流体机械2024，Vol.52Issue(12)：16-22,7.DOI:10.3969/j.issn.1005-0329.2024.12.003
空化射流喷嘴性能分析与试验研究
Performance analysis and experimental study of cavitation jet nozzles
摘要
Abstract
In order to enhance the impact effect of cavitation jet,the impact performance of cavitation nozzle jet was studied by using the method of combining numerical simulation and experimental research.The cavitation impact effect of conical nozzle,contraction and expansion nozzle,Helmholtz nozzle and organ pipe nozzle was compared,and the impact of impact standoff distance on the impact performance of nozzle was deeply studied.The results show that the cavitation bubbles generated in the nozzle will go through three stages:initial,development and collapse.The cavitation bubbles are initially generated in the nozzle,and finally develop to the limit state in the external flow field,and then collapse near the impact target,thus producing a strong impact force.Compared with conical nozzle,contraction and expansion nozzle and Helmholtz nozzle,organ pipe nozzle has the best cavitation impact effect.Under the same working conditions,the time for the organ pipe nozzle to penetrate the sleeve is the shortest,and the impact time is shortened by 90%compared to the conical nozzle.The size of the impact hole formed is expanded by 80%compared to the conical nozzle;The impact standoff distance has a significant impact on the impact performance of nozzle cavitation.Within a certain range,with the increase of the impact standoff distance,the impact performance of cavitation jet shows a trend of first increasing and then decreasing.Compared to the impact standoff distance of 5 mm,the sleeve piercing time of the organ pipe nozzle is shortened by 41.4%when the impact standoff distance is 10 mm.The results of this study can provide a theoretical basis for the application of cavitation jets.关键词
空化喷嘴/喷嘴结构/计算流体力学/射流参数/冲击试验Key words
cavitation nozzle/nozzle structure/computational fluid dynamics/jet parameters/impact experiment分类
机械制造引用本文复制引用
杜卫刚,孟翔,徐浩磊,葛家旺,季鹏,关利永,庞振力,杨硕..空化射流喷嘴性能分析与试验研究[J].流体机械,2024,52(12):16-22,7.基金项目
国家自然科学基金面上项目(52171287) （52171287）
中国石油天然气集团有限公司科学研究与技术开发项目(2021DJ4902) （2021DJ4902）
山东省自然科学基金面上项目(ZR2023ME022,ZR2022ME106) （ZR2023ME022,ZR2022ME106）
