Numerical simulation of liquid sheet breakup process and structures in gas-liquid pintle injector

被引：0
|
作者：
Lin W. [1 ]
Zheng S. [1 ]
Chai M. [1 ]
Sun Z. [1 ]
Jin T. [2 ]
机构：
[1] College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou
[2] School of Aeronautics and Astronautics, Zhejiang University, Hangzhou
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 03期
关键词：
adaptive mesh refinement; atomization mechanism; pintle injector; primary breakup process; vortex structure;
D O I：
10.13224/j.cnki.jasp.20210514
中图分类号：
学科分类号：
摘要：
Numerical simulations of the primary atomization in the gas-liquid pintle injector were conducted, using the VOF (volume of fraction) method with the adaptive mesh refinement to capture the gas-liquid interface. The realizable k-ε turbulence model was adopted for the turbulence modelling. The entire breakup process and the gas-liquid interaction at different instants were captured. The numerical results were qualitatively and quantitatively in good agreement with the high-speed photograph measurement results, which verified the accuracy of the numerical method. The breakup process and mechanism of the primary breakup and atomization were studied by analyzing the evolution of the gas-liquid interface, the vortex structure of the flow field and the velocity field in the pintle injector. The results showed that the formation of the liquid bridge was mainly caused by the expansion, stretching and coalescence of the liquid hole, while the droplet was mainly caused by the stretching of the central liquid sheet, the fractures of the liquid ligament and liquid bridge. The fracture and displacement of liquid sheet was mainly attributed to the vortex structure formed in the liquid sheet breaking stage. © 2023 BUAA Press. All rights reserved.
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页码：618 / 629
页数：11
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