水力发电学报2024，Vol.43Issue(10)：53-62,10.DOI:10.11660/slfdxb.20241005
屏蔽电机内冷却循环流场及水力损失数值研究
Numerical study on circulating flows and hydraulic losses in canned motor
摘要
Abstract
In this work,a RNG k-ε turbulence model is used to simulate the flows inside a canned motor,and flows in its stator section are calculated using a porous media model and the Ergun equation.We construct a theoretical model for hydraulic loss analysis based on energy conservation,and use it to reveal the time evolution of the motor's hydraulic loss.Flow patterns are analyzed in details.The results show that spiral flow patterns occur in the gap between the rotor and porous medium,and the impacting water flow forms multiple axisymmetric vortices in this gap,which are attributed to the larger resistance in the porous medium.Near the thrust bearing,some axisymmetric vortices similar to the blade flow are located at its radial flow channel inlet,and high-vorticity circulating flows develop in the flow outside of it.These findings suggest a complex geometric structure may result in more vortices and cause a significant hydraulic loss,especially between the thrust bearings and sliding bearings.This study would be a useful reference for optimizing the geometric parameters and structure of related motors.关键词
多孔介质流/水力损失/漩涡/推力轴承/屏蔽电机Key words
porous media flow/hydraulic loss/vortex/thrust bearing/canned motor分类
动力与电气工程引用本文复制引用
郭苗,刘宇,唐学林,刘树红,左志钢,李小芹..屏蔽电机内冷却循环流场及水力损失数值研究[J].水力发电学报,2024,43(10):53-62,10.基金项目
国家自然科学基金项目(52279084 （）
51909132) （）
中央高校基金项目(2024MS065) （2024MS065）
