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[1]杨国华,张波涛,周立新,等.液气动量比对内混式直流气液喷嘴雾化特性影响[J].火箭推进,2019,45(05):66-73.
　YANG Guohua,ZHANG Botao,ZHOU Lixin,et al.Effects of momentum ratio on atomization characteristics of internal mixing gas-liquid injector[J].Journal of Rocket Propulsion,2019,45(05):66-73.
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液气动量比对内混式直流气液喷嘴雾化特性影响

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 45 期数: 2019年05期 页码: 66-73 栏目: 研究与设计 出版日期: 2019-10-30
Title:
Effects of momentum ratio on atomization characteristics of internal mixing gas-liquid injector
文章编号:
1672-9374(2019)05-0066-08
作者:
杨国华1; 2; 张波涛2; 周立新2; 王 凯2
(1.西北工业大学 航天学院 燃烧、热结构与内流场国家重点实验室,陕西 西安 710072;2.西安航天动力研究所 液体火箭发动机技术重点实验室,陕西 西安 710100)
Author(s):
YANG Guohua1; 2;  ZHANG Botao2;  ZHOU Lixin2;  WANG Kai2
(1.Science Technology on Combustion, Internal Flow and Thermal-structure Laboratory,Northwestern Polytechnical University,Xi’an 710072, China; 2.Science and Technology on Liquid Rocket Engines Laboratory,Xi’an Aerospace Propulsion Institute, Xi’an 710100,
关键词:
内混式直流气液喷嘴;  雾化;  自适应加密;  Gerris
Keywords:
internal mixing gas-liquid injector;  atomization;  adaptive mesh refinement;  Gerris
分类号:
V430.34
文献标志码:
A
摘要:
为探究液气动量比对内混式直流气液喷嘴雾化特性的影响,采用基于Gerris的VOF方法和自适应加密算法,对不同液气动量比下的两液相孔内混式直流气液喷嘴雾化过程进行数值计算。结果表明:Gerris可以清晰地捕捉到射流柱从变形、弯曲到雾化为液滴的全过程细节特征,雾化过程图像与实验拍摄的基本吻合,获得液滴空间分布,计算得到的全场液滴SMD为50～60 μm。当液气动量比较小时,内混式直流气液喷嘴的射流不发生相撞,雾化机制为气动破碎。随着液气动量比的增加,两股射流破碎长度和穿透深度均增大,射流发生相撞,雾化机制为气动破碎和撞击破碎。
Abstract:
In order to research the effects of liquid-gas momentum ratio on atomization characteristics of internal mixing gas-liquid injector, the internal mixing gas liquid injector with two jet holes was numerically computed under various liquid-gas momentum ratio by the VOF method and adaptive mesh refinement algorithm based on Gerris.The results show that the characteristics of the whole spray process are captured accurately in Gerris, which consists of column distortion,bending and disintegrating into droplets.The computational results are basically in good agreement with the breakup process images in experiment.The spatial distributions of droplets were obtained and the droplets SMD of full flow field is 50～60 μm.When liquid-gas momentum ratio is small, the liquid jets of internal mixing gas liquid injector do not collide with each other, and the atomization mechanism is pneumatic atomization.With the increase of the liquid-gas momentum ratio, two liquid jets’ breakup length and penetration depth are increased, and liquid jets collide, at that time atomization mechanism is pneumatic atomization and impact atomization.

参考文献/References:

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备注/Memo

收稿日期:2018-11-21; 修回日期:2019-01-16基金项目:国家重大基础研究项目( 613193)作者简介:杨国华(1979—),男,博士,研究员,研究领域为液体火箭发动机喷雾燃烧技术

更新日期/Last Update: 2019-10-25