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利用获得的相似准则,采用相似物理模拟方法,研究离心铸造过程中液态金属在微尺度空间内的充型流动规律。结果表明:在微尺度条件下,模拟流体优先充填横截面积最大的流道,当转速提高到964 r/min时,才会同时充填0.1 mm的微流道;在充型流动过程中,流体总能量保持不变,流体的自由液面是以转轴为圆心的规则圆弧面;充型速度随时间的增加而增大,迅速达到一个极值,然后随着时间的增加,变化逐渐趋于平缓,同时随着转速的增加充型速度达到峰值的时间也会极剧缩短。
Using the similarity criterion obtained, the similar physical simulation method was used to study the filling flow of liquid metal in microscale space during centrifugal casting. The results show that under the condition of micro-scale, the simulation fluid preferentially fills the flow channel with the largest cross-sectional area. When the rotational speed increases to 964 r / min, the micro-fluid channel of 0.1 mm will be filled at the same time. The total energy remains the same, the free fluid surface is a circular arc centered on the axis of rotation. The filling speed increases with time and reaches an extreme rapidly, and then changes gradually with the increase of time Flat, at the same time as the speed increase filling speed of the peak time will also extremely shortened.