双油路离心喷嘴雾化特性试验

Experiment of the Atomization Characteristics of a Dual-oil-line Centrifugal Nozzle

采用LSA-Ⅲ型激光粒度仪对某型发动机一整套6个双油路离心喷嘴的雾化特性进行了试验研究,包括喷嘴主、副油路供油特性、喷雾锥角、索太尔平均粒径(SMD或d32)及其尺寸分布。结果表明,主、副油路的质量流量总不均匀度系数分别为2.42%和3.29%,主、副油路喷雾锥角充分展开后喷雾锥角和平均粒径随供油压力的增大而减小,斜率绝对值逐渐变小。分析了中心副油路在低供油压力下雾锥的展开过程,喷雾锥角随供油压力增加迅速变大,平均粒径随供油压力增加迅速变小。

Experimentally studied were the atomization characteristics of a whole set of 6 dual-oil-line nozzles of an engine by using a LSA-Ⅲ type laser particle size meter,including the oil supply characteristics of the main and auxiliary oil line,atomization cone angle,Sauter mean particle diameter(SMD or d32) and the dimension distribution.The research results show that the total non-uniformity coefficients of the mass flow rates of the main and auxiliary oil line are 2.42% and 3.29% respectively.The atomization cone angle and mean particle diameter will decrease and the absolute value of the slope will gradually become smaller with an increase of the oil supply pressure after the atomization cone angles of the main and auxiliary oil line have been fully developed.The development process of the atomization cone of the central auxiliary oil line was analyzed at a low oil supply pressure.The atomization cone angle will quickly become bigger and the mean particle diameter will rapidly become smaller with an increase of the oil supply pressure.