摘要
利用非定常雷诺平均纳维斯托克斯模拟(URANS)和大涡模拟(LES)对带分裂式交混叶片定位格架5×5棒束通道流动特性进行了研究。数值计算中建模考虑了格架条带、交混叶片等几何结构对流场的影响,并将模拟结果与MATiS-H基准实验进行了对比。结果表明,URANS与LES均能较好地模拟格架下游3个流速分量时均值;对于格架下游流速分量脉动值,URANS中非定常SST k–ω模型几乎不能够模拟出流速脉动值,非定常RSM模型对于流速脉动值模拟比实验值偏低。与URANS相比,LES能相对较为准确地模拟流速脉动值,然而LES对格架附近流速脉动值模拟结果与MATiS-H基准实验相比仍然偏低。
Unsteady Reyolds Average Navier-Stokes Simulation (URANS)and Large Eddy Simulation (LES)are used to study the flow field of 5×5 rod bundles with split-type spacers.An entire geometry of spacers,including grid straps and split-type vane,is simulated,and the results are compared to the experimental results of MATiS-H.The results show that URANS and LES can predict the averaged value of components of velocity,though there is a little difference between simulations and experiment.For RMS value of components of velocity,Unsteady SST k-ω (URANS)solution cannot reproduce the pulsation of components of velocity and the pulsation of components of velocity is under predicted by Unsteady RSM (URANS).The result of pulsation of components of velocity can be reproduced by LES while it is under predicted.
作者
王宁波
肖泽军
周磊
昝元峰
闫晓
Wang Ningbo;Xiao Zejun;Zhou Lei;Zan Yuanfeng;Yan Xiao(CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology,Nuclear Power Institute of China,Chengdu,610213,China;Hualong Pressurized Water Reactor Technology Corporation,Ltd.,Beijing,100037,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2018年第6期1-4,共4页
Nuclear Power Engineering
基金
国家自然科学基金项目(11575169)
作者简介
王宁波(1993-),男,研究实习员,现从事反应堆燃料组件实验研究与计算分析工作.
