不同孔隙率CuW合金稳态渗流场的数值模拟

Numerical Simulation of Infiltration Flow Field of CuW Composite

基于Cu/W两相的不互溶性,熔渗法成为Cu W合金的主要制备技术之一。基于等温假设模拟了液态Cu在W骨架中的稳态渗流行为,研究了稳态浸渗过程中流场的演变规律。计算分析了W骨架孔隙内的压力分布、铜液的流动速度、铜液的运动轨迹以及压力演变。模拟结果显示:随着孔隙率的减小,Cu W60、Cu W70、Cu W80骨架的压力差减小;同时,毛细管当量半径减小、粘滞阻力系数与惯性阻力系数均增大,Cu液在W骨架中的浸渗难度增大。

Based on the non-compatibility of the phases Cu-W,infiltration method has become one of the main preparation techniques about the Cu W alloys. The steady infiltration behavior of melt copper into the tungsten skeleton of pore space under isothermal assumption is investigated numerically,and the evolution of steady infiltration is explained. The flow behaviors of the copper fluid,the flow speed and the pressure are calculated and analyzed to provide reference basis of improve and enhance the performance of Cu W alloys. The simulation results show: with the decrease of the porosity,the pressure difference of the W skeleton about Cu W60,Cu W70 and Cu W80 decrease; at the same time,the equivalent radius of the capillary decreases,while the viscous resistance and the inertial resistance increase,so the infiltration process of the Cu in W skeleton becomes difficult.