Abstract: PDA (Phase Dopplor Analyzer ) was employed to study the structure of spray in model combustor The measured parameters include the three dimensional velocity, mean diameter and flux of liquid particles The relation between spray parameters and operating conditions (the airflow mass and liquid pressure) was studied It is proved that water pressure can accelerate the droplets and reduce the Sauter mean diameter(SMD) The air flow can enlarge and change the shape of the spray

Key words: Aircraft engine;Combustron chember;Spraging;Fule pulverization

摘要： 使用相位多普勒分析仪PDA (PhaseDopplorAnalyzer)对模型燃烧室内的喷雾场进行了实验研究 ,测量了喷雾场不同工况下的喷雾特性 ,分析了喷雾压力和旋流器对喷雾场的影响 .证明喷嘴压力提高可以增大喷雾场中粒子速度、通量及降低平均直径 ;空气流则可以改变喷雾分布型 ,形成回流区并扩大喷雾场范围。

关键词: 航空发动机;燃烧室;喷雾;燃油雾化