扇形雾喷头雾化过程中雾滴运动特性

摘要

The droplets velocity in spraying fan of flat fan nozzle LU120 - 03 was tested by phase Doppler particle analyzer ( PDPA). The initial velocity was liquid-sheet velocity and the velocity distribution in spraying fan was confirmed. The results showed that the velocity of minimum droplets in spraying fan edge was lower than that in central position near the nozzle, so it was more likely to drift; the fine droplets velocity decreased rapidly far away from the nozzle so that the droplets were very easy to result in drift influenced by airflow.%利用相位多普勒粒子分析仪测试了LU120-03型扇形雾喷头喷雾扇面内的雾滴运动速度,计算得出雾滴运动初速度即液膜破碎速度,确定了雾滴在喷雾扇面内的速度分布.结果表明:靠近喷头的区域,扇面边缘的最小雾滴速度小于中心位置的最小雾滴速度,更易飘失;远离喷头的区域,细小雾滴速度迅速衰减,极易受气流影响而产生飘失.