Topology optimization design and steady-state thermal analysis of fusion reactor divertor

doi:10.3785/j.issn.1006-754X.2023.00.065

Chin J Eng Design

2023, Vol. 30

Issue (5): 601-607 DOI: 10.3785/j.issn.1006-754X.2023.00.065

Mechanical Optimization Design

Topology optimization design and steady-state thermal analysis of fusion reactor divertor

Xiaoqiang ZHANG¹(

),Biwei LU^1,²,Jiaqin LIU^3,⁴,Yucheng WU^1,^4,⁵(

)

^1.School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
^2.Hefei Zhongke Chongming Technology Co. , Ltd. , Hefei 230000, China
^3.Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China
^4.National and Local Joint Engineering Research Center for Nonferrous Metal and Processing Technology, Hefei University of Technology, Hefei 230009, China
^5.Advanced Energy and Environmental Materials International Science and Technology Cooperation Base, Hefei University of Technology, Hefei 230009, China

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Abstract

In order to improve the cooling capacity of the divertor in fusion reactor and meet the requirements of its high temperature service performance, based on the integrated additive manufacturing technology, the topology optimization design and model reconstruction for the W/Cu module in divertor were carried out by using variable density method with the design goal of maximizing heat transfer. Meanwhile, the finite element numerical simulation and the calculation of temperature field and stress field for the W/Cu module after topology optimization were carried out by using large commercial simulation software. The results showed that under the condition of 10 MW/m² steady-state heat flux density, the maximum temperature of the W/Cu module after topology optimization was reduced by nearly 108.5 ℃, to only 512.3 ℃; the maximum interface stress of the W/Cu module was reduced by nearly 264.2 MPa, to only 486.5 MPa, which indicated that the stress distribution was significantly improved; the total deformation and elastic strain of the W/Cu module were greatly reduced. The application of the topology optimization structure can greatly improve the feasibility of integrated additive manufacturing of divertors with low cost, high efficiency and high reliability.

Key words： fusion reactor divertor additive manufacturing W/Cu module topology optimization steady-state thermal analysis

Received: 01 March 2023 Published: 03 November 2023

CLC:

TL 62+6

Corresponding Authors: Yucheng WU E-mail: 2021110271@mail.hfut.edu.cn;ycwu@hfut.edu.cn

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Cite this article:

Xiaoqiang ZHANG,Biwei LU,Jiaqin LIU,Yucheng WU. Topology optimization design and steady-state thermal analysis of fusion reactor divertor. Chin J Eng Design, 2023, 30(5): 601-607.

URL:

https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2023.00.065 OR https://www.zjujournals.com/gcsjxb/Y2023/V30/I5/601

聚变堆偏滤器拓扑优化设计与稳态热分析

为了提高聚变堆偏滤器的冷却能力，以满足其高温服役性能需求，基于一体化增材制造技术，以换热量最大为设计目标，采用变密度法对偏滤器中的W/Cu模块进行拓扑优化设计和模型重构，并采用大型商用仿真软件对拓扑优化后的W/Cu模块进行有限元数值模拟及温度场、应力场计算。结果表明，在10 MW/m²稳态热流密度条件下，拓扑优化后W/Cu模块的最高温度降低了108.5 ℃，仅为512.3 ℃；W/Cu模块界面处的最大热应力下降了264.2 MPa，仅为486.5 MPa，说明应力分布得到明显改善；W/Cu模块的总变形和弹性应变均大幅减小。该拓扑优化结构的应用可大大提升聚变堆偏滤器实现低成本、高效率、高可靠性的一体化增材制造的可行性。

关键词： 聚变堆, 偏滤器, 增材制造, W/Cu模块, 拓扑优化, 稳态热分析

Fig.1 Flat-type W/Cu module

Fig.2 Design model of W/Cu module flow channel structure

Fig.3 Optimization iteration curve for objective function value and volume fraction of W/Cu module flow channel

Fig.4 Topology optimization process of W/Cu module flow channel

Fig.5 Smooth processing of W/Cu module flow channel topology optimization results

Fig.6 Geometric reconstruction of W/Cu module flow channel topology optimization model

Fig.7 3D physical models of W/Cu module before and after topology optimization

Table 1 Basic physical parameters of W and Cu materials

Fig.8 Temperature distribution cloud map and convective heat transfer coefficient of W/Cu module

Fig.9 Temperature distribution cloud maps of W/Cu module under steady-state heat flux density of 10 MW/m²

Table 2 Structure analysis results of W/Cu module under steady-state heat flux density of 10 MW/m²

Fig.10 Stress distribution cloud maps of W/Cu module under steady-state heat flux density of 10 MW/m²


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