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本文结合CFD与FEM方法,对国际热核聚变实验堆(ITER)的双冷锂铅(DCLL)包层进行了“磁-热-流-固”多物理耦合场的三维数值模拟.基于电势方法,采用PISO算法和相容守恒格式求解了包含Lorentz力的不可压Navier-Stokes方程。应用有限元方法分析了DCLL包层关键部件流道插件(FCI)在热场和磁场耦合作用下的热应力.利用多物理场的顺序耦合算法获得了在强磁场作用下,包层内金属流体的压力、速度和温度分布,研究了各种厚度和导电率的FCI对于包层内MHD效应和传热性能的影响。
In this paper, a three-dimensional numerical simulation of the “magnetocaloric-thermal-fluid-solid” multi-physics coupled field of double cold lithium-lead (DCLL) cladding of ITER was carried out based on CFD and FEM methods. Potential method, the incompressible Navier-Stokes equations with Lorentz force are solved using the PISO algorithm and the consistent conservation scheme. The thermal stress of flow channel insert (FCI), a key component of DCLL cladding, was analyzed by using the finite element method. The thermal field and magnetic field were used to couple the thermal stress with the magnetic field. Under the action of strong magnetic field, Pressure, velocity and temperature distribution, the effects of various thicknesses and conductivities of FCI on the MHD effect and heat transfer performance in the cladding were investigated.