Research on the Impact of Variations in Vortex Strength Surrounding Motors on Surface Heat Dissipation
The influence of impeller hub with hole of the multi-blade centrifugal fan on the temperature rise of the range hood motor,and air volume,pressure of the fan is studied through CFD.The results show that the heat of the hub with hole is discharged from the front and back of the impeller,and mainly discharged from the back,but the heat of the hub without hole is discharged from the back.So the temperature rise of hub with hole is reduced by 2K compared the hub without hole.The air is flowing from the front of impeller to the back through the hole of hub which improves the vortex intensity around the motor and intensifies the heat transfer on the motor.The aerodynamic performance of the fan is improved in the full operation condition,the static pressure increased by 4％～20％and the efficiency increased by 5％～7.8％.In the maximum flow rate condition,the air goes through from back of impeller which rises the the flow rate and improves the heat dissipation efficiency of motor,the maximum air volume and maximum static pressure increase by 4％and 6％for the hub with hole.
Range HoodMulti-blade Centrifugal FanHub of ImpellerNumerical CalculationAerodynamic PerformanceTemperature Rise
万方数据
维普
