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[1]王壮,党枭睿,胡海峰,等.缩进长度对液液同轴离心喷嘴雾化过程的影响[J].火箭推进,2024,50(03):42-52.[doi:10.3969/j.issn.1672-9374.2024.03.005]
　WANG Zhuang,DANG Xiaorui,HU Haifeng,et al.Effect of indentation length of liquid-liquid coaxial swirling injector on spray process[J].Journal of Rocket Propulsion,2024,50(03):42-52.[doi:10.3969/j.issn.1672-9374.2024.03.005]
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缩进长度对液液同轴离心喷嘴雾化过程的影响

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 50 期数: 2024年03期 页码: 42-52 栏目: 目次 出版日期: 2024-06-25
Title:
Effect of indentation length of liquid-liquid coaxial swirling injector on spray process
文章编号:
1672-9374(2024)03-0042-11
作者:
王壮1; 党枭睿2; 胡海峰1; 卞香港1
1.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; 2.西安航天动力研究所,陕西 西安 710100
Author(s):
WANG Zhuang1;  DANG Xiaorui2;  HU Haifeng1;  BIAN Xianggang1
1.Science and Technology on Liquid Rocket Engine Laboratory,Xi'an Aerospace Propulsion Institute, Xi'an 710100, China; 2.Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
关键词:
缩进数;  液液同轴离心喷嘴;  雾化锥角;  流场结构;  数值模拟
Keywords:
indentation length;  liquid-liquid coaxial swirling injector;  spray angle;  flow field struture;  numerical simulation
分类号:
V231.2
DOI:
10.3969/j.issn.1672-9374.2024.03.005
文献标志码:
A
摘要:
为探究缩进长度对液液同轴离心喷嘴雾化锥角的影响,中心喷嘴工质采用N2O4,外喷嘴工质采用偏二甲肼(UDMH),通过数值仿真获得了喷嘴内部流场的细节特征以及缩进数N对喷嘴雾化锥角的影响规律。结果表明:当N<1时,喷嘴的雾化锥角呈现先增后减的趋势; 当N>1时,喷嘴的雾化锥角略微增大; 当N=0时,UDMH与N2O4液膜之间会形成低压区,使得UDMH液膜张角减小,N2O4液膜张角变大,并在液膜末端贴合在一起,最终雾化锥角为外喷嘴与中心喷嘴雾化锥角的中间值; 当N>0.85时,UDMH与N2O4会在缩进室内部发生明显的掺混,液膜变形程度加剧; 当N>1.27时,缩进室会对内部混合流体起到整流作用,从而使其雾化距离增加。
Abstract:
In order to investigate the effect of indentation length of liquid-liquid coaxial swirling inject on spray process, the detailed characteristics of the internal flow was obtained through numerical simulation, using N2O4 as the working fluid for the central nozzle and UDMH as the working fluid for the outer nozzle. Besides, the effect of the N on the spray angle was obtained. The result shows that when N<1, the spray angle increase at first and then decrease. When N>1, the spray angle increases slightly. In addition, when N=0, a low-pressure area will be formed between UDMH and N2O4 liquid film, which will make the two liquid films adsorb each other, resulting in a decrease in UDMH liquid film angle and an increase in N2O4 liquid film. And the final spray angle is an intermediate value between the outer nozzle and the central nozzle spray angle. When N>0.85, UDMH and N2O4 will mix significantly in the indentation chamber, and the deformation of the liquid film intensifies. When N>1.27, the chamber will rectify the mixed fluid, and thus the breaking distance increases.

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备注/Memo

收稿日期:2023- 09- 10修回日期:2023- 10- 26
作者简介:王壮(1995—),男,硕士,研究领域为液体火箭发动机流动、传热与燃烧。
引用格式:王壮,党枭睿,胡海峰,等.缩进长度对液液同轴离心喷嘴雾化过程的影响[J].火箭推进,2024,50(3):42-52.

更新日期/Last Update: 1900-01-01