文献类型：期刊文献

中文题名：喷嘴内螺纹结构对射流破裂长度的影响

英文题名：Effects of Nozzle Screw Structure on Breakup Length of Jet

作者：刘禹[1];施浙杭[2];郝业峻[1];王子钰[1];赵辉[1];刘海峰[1]

机构：[1]华东理工大学上海煤气化工程技术研究中心,上海200237;[2]上海空间推进研究所,上海201112

年份：2022

卷号：48

期号：1

起止页码：19

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家重点研发计划(2018YFC0808500);国家自然科学基金(21878095)。

语种：中文

中文关键词：破裂长度;螺纹结构;螺纹深度;液体射流;喷嘴

外文关键词：breakup length;screw structure;thread depth;liquid jet;nozzle

摘要：使用高速相机研究了喷嘴螺纹结构对液体射流破裂长度的影响。采用5种不同直径(4.00、4.80、7.50、8.75、10.80 mm)的喷嘴进行实验,螺纹深度范围0.40~1.25 mm,液体射流雷诺数范围500~22600。实验结果表明:当雷诺数小于1600时,液体射流破裂长度随着雷诺数的增加而增加,喷嘴螺纹结构对液体射流破裂长度的影响较小;随着雷诺数的增加,液体射流破裂长度先增加后减小,喷嘴螺纹结构的影响显著,带螺纹结构喷嘴的液体射流破裂长度小于光滑喷嘴的液体射流破裂长度;当雷诺数大于7000时,液体射流破裂长度随着雷诺数的增加而增加,喷嘴螺纹结构继续促进液体射流破裂长度的减小;同时,实验结果还表明喷嘴螺纹结构对小直径(直径小于5 mm)喷嘴的影响更显著。最后,以量纲为一螺纹深度、雷诺数和韦伯数为参数建立了液体射流破裂长度预测关系式。
The effects of nozzle screw structure on liquid jet breakup were investigated with a high-speed camera.Five nozzles with different diameters(4.00,4.80,7.50,8.75,10.80 mm)were used in the experiment.The thread depth range was 0.40—1.25 mm,the liquid jet Reynolds number(Re)was within the scope of 500—22600,and the Weber number was within the scope of 0.0003—1.2000.The experimental results showed the screw structure had a strong disturbance to the jet and promoted the breakup of jet.By comparing the jet breakup length under different experimental conditions,it could be obtained that increasing Re led to the decrease of breakup length when Re<1600.The structure of nozzle screw had little influence on the breakup length of liquid jet.The breakup length of liquid jet increased first and then decreased with Re raised.In this condition,the influence of screw structure of nozzle was significant,the breakup length was shorter than that of the smooth one.When Re>7000,the breakup length of liquid jet rised with the increase of Re and the screw structure of nozzle continued to promote the decrease of the breakup length of liquid jet.The experimental results showed that the influence of nozzle screw structure on small diameter nozzle(diameter less than 5 mm)was more significant than that on the larger nozzle.By using dimensionless thread depth,Re and Weber number,the relationship for predicting the breakup length of liquid jet was established.