摘要
为了准确计算核主泵叶轮在液体环境下的振动模态以确保核主泵的高可靠运行,主要研究真实运行工况下的水域边界效应,以及高温高压环境对核主泵叶轮模态产生的影响.首先对简化的圆盘模型进行了模态分析,研究发现圆盘各阶湿模态频率与干模态频率相比均下降25%左右,圆盘模态的数值结果与试验结果吻合,通过了圆盘试验的验证.继而以CAP1400核主泵叶轮缩尺水力模型为对象,分别研究了水域下潜深度和径向距离对叶轮模态特性的影响,以及实际运行工况的高温高压环境对叶轮模态特性的影响.结果表明:核主泵叶轮湿模态固有频率相比干模态有显著下降;叶轮的固有频率随下潜深度的增加而逐渐下降,随径向距离的增加而逐渐上升;核主泵叶轮高温高压环境的固有频率相比常温常压固有频率有所增加.
The reactor coolant pump runs as the only rotating part in nuclear power plant primary circuit system,and its operating environment is of liquid environment.In order to accurately calculate the vibration mode of the reactor coolant pump impeller in the liquid environment to ensure the high reliability of the reactor coolant pump,the influence of water boundary effect and high temperature and pressure environment on the reactor coolant pump impeller mode under real operating conditions was studied.The simplified disk model was analyzed firstly,and results show that the wet mode frequency of each stage of the disk is about 25%lower than the dry mode frequency,and numerical results of the disk mode are in agreement with the experimental results and are verified by disk experiments successfully.Then CAP1400 reactor coolant pump impeller reduced-scale hydraulic model was taken to study the influence of dive depth and radial distance and high temperature and pressure on the impeller modal characteristics.Results show that the impeller wet mode frequency decreases significantly compared with the dry mode.Natural frequency decreases with the increase of dive depth and increases with the increase of radial distance.The impeller natural frequency at high temperature and pressure has increased compared with that at normal temperature and pressure.
作者
王明杨
王晓放
周路圣
何曦
辛建池
WANG Mingyang;WANG Xiaofang;ZHOU Lusheng;HE Xi;XIN Jianchi(School of Energy and Power Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2019年第8期668-672,698,共6页
Journal of Drainage and Irrigation Machinery Engineering
基金
973计划项目(2015CB057301)
辽宁重大装备制造协同创新中心资助项目
关键词
核主泵
圆盘
湿模态
边界效应
高温高压
reactor coolant pump
disk
wet mode
boundary effect
high temperature and pressure
