃油流量的变化都存在一定的波动。
[Abstract]:The combustion characteristics of high density hydrocarbon and aviation kerosene were studied by using Benson lamp method and digital image processing method, and the equivalent ratio of high density hydrocarbon and aviation kerosene was analyzed under different fuel flow rates. The effect of premixed gas temperature on laminar flame propagation velocity and the ignition and quenching limit of lean oil is discussed, and the laminar flame propagation characteristics of high density hydrocarbon are determined. The experimental results show that when the equivalent ratio is 1.1, the laminar flame propagation velocity of high density hydrocarbon reaches the maximum, while the aviation kerosene reaches the maximum when the equivalent ratio is 1. And the maximum velocity of laminar flame propagation of high density hydrocarbon is smaller under the same working condition. The velocity of laminar flame propagation increases with the increase of mixture temperature, and the change of fuel flow rate has little effect on the velocity of laminar flame propagation. Under the same working condition, the flameout limit of high density hydrocarbon is larger than that of aviation kerosene, and the fuel flow rate is smaller than that of 35ml/h. The ignition limit of lean oil and the equivalent ratio of flameout limit are all fluctuated with the change of fuel flow rate.
【作者单位】：北京动力机械研究所高超声速冲压发动机技术重点实验室;南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室;
【基金】：高超声速冲压发动机技术重点实验室开放基金资助(2012)
【分类号】：V312

【相似文献】