本研究提出在磁流体熔滴增材工艺中增加电磁搅拌环节，以促进 7075 铝合金熔滴增材的熔体成分均匀性和杂质气体排出。 通过数值模拟分析，系统考察了 3 种不同线圈绕组结构产生的搅拌磁场特性，基于坩埚内流场轨迹和流速分布选择出了最合适的电磁搅拌模型。 结果表明，当相位相同的绕组两两相邻，并随后根据相位差有序排列时，产生的行波磁场电磁搅拌模型更加适合熔滴增材工艺，其液态金属的流场轨迹线呈现完整的空间贯穿特性，且其搅拌强度最高。 并研究了电流幅值和电流频率对搅拌强度的影响，发现增加线圈电流幅值和频率均可以一定限度内提高搅拌强度。 模拟结果表明，最佳的线圈工艺参数为：电流幅值 300 A, 电流频率 5 Hz。

This work proposed a strategy in which an electromagnetic stirring process was added to magnetohydrodynamic molten metal droplet-based additive manufacturing to increase the melt composition uniformity and remove impurity gas. By numerical simulation analysis, the stirring magnetic field traits of three different types of coil winding configurations were systematically investigated, and the optimal electromagnetic stirring model was determined on the basis of the trajectories and velocity distributions of the flow field. The results show that when windings with the same phase are arranged adjacently in pairs and subsequently ordered according to phase differences, the resulting travelling wave magnetic field electromagnetic stirring model is more suitable for molten droplet additive manufacturing processes, as it exhibits complete spatial penetration characteristics in the molten metal flow field and provides the highest stirring intensity. The influence of the current amplitude and frequency on the stirring intensity was also investigated. Increasing the coil current amplitude and frequency can enhance the stirring intensity to a certain extent. The simulation results indicate that the optimal process parameters are a current amplitude of 300 A and a coil frequency of 5 Hz.