摘要
核主泵屏蔽电机是核电站核岛一次回路系统的重要组成部分,而屏蔽电机内部的冷却水的流动状态直接影响电机内的热量传递的效果。对此建立了一种屏蔽电机整机的三维流场模型。基于计算流体力学理论中的有限体积法,利用Ansys Fluent软件,以实验得到的额定工况时的一次水流速为边界条件,反演计算出屏蔽电机内部的流场速度分布。针对结果分别对屏蔽电机内的关键部位的三维流场进行了分析,得出屏蔽电机内部的轴向及径向速度分布规律。计算结果表明,在靠近旋转壁面处,水速较大,且沿轴向以螺旋线形式向上流动,在下飞轮、屏蔽套间隙流体沿径向速度梯度较大。该研究可为后续的温度场研究提供不同位置处速度分布和数值。
The canned primary pump motor is an important part of a loop system of the nuclear island in nuclear power stations,while the flow states of the cooling water inside the canned motor directly affect the heat transfer within the motor.Consequently,a three dimensional model of flow field of the whole motor was established.Based on the finite volume method in the computational fluid dynamics theory,the velocity distribution in canned motor was calculated under boundary condition of the velocity inlet of primary water at the rated working point using the Ansys Fluent software.The axial and radial velocity distribution inside the canned motor was obtained by respectively analyzing the flow field of key parts of the canned motor.The results show that,near the rotating wall surface,the water with high velocity flow upward along the axial direction in the form of the spiral line.In the flywheel and the shielding clearance,the fluid velocity along the radial velocity gradient is larger.The research can provide the velocity magnitude and distribution in different locations for the followed temperature field investigation.
作者
李藏雪
赵博敏
路义萍
吕向平
LI Cang-xue ZHAO Bo-min LU Yi-ping LV Xiang-ping(Harbin Electric Machinery Company Limited, Harbin of Heilongjiang Prov. 150066,China School of Mechanical ＆ Power Engineering, Harbin University of Science and Technology, Harbin of Heilongjlang Prov. 150080,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2016年第4期533-538,共6页
Nuclear Science and Engineering
基金
国家科技重大专项(2013ZX06002002)
关键词
屏蔽电机
三维流场
有限体积法
计算流体力学
The canned motor
Three dimensional flow field
Finite volume method
Computational Fluid Dynamics
