CAJ | 학술논문

为提高堆芯流量分配的精度，通过CFD数值模拟软件CFX ，应用标准 k-ε湍流模型及SIM PLE算法对中国实验快堆1型小栅板联箱、节流件及流量1区管脚的流量分配进行三维数值模拟。在已有研究基础上，模拟过程中考虑了材料的壁面效应对压降的影响，使模拟工况更接近实验真实情况。与已有实验结果进行对比时，考虑了重力压降、沿程压降及局部压降，对模拟结果进行了系统误差修正。由计算结果可知：节流件及小栅板联箱的压降计算结果与修正后的水力台架实验结果符合较好。在本文的管脚布置情况下，1、5、6号组件的平均流量比2、3、4、7号组件的平均流量低3.8％。根据模拟计算结果可更准确地预测堆内最热管的流量分配情况，可为今后的水力实验提供参考。
위제고퇴심류량분배적정도，통과CFD수치모의연건CFX ，응용표준 k-ε단류모형급SIM PLE산법대중국실험쾌퇴1형소책판련상、절류건급류량1구관각적류량분배진행삼유수치모의。재이유연구기출상，모의과정중고필료재료적벽면효응대압강적영향，사모의공황경접근실험진실정황。여이유실험결과진행대비시，고필료중력압강、연정압강급국부압강，대모의결과진행료계통오차수정。유계산결과가지：절류건급소책판련상적압강계산결과여수정후적수력태가실험결과부합교호。재본문적관각포치정황하，1、5、6호조건적평균류량비2、3、4、7호조건적평균류량저3.8％。근거모의계산결과가경준학지예측퇴내최열관적류량분배정황，가위금후적수력실험제공삼고。
In order to improve the precision of the reactor core flow distribution , the CFX code was used to simulate the three-dimensional flow through type-1 throttle structure ,throttle structure and flow 1 zone pin in China Experimental Fast Reactor based on standard k-εturbulence model and SIMPLE algorithm .The effect of the wall surface of the material on the pressure drop was taken into account during the simulation process in order to further approach the real situation in the experiment .The gravity pressure drop and pressure drop along the path as well as the local pressure drop were regarded as experimental system error correction when the numerical results were compared with the available experimental results .The results show that the simulation results and experimental results after reasonable correction are in good agreement .The average outlet flow in pin 1 ,5 and 6 is 3.8% lower than the average outlet flow in pin 2 ,3 ,4 and 7 .Not only the flow distribution in the hottest tube can be more accurately determined ,but also the reference for the future hydraulic bench test is figured out according to the simulation results .