航空燃油系统双层方孔滤网过滤特性研究  

Research on the Filtering Characteristics of Double-layer Square Hole Filter in Aviation Fuel System

作　　者：冀宏[1,2] 何志冬 刘新强 阎洛鸥[1,2] 袁林 JI Hong;HE Zhidong;LIU Xinqiang;YAN Luoou;YUAN Lin(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;Key Laboratory of Special Pump Valves and Flow Control Systems of the Ministry of Education,Lanzhou,Gansu 730050;AECC Power Control Technology Co.,Ltd.,Guiyang,Guizhou 550009)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]特种泵阀及流控系统教育部重点实验室,甘肃兰州730050 [3]中国航发动力控制科技有限责任公司,贵州贵阳550009

出　　处：《液压与气动》2024年第11期122-130,共9页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52075233);甘肃省自然科学基金(22JR5RA248)。

摘　　要：双层方孔滤网作为航空燃油系统主要抗污元件,其过滤特性对航空燃油系统的可靠性具有重要影响。综合运用CFD-DEM耦合方法与可视化试验,研究方孔双层滤网动态过滤过程和流速、流量脉动对滤网过滤效率的影响。结果表明:受支撑网的影响,双层滤网精度提高,表面介质过滤和小于网孔颗粒成群卡滞网孔是滤网过滤初期的主要存在形式,滤网过滤中期逐渐形成颗粒层;流速对滤网过滤影响较小,敏感颗粒的过滤效率出现轻微波动,流量脉动对滤网过滤效率影响显著,脉动频率和幅值越大,滤网过滤效率越低;研究结果为方孔滤网的设计选型提供了有益的参考。As the main anti-fouling component of the aviation fuel system,the filtering characteristics of the double-layer square hole filter has an important impact on the reliability of the aviation fuel system.The CFD-DEM coupling method and visualization test are used to study the dynamic filtration process of the square-hole double-layer filter and the effects of flow rate and flow pulsation on the filtration efficiency of the filter.The results show that the accuracy of the double-layer filter is improved due to the influence of the supporting mesh.The surface medium filtration and the group of particles smaller than the mesh are the main forms of mesh blockage in the early stage of filter filtration.In the middle stage of filter filtration,a particle layer gradually forms.The flow rate has little effect on the filtration of the filter,and there is a slight fluctuation in the filtration efficiency of sensitive particles.The flow pulsation has a significant impact on the filtration efficiency of the filter.The larger the pulsation frequency and amplitude,the lower the filtration efficiency of the filter.The research results provide useful references for the design and selection of square hole filters.

关 键 词：航空燃油系统 双层滤网 过滤特性 可视化 CFD-DEM 

分 类 号：TH137[机械工程—机械制造及自动化]