电动燃油泵驱动电机浸油冷却性能数值模拟

为了研究电动燃油泵驱动电机浸油冷却性能，基于冷却流体及电机各部件3维模型，充分考虑各部件发热功率以及材 料属性等物理量的影响，采用有限体积法对电机流-热耦合场进行模拟仿真，分析不同边界条件对电机流场和温度场的影响。结 果表明：在最大冷却燃油流量以及电机最高功率下，流道的压力损失和电机的最高温度均能满足电动燃油泵的运行要求；随着冷 却流量增加或燃油粘度的增大，流道的压力损失增大，且在最大冷却流量下，燃油粘度每增大1 mm 2 /s，压力损失增大约2 kPa；电 机功率和入口温度对电机各部件温度的影响较大，各部件温升与燃油进口温度近似呈线性关系，而环境温度对电机温度场影响较 小。研究结果为电动燃油泵电机浸油冷却流道的设计与优化提供了理论依据。

Numerical Simulation of Oil Immersion Cooling Performance of Electric Fuel Pump Driving Motor

In order to study the oil immersion cooling performance of an electric fuel pump driving motor, based on the three- dimensional model of cooling fluid and various motor components, and by fully considering the influence of physical quantities such as heat? ing power and material properties of each component, the finite volume method was used to simulate the fluid-thermal coupling field of the electric fuel pump motor, and the influences of different boundary conditions on the motor flow field and temperature field were analyzed. The results show that the pressure loss of the flow channel and the maximum temperature of the motor can meet the operational require? ments of the electric fuel pump under the maximum cooling fuel flow rate and the motor''s maximum power. With the increase of cooling flow rate or fuel viscosity, the pressure loss of the flow channel increases, and at the maximum cooling flow, the pressure loss increases by about 2 kPa for every 1 mm 2 /s increase in fuel viscosity. The motor power and inlet temperature have a great influence on the temperature of each motor components, and the temperature rises of motor components are approximately in linear relations with the fuel inlet temperature, while the ambient temperature has little influence on the temperature field of the motor. The research results provide a theoretical basis for the design and optimization of the oil immersion cooling flow channel of electric fuel pump motors.