摘要
采用Ansys Fluent软件并基于Schnerr与Sauer空化模型,对出口压力小于10Pa平口喷嘴内部的空化流动进行了模拟,研究了喷射压力和喷嘴直径对喷嘴内部蒸汽体积和湍动能分布的影响。结果表明,高喷射压力(10 MPa)对喷嘴内部蒸汽体积的作用减弱,喷射压力为10MPa时,喷嘴出口径向上的蒸汽体积大于其它喷射压力下的蒸汽体积,可获得较好的空化效果;喷嘴内的湍动能随喷射压力的增加而增加;喷嘴直径对喷嘴内部的空化流动有很大的影响,喷嘴直径越小所产生的空化流动越强烈,对比其它直径的喷嘴,直径为0.1 mm的喷嘴在出口处的蒸汽体积和湍动能较大,有助于雾化质量的提高。
The cavitation flow inside the plain-orifice nozzle at low outlet pressure（10 Pa）was simulated with software package Ansys Fluent,based on the Schnerr and Sauer models.The influence of the injection pressure and nozzle diameter on the vapor-volume distributions and turbulence kinetic energy（TKE）of the cavitation flow was calculated.The simulated results show that the injection pressure and nozzle diameter strongly affects the cavitation flow.For example,an injection pressure higher than 10 MPa weakly influences the vapor volume inside the nozzle,but a good cavitation flow occurs at 10 MPa.The TKE inside the nozzle increases with an increase of the injection pressure.Moreover,a smaller nozzle diameter（0.4,0.3,0.2,and 0.1 mm）results in a stronger cavitation flow.We suggest that the nozzle,0.1 mm in diameter,may generate the largest vapor volume and TKE,and significantly improve the atomization of the spraying technology.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2013年第3期277-283,共7页
Chinese Journal of Vacuum Science and Technology
基金
中央高校基本科研业务费专项资助项目(N110403001)
高等学校博士学科点专项科研基金项目(20100042120023)
关键词
平口喷嘴
空化
Fluent模拟
真空喷射法
Plain-orifice nozzle
Cavitation
Fluent simulation
Vacuum spray method
作者简介
联系人：E-mail：jcli@mail．neu．edu．cn
