Erzeugung ablauffreier Tragkraftverteilungen beim induktiven Schwebeschmelzen elektrisch leitender Stoffe

根据dfg研究项目BA 3565/3-1框架内工作所获得的知识和经验，在本项目申请延期的一年时间内，计划完成以下工作和调查以及目标。基于商用软件ANSYS和FLUENT建立了电磁与流体动力学耦合三维瞬态数值模拟模型，并在前期研究的框架下进行了验证，研究并确定了适合的电气操作参数和以显著增加熔体质量为目标的增强型双频悬浮熔炼实验装置的结构设计。特别地，将研究悬浮熔体的动力学行为和过程稳定性。由于线圈和磁芯结构设计的适应性以及电气参数的适应性，熔化过程应达到很高的稳定性。对不加冷壁的第一步和加冷壁的第二步进行了数值模拟。根据数值模拟的结果，对现有的双频悬浮熔炼实验装置进行改造和改进，以提高待熔炼金属样品的质量。通过在项目延长框架内进行的实验研究，特别是对悬浮和熔化铝样品随质量增加的动态行为和过程稳定性的实际认识和了解将得到实现。试验研究分为第一步无冷壁试验和第二步有冷壁试验。最后，对新开发的大质量无浸漏悬浮熔炼方法在工业规模上的实际应用情况进行了评价和描述。

Based on the knowledge and experience achieved by the work done in the frame of the DFG-research project BA 3565/3-1 during the applied one year prolongation of this project the work and investigations as well as targets described as follows are planned to be done.Using a coupled electromagnetic and fluid-dynamic three-dimensional transient numerical simulation model based on commercial codes ANSYS and FLUENT, which has been verified in the frame of pre-investigations, the suitable electrical operation parameter und the constructive design of a enhanced two-frequency-levitation melting experimental set-up with a view on significant increasing of the melt-mass will be investigated and defined. In particular the dynamic behaviour and the process stability of the levitated melt-mass will be investigated. Due to the adaptation of the design of the coil and magnet core construction as well as the electrical parameter a high stability of the melting process should be achieved. The numerical simulation are carried out in the first step without and in the second step with the use of the cold-protection-wall.Based on the results carried out by the numerical simulation the existing two-frequency-levitation melting experimental set-up will be re-constructed and enhanced in this way, that the mass of the metal samples to be melted can be increased. With the experimental investigations to be carried out in the frame of project prolongation in particular practical cognition and know-ledge of the dynamic behaviour and process stability of the levitated and melted aluminium sample with increased mass will be achieved. The experimental investigations are carried out in the first step without and in the second step with the use of the cold-protection-wall. Finally, the realisation of the practical application in industrial scale of the new developed method for the dip- and leakage free levitation melting of bigger mass will be evaluated and described.