中国石油大学学报（自然科学版）2016，Vol.40Issue(6)：80-86,7.DOI:10.3969/j.issn.1673-5005.2016.06.010
液氮磨料射流流场特性及颗粒加速效果研究
Flow behavior and particle acceleration effect of abrasive liquid nitrogen jet
摘要
Abstract
Abrasive particles can be added into liquid nitrogen to form an abrasive liquid nitrogen jet ( ALNJ ) for rocking breaking. In this study, the flow behavior of the ALNJ was studied using the computational fluid dynamics method, considering the properties of liquid nitrogen and its interactions with abrasive particles. The acceleration effect of liquid nitrogen on parti-cles was analyzed. The results show that, at the same nozzle pressure drop, the abrasive liquid nitrogen jet not only has greater jet and particle velocities than water jet, but also displays an equivalent jetting impact effect on the targeted wall. The liquid nitrogen jet can generate excellent acceleration effects on particles, and the maximum particle velocity increases with the in-crease of the nozzle pressure drop and nozzle diameter, but decreases with the increase of particle diameter. Confining pressure and initial particle velocity have little effect on particle acceleration, which can be neglected in the design of the ALNJ process.关键词
液氮/磨料射流/流场特性/颗粒加速Key words
liquid nitrogen/abrasive jet/flow behavior/particle acceleration分类
能源科技引用本文复制引用
黄中伟,蔡承政,李根生,田守嶒..液氮磨料射流流场特性及颗粒加速效果研究[J].中国石油大学学报（自然科学版）,2016,40(6):80-86,7.基金项目
国家自然科学基金项目(51374220,51604263) （51374220,51604263）
油气资源与探测国家重点实验室开放课题(PRP/open-1507) （PRP/open-1507）
中国博士后科学基金项目(2016M590523) （2016M590523）
