摘要
为研究屏蔽式核主泵进出口的压力脉动特征,应用数值模拟的方法,采用分离涡模型,分析了其时域特征和频域特征,得到了进出口处的压力脉动特性。结果表明,入口处的压力脉动呈现出明显的周期性,主要由转轮叶频决定,并且进口管道中心的脉动幅度小于管道两侧的脉动幅值。出口处的压力脉动频率比入口处的压力脉动频率复杂,包含叶频、叶频倍频、轴频和轴频半频,这是因为出口的脉动由动静叶片的干涉、导叶内的回流、蜗壳内流体的脱流作用造成。
Canned nuclear coolant pump is welded to the steam generator and main pipe line. The pressure fluctuation generated in the pump may affect both the steam generator and main pipe line. Purpose： The research was conducted for the purpose of studying the characteristics of pressure fluctuation at inlet and outlet of the nuclear coolant pump. Methods： The frequency spectra of pressure signal located at inlet and outlet of the nuclear coolant pump were obtained with CFD （Computational Fluid Dynamics）. Results： The result showed that the pressure fluctuation of the inlet position was dominated by the blade passing frequency, and the pressure fluctuation of the outlet position was much more complex. It was influenced by not only the blade passing frequency but also the axis frequency. The counter-flow in the diffuser and flow separation also influenced the outlet pressure fluctuation. Conclusion： CFD is suitable for canned nuclear coolant pump pressure fluctuation analysis.
出处
《核技术》
CAS
CSCD
北大核心
2013年第11期59-65,共7页
Nuclear Techniques
基金
中国博士后基金(2013M531173)资助
关键词
屏蔽式核主泵
分离涡模拟
压力脉动
频域分析
Canned nuclear coolant pump, DES （detached eddy simulation）, Pressure fluctuation, Frequency-domain analysis
