聚变堆液态包层准二维磁流体湍流模型研究  

Research on quasi two-dimensional MHD turbulence model of liquid blanket in fusion reactor

作　　者：王磊 张秀杰[1] 潘传杰[1] 许增裕[1] 赵耀 王凡 WANG Lei;ZHANG Xiu-jie;PAN Chuan-jie;XU Zeng-yu;ZHAO Yao;WANG Fan(Southwestern Institute of Physics,Chengdu 610041)

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2021年第1期21-25,共5页Nuclear Fusion and Plasma Physics

基　　金：西物创新中坚人才项目(201901XWCXRC002);四川省科技计划(2019YJ0297)。

摘　　要：为研究聚变堆氚增殖包层中液态金属湍流磁流体动力学(MHD)效应,开发了一种新的准二维单方程MHD湍流模型,并进行了相关数值模拟程序的编制及验证。对于矩形管道中的准二维MHD湍流流动,三维流动主要发生在哈德曼层中,中心的主流区呈现出二维流动。为了反映这种特殊的流动特征,新湍流模型在标准k-ε模型的基础之上去掉了传统的耗散项,代之以电磁耗散项来模拟湍流MHD效应。同时,采用Bradshaw假设来对湍流涡粘系数进行模化。为验证该湍流模型是否合理,编制了相关数值模拟程序,并利用直接数值模拟(DNS)结果对该程序进行了校正,数值模拟结果与DNS结果吻合较好。计算结果表明,该湍流模型可应用于聚变堆液态包层MHD湍流流动的数值模拟。In order to study the turbulent magnetohydrodynamic(MHD)effect of liquid metal in the tritium breeder blanket of fusion reactor,a new quasi two-dimensional one equation MHD turbulence model is developed in this paper,and the relevant numerical simulation program is made and verified.For the quasi two-dimensional MHD turbulent flow in a rectangular tube,the three-dimensional flow mainly occurs in the Hartmann layers,and the main flow area in the center presents two-dimensional flow.In order to reflect this special flow feature,the new turbulence model removes the traditional dissipation term from the standard k-εmodel and instead uses the electromagnetic dissipation term to simulate the turbulent MHD effect.At the same time,Bradshaw hypothesis is used to model the turbulence eddy viscosity.In order to verify whether this turbulence model is reasonable,a numerical simulation program is made,and the program is corrected by using the results of direct numerical simulation(DNS).The results of numerical simulation are in good agreement with those of DNS.In general,the turbulence model can be applied to the numerical simulation of MHD turbulent flow in the liquid blanket of fusion reactor.

关 键 词：聚变堆 液态包层 磁流体流动 准二维湍流 不可压缩流动 

分 类 号：TL627[核科学技术—核技术及应用]