某空气雾化旋流喷嘴在受限空间内雾化特性的实验研究  

Experimental Study on Spray Characteristic of Air-assist Swirl Nozzle in Confined Space

作　　者：刘焜[1] 余永刚[1] 赵娜[2] 

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094 [2]西北机电工程研究所,陕西咸阳712099

出　　处：《兵工学报》2015年第10期1882-1887,共6页Acta Armamentarii

基　　金：教育部博士点基金项目(20113219110024)

摘　　要：为了研究某空气雾化旋流喷嘴在受限空间内的雾化特性,采用多普勒相位粒子动态分析仪测量了雾化场中液滴的粒径和轴向速度,并将大气环境中和受限空间内的雾化参数进行了对比分析。结果表明:雾化液滴的索特平均直径由气体和液体喷射压力共同决定;随着距喷嘴轴向距离的增大,液滴索特平均直径呈现先减小后增大的变化趋势,液滴轴向速度逐渐减小;当液体喷射压力一定时,气体喷射压力增大,液滴索特平均直径变小,液滴轴向速度变大;当气体喷射压力一定时,液体喷射压力增大,液滴索特平均直径增大,但液滴轴向速度变化较小。To investigate the spray characteristic of an air-assist swirl nozzle in confined space,the distributions of Sauter mean diameter（ SMD） and axial velocity of droplets are measured,respectively,using laser phase Dopper analyzer（ PDA）. The spray parameters in atmospheric environment and confined space are compared and analyzed. The results indicate that the mean diameter of droplets is determined by liquid pressure and gas pressure. With the increase in the distance between the measuring point and the nozzle,the mean diameter of droplets increases firstly and then decreases,and the axial velocity of droplets decreases. When the liquid pressure is constant and the gas pressure improves,the mean diameter of droplets decreases and the axial velocity increases. When the gas pressure is constant and the liquid pressure improves,the mean diameter of droplets increases while the axial velocity changes slightly.

关 键 词：工程热物理 空气雾化喷嘴 压力旋流 雾化 受限空间 

分 类 号：V434.3[航空宇航科学与技术—航空宇航推进理论与工程]