流经缝隙的较大油雾颗粒行为的实验研究

Experimental Research on the Behavior of Bigger Oil Mist Particles Flowing Through Clearance

对较大油雾颗粒流经缝隙后的粒径变化及其分布进行了分析.结果表明:缝隙长度为20 mm时,流经缝隙的较大油雾颗粒都发生了凝聚,且油雾颗粒凝聚后的平均粒径随着入口油雾压力、进气压力、缝隙径向间隙和空气流量的增大而逐渐减小;缝隙长度为60 mm时,流经缝隙的较大油雾颗粒大部分都在环形缝隙中凝聚,且油雾颗粒的凝聚效率随着空气流量的增大而逐渐增大;当空气流量一定时,油雾颗粒的凝聚效率随着缝隙径向间隙的变大而减小.

Influencing factors are analyzed on the diameter variation and distribution of bigger oil mist particles flowing through a annular clearance.The results show that： when the clearance length is 20 mm,the bigger oil mist particles condense after flowing through the clearance,and the average size of the condensed oil mist particles decreases gradually with the increasing of the oil mist inlet pressure,intake pressure,radial clearance and air flow;when the clearance length is 60 mm,most of the bigger oil mist particles condense in the clearance, and the condensation efficiency increases gradually with the increasing of air flow;when air flow is constant,the condensation efficiency decreases with the increasing of the radial clearance.