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[1]孙靖阳,毛红威,马原,等.燃气发生器头腔吹除乳化过程压降特性及出流均匀性数值研究[J].火箭推进,2024,50(03):108-117.[doi:10.3969/j.issn.1672-9374.2024.03.012]
　SUN Jingyang,MAO Hongwei,MA Yuan,et al.Numerical study on liquid-gas emulsification process and flow uniformity in gas generator injector[J].Journal of Rocket Propulsion,2024,50(03):108-117.[doi:10.3969/j.issn.1672-9374.2024.03.012]
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燃气发生器头腔吹除乳化过程压降特性及出流均匀性数值研究

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 50 期数: 2024年03期 页码: 108-117 栏目: 目次 出版日期: 2024-06-25
Title:
Numerical study on liquid-gas emulsification process and flow uniformity in gas generator injector
文章编号:
1672-9374(2024)03-0108-10
作者:
孙靖阳1; 2; 毛红威1; 3; 马原4; 厉彦忠4
1.西安交通大学 航空动力系统与等离子体技术全国重点实验室,陕西 西安 710149; 2.西安交通大学 未来技术学院,陕西 西安 710149,西安; 3.西安交通大学 机械工程学院,陕西 西安 710149; 4.西安交通大学 能源与动力工程学院,陕西 西安 710149
Author(s):
SUN Jingyang1; 2;  MAO Hongwei1; 3;  MA Yuan4;  LI Yanzhong4
1.National Key Laboratory of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University,Xi'an 710049, China; 2. School of Future Technology, Xi'an Jiaotong University, Xi'an 710149, China; 3. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710149, China; 4. School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710149, China
关键词:
气体吹除乳化;  燃气发生器;  气液两相流;  压降特性拟合
Keywords:
gas emulsification;  gas generator;  liquid-gas flow;  fitted laws of pressure drop
分类号:
TK49
DOI:
10.3969/j.issn.1672-9374.2024.03.012
文献标志码:
A
摘要:
气体吹除乳化技术可以大幅提高燃料流经燃气发生器时产生的压降,从而满足变工况下燃料的雾化及燃烧需求。目前气体吹除后燃气发生器内压降变化的定量规律还不清晰,为此,采用数值模拟的方法,对某型号燃气发生器全域及局部喷嘴进行了变工况计算,得到了氮气吹除过程中燃气发生器内煤油的相、速度以及压力分布规律,并针对喷嘴处的单相流及多相流压降特性进行拟合分析。结果显示:不同喷嘴处的煤油相分布具有不均匀性,喷嘴间流量差距可达66%; 使用氮气吹除后的喷嘴处压降相较于煤油单相流可提升1.64倍以上,且喷嘴处的气体单相流压降特性系数随背压呈现线性变化规律,而煤油单相流阻力系数则与流量呈现幂函数规律; 基于马尔基涅利公式提出了燃气发生器喷嘴处压降特性的集总参数模型,与数值计算结果及实验结果的平均误差为3.93%,具有较好的预测性。
Abstract:
The gas and emulsification technology can significantly increase the pressure drop when the fuel flows through the gas generator, so the atomization and combustion requirements of the fuel can be satisfied under variable working conditions. However, there is still a lack of quantitative research on the changing law of pressure drop in the process. In this paper, the CFD(Computational Fluid Dynamics)method was used to calculate the whole field and local nozzles of a certain type of gas generator under variable working conditions, the phase, velocity and pressure distribution laws of kerosene in the gas generator during the nitrogen blowing process were obtained. The flow and multiphase flow pressure drop characteristics were fitted and analyzed. The results show that the distribution of kerosene phase at different nozzles is not uniform, and the flow rate difference between nozzles can be up to 66%; the pressure drop at the nozzles after nitrogen blowing can be improved by more than 1.64 times compared with the single-phase flow of kerosene; the pressure drop resistance coefficient of the gas single-phase flow at the nozzle shows a linear change with the back pressure, while the kerosene single-phase flow pressure drop resistance coefficient shows an exponential law with the flow rate. The mathematical model of the pressure drop characteristics at the gas generator nozzle based on the Marchinelli formula has an average error of 3.93% with the numerical calculation results, which has good predictability.

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备注/Memo

收稿日期:2024- 03- 20修回日期:2024- 05- 09
基金项目:国家自然科学基金青年项目(51906194); 国家自然科学基金面上项目(51876153)
作者简介:孙靖阳(1998—),男,博士,研究领域为液体火箭低温推进剂热管理。
通信作者:毛红威(1993—),男,助理教授,博士,研究领域为液体火箭低温推进剂两相流动传热。

更新日期/Last Update: 1900-01-01