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利用数值方法求解了电子枪加热二维合金熔池的流体力学方程组 ,获得了熔池流场的速度、温度和浓度分布 .并且详细地研究了各种特征参量 (如雷诺数、普朗特数、格拉晓夫数和李斯特数 )对合金熔池流动特性的影响 ,一般地 ,雷诺数和普朗特数越小、而格拉晓夫数和李斯特数越大 ,则熔池中溶剂金属的蒸发速率就越大 .在此基础上提出参杂适当浓度的溶质金属可以提高某些难熔难挥发金属的蒸发速率 ,计算中对参杂了钨、钕、锡和铬等金属的钍、铂、铱和钌等合金熔池进行了数值分析 ,都相应提高了溶剂金属的蒸发速率
The fluid mechanics equations of the two-dimensional alloy molten pool heated by the electron gun were solved numerically, and the velocity, temperature and concentration distribution of the flow field in the molten pool were obtained. Various characteristic parameters (such as Reynolds number, Prandtl number , The number of Grashov and the number of Liszt) on the flow characteristics of the alloy bath, in general, the smaller the Reynolds number and Prandtl number, the greater the number of Grames and the number of Lister, then the solvent metal The higher the evaporation rate is, the more suitable concentration of solute metal is proposed to improve the evaporation rate of some difficult refractory metals, the calculation of thorium doped with tungsten, neodymium, tin, chromium and other metals, Platinum, iridium and ruthenium alloys such as the numerical analysis of molten pool, have increased the evaporation rate of the solvent metal