叶片包角对螺旋离心式燃油泵空化性能影响  

Influence of Blade Wrap Angle on Cavitation Performance of Spiral Centrifugal Fuel Pump

作　　者：刘晓超 韩伟[1,2] 李仁年 邱伊宁[1] 周畅 LIU Xiao-chao;HAN Wei;LI Ren-nian;QIU Yi-ning;ZHOU Chang(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and Systems,Gansu Province,Lanzhou 730050,China)

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]甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《液压气动与密封》2022年第9期75-81,共7页Hydraulics Pneumatics & Seals

基　　金：国家重点研发计划项目(2018YFB0606100);国家自然科学基金资助项目(51669012)。

摘　　要：为探究叶片包角对螺旋离心式燃油泵空化性能的影响,以某型号航空燃油泵作为研究对象,自主设计了190°、220°、250°、280°、310°、340°、370°、400°叶片包角燃油泵,采用数值模拟以及试验的方法得到燃油泵的空化性能。结果表明:燃油泵的效率与叶片包角呈二次函数关系,叶片包角为370°时燃油泵效率最高;燃油泵的泵空化余量与叶片包角呈三次函数关系,叶轮包角为400°时燃油泵的泵空化余量最小;以叶片进口边向叶轮进口延伸的方式来增加长叶片包角,可增加叶轮内相同位置的压力,抑制空化的发展阶段,提高燃油泵的空化性能;大包角燃油泵内发生空化的面积小,气泡聚集程度低,对燃油泵外特性影响低,空化性能高。In order to explore the influence of the blade wrap angle on the cavitation performance of the spiral centrifugal fuel pump,a certain type of aviation fuel pump was used as the research object,and the 190°,220°,250°,280°,310°,340°,370°,400°blade wrap angle fuel pump was independently designed,and numerical simulation and test methods were adopted.Obtain the cavitation performance of the fuel pump.The results show that the efficiency of the fuel pump has a quadratic function relationship with the blade wrap angle,and the fuel pump has the highest efficiency when the blade wrap angle is 370°;the pump cavitation margin of the fuel pump has a cubic function relationship with the blade wrap angle,and the impeller wrap angle is the cavitation margin of the fuel pump is the smallest at 400°;increasing the wrap angle of the long blades by extending the blade inlet to the impeller inlet can increase the pressure at the same position in the impeller,inhibit the development stage of cavitation,and improve the fuel pump s performance cavitation performance;The area where cavitation occurs in the large wrap angle fuel pump is small,the degree of bubble accumulation is low,the effect on the external characteristics of the fuel pump is low,and the cavitation performance is high.

关 键 词：螺旋离心式燃油泵 包角 空化性能 数值模拟 

分 类 号：TH137[机械工程—机械制造及自动化] TH311