Simulation on magnetic-thermal coupling of shielding sleeve for nuclear reactor coolant pump motor
In order to investigate the influence of shielding sleeve material and thickness on eddy cur-rent loss of shielding sleeve of nuclear reactor coolant pump motor,a 5.5 MW AP1000 nuclear reactor coolant pump(RCP)shielded induction motor was taken as the research object,and a two-dimensional electromagnetic model was developed using the low-frequency Maxwell simulation software to evaluate the eddy current loss across varying thicknesses of shielding sleeves composed of three ma-terials:Hastelloy-C,Inconel,and SUS316L.Based on the electromagnetic simulation results,the magnetic-thermal coupling framework was used to input the calculated eddy current loss value as the heat source into the cooling model of the nuclear reactor coolant pump motor shield sleeve,and the temperature and fluid flow fields were simulated using ANSYS Fluent software.The analysis reveals that Hastelloy-C exhibits the lowest eddy current losses for shielding sleeves of identical dimensions.For the same material,thinner sleeves reduce these losses.The temperature gradient from the inlet of the shielding sleeve gap flow cooling system to the shielding sleeve gap changes dramatically,with the sta-tor shielding sleeve consistently registering a higher temperature than the rotor shielding sleeve tempe-rature,resulting in a differential of approximately 20 ℃.The pressure distribution on the shielding sleeve is uneven,and the pressure gradually decreases along the axial flow direction,showing a de-crease of around 16.0 kPa.These research findings can provide critical insights for optimizing material selection and thickness design of shielding sleeves in nuclear RCP motors.
nuclear reactor coolant pump motorshielding sleeveeddy current lossmagnetic-thermal coupling simulation
万方数据
维普
