液态铅铋合金湍流普朗特数及RANS模型优选  

Optimization of Turbulent Prandtl Numbers and RANS Models for Liquid Lead-bismuth Eutectic

作　　者：邓诗雨 卢涛[1] 邓坚[2] 张喜林 朱大欢[2] Deng Shiyu;Lu Tao;Deng Jian;Zhang Xilin;Zhu Dahuan(School of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing,100029,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2023年第2期98-103,共6页Nuclear Power Engineering

基　　金：核反应堆系统设计技术重点实验室基金项目(HT-KFKT-24-2021013)。

摘　　要：工程上常采用RANS湍流模型进行热工水力相关的数值模拟,然而液态铅铋合金(LBE)具有独特的热物性,常规湍流普朗特数模型和RANS湍流模型对其流动与传热模拟的适用性有待研究。为更准确地描述绕丝燃料组件内LBE的流动与换热过程,本文基于大涡模拟对湍流普朗特数模型和RANS湍流模型进行优选。首先,采用四种湍流普朗特数模型对绕丝燃料组件内LBE的流动与传热过程进行大涡模拟,对比分析实验数据和模拟结果并进行模型优选。基于优选的湍流普朗特数模型,评价RANS湍流模型对LBE数值模拟的适用性和准确性。结果表明,Cheng湍流普朗特数模型和SST k-ω模型对LBE流动与传热模拟的准确性和适用性最高。In the engineering field,the RANS turbulence models are often used for thermal and hydraulic numerical simulation.However,the liquid lead-bismuth eutectic(LBE)has unique thermophysical properties,and the applicability of conventional turbulent Prandtl number models and RANS turbulence models to its flow and heat transfer simulation needs to be studied.In order to more accurately describe the flow and heat transfer process of LBE in wire-wrapped fuel assembly,the turbulent Prandtl number models and RANS turbulence models are optimized in this paper based on the large eddy simulation.First,four different turbulent Prandtl number models are used to carry out the large eddy simulation of the flow and heat transfer process of LBE in wire-wrapped fuel assembly,and the experimental data and simulation results are compared and analyzed to optimize these models.Then,based on the optimized turbulent Prandtl number model,the applicability and accuracy of the RANS turbulence models to the numerical simulation of LBE are evaluated.The results show that Cheng's turbulent Prandtl number model and SST k-ωmodel have the highest accuracy and applicability to the simulation of flow and heat transfer of LBE.

关 键 词：液态铅铋合金(LBE) 大涡模拟 湍流普朗特数模型 RANS湍流模型 绕丝燃料组件 

分 类 号：TL331[核科学技术—核技术及应用] TK124[动力工程及工程热物理—工程热物理]