天然气与石油2018，Vol.36Issue(3)：92-97,6.DOI:10.3969/j.issn.1006-5539.2018.03.018
新型后混合磨料水射流喷嘴流场数值模拟研究
Numerical Simulation Research on the Flow Field in New Rear-Mixed Abrasive Water Jet Nozzle
摘要
Abstract
Abrasive water jet cutting (AWJ) technology has an important application prospect in emergency repair of oil depot. A new type of rear-mixed AWJ nozzle was studied in this paper, and the multiphase flow characteristics in nozzle were analyzed by numerical simulation. The results show that the negative pressure is generated inside the nozzle. As the water moves towards the downstream of the nozzle, the rigidity of the water decreases, which is beneficial to the entry of abrasives. The turbulent kinetic energy is mainly distributed in the contraction section. In order to improve the mixture of water and abrasive, it is recommended that the abrasive inlet should be as close to the contraction section as possible. At the nozzle outlet, the abrasive is mainly distributed near the wall, while the water is concentrated near the axis, and the water and the abrasives mixed unevenly at the nozzle outlet. The wear of nozzle mainly occurs at the downstream of the contraction section and upstream of the cylinder section. Although the new rear-mixed AWJ nozzle cannot completely solve the issue of uneven mixture of water and abrasive, the distribution of the abrasive inside the nozzle is more symmetrical and the nozzle wear is relatively uniform, which reduces the inhomogeneity of the abrasive and water and prolongs the service life of the nozzle.关键词
后混合磨料水射流/喷嘴/流场/数值模拟Key words
Rear-mixed abrasive water jet/Nozzle/Flow field/Numerical simulation引用本文复制引用
陈晓晨,邓松圣,张滕飞,管金发..新型后混合磨料水射流喷嘴流场数值模拟研究[J].天然气与石油,2018,36(3):92-97,6.基金项目
总后勤部项目(YX213C208) （YX213C208）
重庆市基础科学与前沿技术研究项目(cstc2017jcyjAX0166) （cstc2017jcyjAX0166）
