液-液针栓式喷注器膜束流动状态对雾化锥角的影响  

Effects of flowing status of liquid film and jet on spray angle of liquid-liquid pintle injector

作　　者：赵凡 张海滨[1] 赵亮[1] 白博峰[1] ZHAO Fan;ZHANG Haibin;ZHAO Liang;BAI Bofeng(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《推进技术》2025年第2期164-174,共11页Journal of Propulsion Technology

基　　金：国家自然科学基金(51876167)。

摘　　要：为揭示液-液针栓式喷注器膜束流动状态对雾化锥角的影响规律,本文通过精细设计喷注器结构与控制液束与液膜流动状态,采用可视化实验对针栓式喷注器喷注单元雾化锥角进行了测试分析。实验研究发现,除动量比之外,液束、液膜的流动状态(韦伯数)也对雾化锥角有较大影响。通过对实验结果分析,本文提出了表征液-液针栓喷注器液束/液膜撞击变形程度的函数模型,并将其作为修正因子对已有液-液针栓喷注单元雾化锥角预测模型进行了修正。在局部动量比0.55~5.13内,本文提出的雾化锥角修正模型的预测误差小于±5%(置信度91.46%),该模型实现了对液-液针栓喷注器喷注单元雾化锥角的准确预测。In order to reveal the effects of flowing status of liquid film and liquid jet on the spray angle of liquid-liquid pintle injector,a visualization experiment on the spray angle of the liquid-liquid pintle injector ele⁃ment was performed in the present study,and the experiment was carried out through precise design on the injec⁃tor structure and careful control on the flowing status of the liquid film and liquid jet.The experimental results in⁃dicated that the spray angles were not only influenced by the momentum ratio and but also the flow status of the liquid film and liquid jet(Weber number).Through the analyses on the obtained experimental results,a function was proposed to describe the degree of impinging deformation between the liquid film and liquid jet in the present study,and the established function was used for the modification of the existing prediction model.When the local momentum ratio ranges from 0.55 to 5.13,the prediction error of the modified model was less than±5%with a confidence level of 91.46%.The modified model realizes the accurate prediction on the spray angles of the liquidliquid pintle injector element.

关 键 词：液体火箭发动机 针栓喷注器 雾化锥角 动量比 撞击变形 韦伯数 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]