离心条件下后台阶贫油熄火特性

利用气流通过弯管产生的离心效应来模拟高速旋转的工况,研究高位后台阶火焰稳定器的关键几何参数对液雾燃烧贫油熄火特性的影响.通过控制后台阶高度,台阶板长度,后台阶到上壁面的距离三个几何参数,考察它们对后台阶火焰稳定器贫油熄火特性的影响.试验得到的结果表明在离心条件下,后台阶高度和台阶板长度对贫油熄火特性的影响较大,随着后台...

Characteristics of lean blowout limit for backward step-stabilized flame with centrifugal force effect

Using the centrifugal force effect of a whirl flow through a curved pipe to simulate the working conditions in the rotor combustion system,this thesis investigated the effect of the geometric parameters on lean blowout limit of spray combustion for the backward step flame holder.On the basis of a curved flow channel experiment rig,a backward step flame holder was designed with variable geometric parameters.The geometric parameters include:the height,length and distance between backward step and wall surface.The effect of these three geometric parameters on the lean blowout limit of spray combustion was investigated.Test results indicate that,the height and length have great effect on flame blowout limit.With the increase of the height and length,the lean blowout limit decreases;but the distance between backward step and wall surface has little effect on flame blowout limit.For each backward step flame holder,while centrifugal force effect increases,the flame lean blowout limit is reduced and flameout range is broadened.This research work has laid a foundation for investigation of spray combustion on the rotor combustion system.