【摘要】 采用相位多普勒粒子分析仪(PDPA)对某型航空发动机双路离心喷嘴的雾化特性进行了实验研究,得到了索太尔平均直径(d32)的空间分布和喷雾锥角.实验结果表明:液滴尺寸随着供油压力的增大而减小,当压力增大到一定程度,液滴尺寸趋于不变;当主、副油路分别单独工作时,随测量横截面与喷口之间距离Z的增加,d32减小;在供油压力不变时,同一个测量横截面内,随着径向距离X的增加d32值变化不大;喷雾锥角基本不随供油压力改变而变化.更多还原

【Abstract】 The atomization quality of a double line pressure-swirl atomizer for aero-engine was investigated using phase Doppler particle analyzer(PDPA).The spacial distributions of Sauter mean diameter(d32) and the angle of spray cone were obtained.The results show that: the droplet size decreases with the increase of fuel-supplying pressure,and tends to become invariable when the pressure rises to certain extent;the spray cone angle is basically independent from fuel-supplying pressure;d32 decreases with the widening distance from the spray nozzle,when the main or secondary fuel lines operates respectively;at the same measuring cross section,d32 slightly changes with the radial distance.更多还原