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[1]徐 高,顾阳晨,朱帜帆,等.预剪切对凝胶汽油雾化特性影响的实验研究[J].火箭推进,2018,44(04):47-53.
　XU Gao,GU Yangchen,ZHU Zhifan,et al.Experimental study on the effect of pre-shearing on atomization characteristics of gelled gasoline[J].Journal of Rocket Propulsion,2018,44(04):47-53.
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预剪切对凝胶汽油雾化特性影响的实验研究

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 44 期数: 2018年04期 页码: 47-53 栏目: 测控与试验 出版日期: 2018-08-31
Title:
Experimental study on the effect of pre-shearing on atomization characteristics of gelled gasoline
文章编号:
1672-9374(2018)04-0047-07
作者:
徐 高1; 顾阳晨1; 朱帜帆1; 翁春生2; 白桥栋2; 杨建鲁2
1. 南京理工大学 教育实验学院,江苏 南京 210094; 2. 南京理工大学 瞬态物理国家重点实验室,江苏 南京 210094
Author(s):
XU Gao1;  GU Yangchen1;  ZHU Zhifan1;  WENG Chunsheng2;  BAI Qiaodong2;  YANG Jianlu2
1. College of Elite Education, Nanjing University of Science & Technology, Nanjing 210094, China; 2. National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, China
关键词:
凝胶汽油;  预剪切;  撞击式雾化;  液滴粒径;  液滴速度
Keywords:
gelled gasoline;  pre-shearing;  impinging atomization;  droplet diameter;  droplet velocity
分类号:
V511
文献标志码:
A
摘要:
为研究预剪切对凝胶汽油雾化特性的影响,在已有的双股撞击式喷嘴雾化系统上设计并加装预剪切管。采用Malvern粒度仪和粒子图像速度仪(PIV)分别测量了凝胶汽油雾化场液滴的粒径和速度分布。结果表明,预剪切管对凝胶汽油的撞击式喷嘴雾化具有重要影响:一方面,预剪切管减小了凝胶汽油的表观粘度,利于雾化过程中液滴的破碎和剥离; 另一方面,预剪切管增大了流动阻力,导致凝胶汽油射流动能降低和雾化后的液滴速度降低,不利于雾化。合适的喉部长度与喉部直径能够有效降低雾化流场液滴索太尔平均直径。实验数据表明,加装喉部直径为3～4 mm,喉部长度为10～20 mm的预剪切管最有利于改善雾化效果。
Abstract:
In order to investigate the effect of pre-shearing on the atomization characteristics of gelled gasoline, a pre-shearing tube was designed and installed in an existing atomization system with dual impinging injectors. The droplet diameter distribution and velocity distribution of atomized gelled gasoline were measured by Malvern particle size analyzer and particle image velocity system(PIV), respectively. The experiment results show that the pre-shearing tube is of significant influence on the impinging atomization of gelled gasoline. Firstly, the pre-shearing tube reduces the apparent viscosity of gelled gasoline, which facilitates the droplet stripping and breaking during the atomization process. Secondly, the pre-shearing tube increases the flow resistance, decreasing the efflux kinetic energy of gelled gasoline and the atomized droplet velocity, which is not conductive to the atomization performance. In addition, a proper throat length and throat diameter can efficiently reduce the Sauter mean diameter of atomized droplet. The experimental data indicates that the pre-shearing tube with throat diameter of 3～4 mm and throat length of 10～20 mm is most beneficial for improving the atomization performance.

参考文献/References:

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备注/Memo

收稿日期:2017-07-12
基金项目: 南京理工大学本科生科研训练“百千万”计划立项资助(201610288076); 总装预研基金(61426040201162604002);
作者简介: 徐 高(1996—),男,学士,研究领域为凝胶推进剂的雾化与燃烧

更新日期/Last Update: 1900-01-01