Design and Analysis of Performance Parameters of the Cooling Fan Based on Computational Fluid Dynamics
Cooling fan is the most important part of the wheel side traction motor cooling system of the vehicles with electric drive wheel,and its performance has a direct impact on the cooling system.According to the structural characteristics of forced cooling system and the cooling demand of traction motor,the key parameters affecting the cooling air volume and pressure difference of fan were designed.On this basis,the flow field analysis model of the fan was built based on Computational Fluid Dynamics.Dif-ferent mesh sizes were selected for different areas by using the differentiated mesh generation technology.The static pressure field of the whole machine and the blade was analyzed,and the whole pressure field and the velocity field of the runner area were ana-lyzed.The key parameters were obtained and compared with the design values.The results show that:the flow field inside the fan is very complex,there are secondary flow and wake jet phenomenon in many places,but the flow trend is in line with the principle of hydrodynamics.The simulated flow rate is 3.86m3/s,and the error is 3.63%compared with the designed flow rate of 4m3/s.The error between the simulation power of 29.4kW and the design power of 29.92kW is 1.77%.The two results are consistent,which shows that the design and analysis results are reasonable.The results of parameter design calculation and flow field analy-sis are consistent,which can provide reference for the design of the same type of cooling fan.
Electric Wheel VehicleWheel MotorCooling FanComputational Fluid DynamicsFlow FieldModel
NETL
NSTL
万方数据
维普
