|Table of Contents|

Experimental study on the effect of pre-shearing on atomization characteristics of gelled gasoline(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2018年04期
Page:
47-53
Research Field:
测控与试验
Publishing date:

Info

Title:
Experimental study on the effect of pre-shearing on atomization characteristics of gelled gasoline
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
Keywords:
gelled gasoline;  pre-shearing;  impinging atomization;  droplet diameter;  droplet velocity
PACS:
V511
DOI:
-
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.

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