原子能科学技术2016，Vol.50Issue(9)：1592-1599,8.DOI:10.7538/yzk.2016.50.09.1592
采用 FFT 方法对横摇条件下堆芯核热耦合流动不稳定性的分析
Analysis of Neutronic/Thermal-hydraulic Coupling Flow Instability in Reactor Core under Rolling Condition Using FFT Method
摘要
Abstract
Based on the developed neutronic/thermal‐hydraulic coupling flow instability code for reactor cores under ocean conditions ,the fast Fourier transformation (FFT ) method was used to analyze oscillation curves of reactor core channels ,and spectrum characteristics of reactor core channels occurring flow instability under static and rolling conditions were obtained .The results show that one spectrum peak can be found when the flow instability happens under static conditions ,and the corresponding spectrum is called inherent spectrum .For the flow instability occurred under rolling conditions ,all channels of the reactor core are affected by both rolling conditions and neutronic/ther‐mal‐hydraulic coupling effect , and the inherent spectrum is dominant in the highest power channels which means that the flow instability is firstly induced in those chan‐nels .T he characteristics of the complicated oscillation curves of mass flow rate can be analyzed precisely by FFT method to estimate whether the neutronic/thermal‐hydraulic coupling flow instability under rolling conditions occurs .关键词
横摇条件/核热耦合/流动不稳定性/FFT方法Key words
rolling condition/neutronic/thermal-hydraulic coupling/flow instability/FFT method分类
能源科技引用本文复制引用
鲁晓东,陈炳德,王艳林,彭传新,昝元锋,黄彦平..采用 FFT 方法对横摇条件下堆芯核热耦合流动不稳定性的分析[J].原子能科学技术,2016,50(9):1592-1599,8.基金项目
863计划资助项目（2012AA050906）；国家青年杰出科学基金资助项目 （）
