Simulation analysis of the influence
of tungsten layer thickness on thermal damage of outer horizontal target plate
of EAST lower divertor

doi:10.16568/j.0254-6086.202502005

Nuclear Fusion and Plasma Physics ›› 2025, Vol. 45 ›› Issue (2): 156-161.DOI: 10.16568/j.0254-6086.202502005

• Nuclear Fusion Engineering • Previous Articles Next Articles

Simulation analysis of the influence of tungsten layer thickness on thermal damage of outer horizontal target plate of EAST lower divertor

QI Kun-yu^{1, 2}, CAO Lei², YAO Da-mao^{1, 2}

(1. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026; 2. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)

Received:2023-05-09 Revised:2023-09-04 Online:2025-06-15 Published:2025-06-13
Contact: 曹磊(1971-)，安徽合肥人，副研究员，主要从事聚变堆面向等离子体部件设计。

钨层厚度对EAST下偏滤器外水平靶板热损伤影响的仿真分析

齐坤宇^{1, 2}，曹磊^*2，姚达毛^{1, 2}

(1. 中国科学技术大学核科学技术学院，合肥 230026；2. 中国科学院等离子体物理研究所，合肥 230031)

作者简介:齐坤宇(1999-)，男，河北石家庄人，硕士研究生，主要从事聚变堆面向等离子部件设计。
基金资助:
中国聚变技术计划综合研究设施(2018-000052-73-01-001228)

Abstract

Abstract:

Based on the COMSOL Multiphsics platform, the steady-state thermal stress/strain simulation and plastic strain accumulation simulation under cyclic thermal load were carried out for the tungsten-copper flat-type structure of the outer horizontal target plate of EAST lower divertor by using the finite element method. It was found that during the cyclic thermal loading process, compared to tungsten and CuCrZr alloy, the copper layer undergoes faster and deeper cumulative plastic strain, and forms a cumulative difference with other metals at the interface. In severe cases, it will cause interface detachment; the thickness of the tungsten layer obviously affects the stress peak value of the W-Cu interface and the life of the Cu-CuCrZr interface. The design of the tungsten layer thickness should comprehensively consider the size of each component of the plate structure to extend the service life of the divertor as much as possible.

Key words: Divertor outer target plate, W/Cu flat-type component, Finite element analysis, Accumulated plastic strain, Tungsten layer thickness design

摘要：

基于COMSOL Mulitiphsics平台，用有限元法对在高热负荷工况下EAST下偏滤器钨铜平板结构进行了稳态热应力/应变仿真以及循环热负载下的塑性应变累积的分析。研究发现，在循环热负载过程中，相比钨和铬锆铜合金，铜过渡层会发生更快、程度更深的累积塑性应变，并在界面处与其他金属形成累积应变差异，严重时将导致界面脱粘；钨层厚度明显影响钨-铜界面的应力峰值和铜-铬锆铜界面寿命，在钨层厚度设计时应综合考虑平板结构各个部件的尺寸的影响以尽可能延长偏滤器使用寿命。

关键词: 偏滤器外靶板, 平板钨铜部件, 有限元分析, 累积塑性应变, 钨层厚度设计

CLC Number:

TB753

QI Kun-yu, CAO Lei, YAO Da-mao. Simulation analysis of the influence of tungsten layer thickness on thermal damage of outer horizontal target plate of EAST lower divertor[J]. Nuclear Fusion and Plasma Physics, 2025, 45(2): 156-161.

齐坤宇, 曹磊, 姚达毛. 钨层厚度对EAST下偏滤器外水平靶板热损伤影响的仿真分析[J]. 核工业西南物理研究院, 2025, 45(2): 156-161.

Simulation analysis of the influence of tungsten layer thickness on thermal damage of outer horizontal target plate of EAST lower divertor

钨层厚度对EAST下偏滤器外水平靶板热损伤影响的仿真分析

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