微型高速燃油泵非定常流动及振动特性  

Unsteady flow and vibration characteristics in micro high-speed fuel pump

作　　者：王维军 代勇波 谭向军 吴大转[2] 王立闻 陈东 WANG Weijun;DAI Yongbo;TAN Xiangjun;WU Dazhuan;WANG Liwen;CHEN Dong(AVIC Chengdu Caic Electronics Co.,Ltd.,Chengdu,Sichuan 610091,China;College of Energy Engineering,Zhejiang University,Hangzhou,Zhejiang 310000,China;DEC Academy of Science and Technology Co.,Ltd.,Chengdu,Sichuan 611731,China;Aviation Military Representative Office of Aviation Military Representative Bureau of Army Equipment Department in Chengdu,Chengdu,Sichuan 610091,China)

机构地区：[1]中航工业成都凯天电子股份有限公司,四川成都610091 [2]浙江大学能源工程学院,浙江杭州310000 [3]东方电气集团科学技术研究院有限公司,四川成都611731 [4]陆军装备部航空军事代表局驻成都地区航空军事代表室,四川成都610091

出　　处：《排灌机械工程学报》2023年第11期1096-1103,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：流体机械及工程四川省重点实验室(西华大学)开放课题项目(szjj2019-029);成都凯天电子股份有限公司预研项目(Y2049,Y2173,Y2202)。

摘　　要：以某微型高速燃油泵三维模型为研究对象,采用SST k-ω湍流模型、PCB 352C33型加速度传感器和DASP-V11采集与实时分析软件,基于数值计算与试验手段分别获得了定常工况下燃油泵内部压力、速度、湍动能及非定常工况下燃油泵径向力、轴向力、监测点压力脉动及3个轴向X,Y,Z的振动加速度值,并采用快速傅里叶变换得到监测点与3个轴向的频域图.研究结果表明:采用SST k-ω湍流模型及叶片表面加密的数值求解结果与试验结果相吻合,叶片表面Y^(+)为0~2.00,蜗壳壁面Y^(+)为0.03~25.58;与常规离心泵一样,小流量工况下,燃油泵叶轮与蜗壳中存在明显的流动分离与湍动能耗散区;非定常流动中,燃油泵径向力在X,Y方向的分量没有明显的周期性,而轴向力的周期性与叶片数相等;蜗壳、叶轮动静干涉区的监测点呈明显的周期性,压力脉动幅值在叶频960 Hz,而振动脉动幅值在2倍叶频1 920 Hz,Z轴的振动幅值均高于其他2个轴向.研究结果可为高速燃油泵非定常流动设计优化提供一定的参考依据.A three-dimensional model of a micro high-speed fuel pump was taken as the research object,the SST k-ωturbulence model,PCB 352C33 acceleration sensor and analysis software(DASP-V11)were used as the analysis tool.Based on numerical calculation and experimental methods,the internal pressure,velocity,turbulent kinetic energy under steady conditions,radial force,axial force,pressure pulsation at monitoring points and vibration acceleration in X,Y and Z-axis were obtained respectively.The frequency domain diagram of monitoring points and three axes were obtained by fast Fourier transform.The results show that the numerical results of SST k-ωturbulence model and blade surface densification are consistent with the experimental results.The Y^(+)of blade surface is 0-2.00 and the Y^(+)of the volute wall is 0.03-25.58.Like the conventional centrifugal pumps,there is an obvious flow separation and turbulent energy dissipation areas in the impeller and volute under the condition of small flow rate.In unsteady flow,the components of radial force in X and Y directions have no obvious periodicity,while the periodicity of axial force is equal to the number of blades.The monitoring points in the rotor-stator interaction area of the volute and impeller show obvious periodicity.The pressure fluctuation amplitude is 960 Hz at the blade frequency,while the vibration amplitude of vibration artery is 1920 Hz.The vibration amplitude of Z-axis is higher than that of the other two axes.The research results provide a theoretical basis for the optimization design of unsteady flow in high-speed fuel pump.

关 键 词：燃油泵 非定常流动 径向力 轴向力 压力脉动 振动 快速傅里叶变换 

分 类 号：TH311[机械工程—机械制造及自动化] S277.9[农业科学—农业水土工程]