Study on the impacts of pressure equalization slots on MHD flow and safety of FCI in DCLL blanket
Study on the impacts of pressure equalization slots on MHD flow and safety of FCI in DCLL blanket
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DCLL覆盖层均压槽对FCI MHD流动及安全性的影响研究
DOI：
10.1016/j.fusengdes.2017.08.016
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发表时间：
2017-11
影响因子：
1.7
通讯作者：
Zhang Nian-Mei
中科院分区：
文献类型：
--
作者：
Chen Long;Xu Shi-Jing;Li Ming-Jian;Ni Ming-Jiu;Zhang Nian-Mei
针对双铅锂包层，提出了均压槽的设计方法，以减小流道嵌件内外区域的压差，从而减小流道嵌件内的应力。本文采用CFD和有限元耦合计算平台，对DCLL包层中的磁-热-流体-结构多物理场进行了直接模拟，研究了FCI包层的压力场、速度场、温度场以及变形和应力。在非结构同位网格上，采用相容守恒格式和PISO方法求解了包含Lorentz力的不可压Navier-Stokes方程。采用有限元法研究了FCI结构的热应变和热应力。结果表明：（1）插入低电导率和低热导率的FCI，可以降低MHD压降，提高传热效率;（2）PES对压力均衡没有显着贡献。（3）对于PES，虽然液态金属出口温度降低，但传热效率提高，第一壁面最高温度（FW）和跨壁温差减小。
For a Dual Coolant Lead Lithium (DCLL) blanket, in order to reduce the pressure difference between inner and outer area of flow channel insert (FCI), which accounts for the stresses in FCI, the pressure equalization slots (PES) are proposed. In the present work, we aim at performing a direct simulation of the magneto-thermal-fluid–structure multi-physical fields in the DCLL blanket, with PES or not, by a coupled computing platform including CFD and the finite element method (FEM), to study the pressure field, velocity field, temperature field and deformation and stresses of FCI. A consistent and conservative scheme and PISO method on an unstructured collocated mesh are employed to solve the incompressible Navier–Stokes equations with the Lorentz force included. The FEM is applied to investigate the thermal strains and stresses of FCI structure. The results show that: (1) inserting FCI with low electrical conductivity and low thermal conductivity, the MHD pressure drop can be reduced and the heat transfer efficiency can be improved; (2) PES does not contribute significantly to pressure equalization. In addition, for case with PES, some potential structural failures and other problems would be caused, such as stress concentration; (3) for the case with PES, although the exit temperature of liquid metal is decreased, the heat transfer efficiency is increased and the max temperature of the first wall (FW) and the temperature difference across FCI wall are decreased.
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影响因子：
1.7
作者：
D. Sutevski;S. Smolentsev;M. Abdou
通讯作者：
D. Sutevski;S. Smolentsev;M. Abdou
影响因子：
0.9
作者：
S. Smolentsev;N. Morley;M. Abdou
通讯作者：
S. Smolentsev;N. Morley;M. Abdou
影响因子：
3.7
作者：
U. Schumann
通讯作者：
U. Schumann
DOI：
10.2172/212580
发表时间：
1995-06
期刊：
--
影响因子：
--
作者：
R. Alcouffe;Randal S. Baker;Forrest W. Brinkley;R. Douglas;O’Dell;Wallace F. Walters
通讯作者：
R. Alcouffe;Randal S. Baker;Forrest W. Brinkley;R. Douglas;O’Dell;Wallace F. Walters
影响因子：
0.9
作者：
Abdou, M;Sze, D;Malang, S
通讯作者：
Malang, S