燃料元件热机械接触耦合问题的解决方案

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI:10.1134/S0021894424020081

M. P. Galanin, A. S. Rodin

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引用次数: 0

摘要

在轴对称计算中，考虑了燃料元件区域的数学模拟问题，包括许多燃料颗粒和包层碎片。假定包层是热弹性塑性体，燃料芯块是热弹性体，并考虑到材料的开裂。畴分解法的不同变体用于数值模拟颗粒之间以及颗粒与包层之间的热接触和机械接触。计算结果显示，包含十个燃料芯块的区域达到了额定功率，并估算了燃料芯块开裂对燃料元件热机械状态的影响。

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SOLUTION TO A COUPLED PROBLEM OF THERMOMECHANICAL CONTACT OF FUEL ELEMENTS

A problem of mathematical simulation of a fuel element region, including many fuel pellets and a cladding fragment, is considered in an axisymmetric formulation. It is assumed that the cladding is a thermoelastic-plastic body and that the pellet is a thermoelastic body with account for cracking of the material. Different variants of the domain decomposition method are used to numerically simulate the thermal and mechanical contact of pellets with each other and with the cladding. Calculation results are presented, in which the region containing ten pellets reaches a nominal power and the effect of pellet cracking on the thermomechanical state of the fuel element is estimated.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.