关键结构参数对离心式雾化喷嘴雾化效果的影响研究  

Influence of Design Parameters of the Swirl Nozzle on Its Spray Characteristics

作　　者：潘华辰[1] 周泽磊[1] 刘雷[1] PAN Huachen ZHOU Zelei LIU Lei(School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018)

机构地区：[1]杭州电子科技大学机械工程学院,杭州310018

出　　处：《机械工程学报》2017年第2期199-206,共8页Journal of Mechanical Engineering

摘　　要：为提高某离心式喷嘴的雾化质量,对其内部结构进行改进优化,并采用数值模拟和试验相结合的方法详细探讨切向槽位置和倾斜角度对雾化效果的影响。结果表明:数值仿真可以较好地模拟喷嘴的雾化特性,其结果与试验吻合良好;位置和倾角的改变会影响雾化颗粒粒径和雾化锥角,其中雾化锥角受倾角的影响较为显著,随倾角的增大而减小;随着压力增大,雾化颗粒粒径会逐渐减小,雾化锥角逐渐增大并趋于稳定;9组不同工况下喷嘴雾化效果对比表明,在旋流室圆锥半径1/2或3/4处设置20°倾角的切向槽,雾化效果最佳。In order to improve the atomization quality of a pressure-swirl nozzle, different design parameters of the nozzle such as tangential slot＇s location and tilt angle are selected to study their influence on atomization characteristics of the nozzle, using both numerical simulations and experimental tests. The results show that numerical simulations can reasonably predict the nozzle＇s atomization angles which fit the experimental results well. The change of tangential slot＇s position and angle will influence the particle diameter and atomization angle of spray. The tangential slot tilt angle＇s influence on pray angle is significant. Larger tilt angle leads to smaller spray angle. In addition, as the pressure increases, the particle diameter will gradually decrease. At the same time the atomization angle will increase and tend to be stabilized at some pressure level. Based on the results of 9 test cases with different design parameters, it is found that the best location of tangential slot is at the radial location of 1/2 or 3/4 cone＇s radius, while its tilt angle is 20°.

关 键 词：离心式喷嘴 数值仿真 雾化颗粒粒径 雾化锥角 切向槽 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]