Coupled electromechanical and electrothermal problems in continuous casting

连铸机电和电热耦合问题

• 批准号: 92-2008
• 负责人: Lavers, JohnDouglas
• 金额: $ 2.19万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=419185
• 关键词: Coupled; electromechanical; electrothermal; problems; continuous

This research is concerned with the design and development of next-generation electromagnetic stirring equipment for the continuous casting of very high quality steel. This will require the development of a sophisticated mathematical model since the proposed equipment does not, and cannot, completely exist on the laboratory scale. The proposed equipment will consist of multiple, high power, coils designed to produce a rotating magnetic field that interacts with high velocity molten steel that is continuously poured into a water cooled, open bottom, copper mold. The purpose of the magnetic field is to exert forces on the molten steel and cause it to rotate within and below the mold. The motion of the molten metal, particularly along the solid/liquid solidification front, will act to significantly improve the quality of the solidified product. This specific modeling goal is challenging in that it encompasses state-of-the-art methodologies taken from widely disparate fields Specifically, the electromagnetic fields are 3-dimensional, time varying in a complex fashion, and are modified by the motion of the molten metal. Additionally, the flow of the molten metal in the casting system is highly turbulent and prone to pulsations that cause instabilities at the free surface of the molten steel in the casting mold. The first objective of this research is to understand, describe and electromagnetically control the flow pulsations so that the molten steel free surface can be stabilized. The second objective is to develop electromagnetic means of increasing the amount of turbulence in certain critical regions such that the quality of the solidified steel will be significantly improved.

本研究旨在设计和开发新一代的电磁搅拌设备，用于高质量钢的连铸。 这将需要开发一个复杂的数学模型，因为拟议的设备没有，也不可能完全存在于实验室规模。 拟议的设备将由多个高功率线圈组成，旨在产生旋转磁场，该磁场与高速钢水相互作用，该高速钢水连续倒入水冷、底部敞开的铜模中。 磁场的目的是对钢水施加力，使其在结晶器内和结晶器下方旋转。 熔融金属的运动，特别是沿着固体/液体固化前沿的运动，将起到显著提高固化产品的质量的作用。 这个特定的建模目标是具有挑战性的，因为它包括从广泛不同的领域采取的最先进的方法。具体地说，电磁场是三维的，以复杂的方式随时间变化，并通过熔融金属的运动进行修改。 此外，铸造系统中的熔融金属的流动是高度湍流的，并且易于发生脉动，这导致铸模中的熔融钢的自由表面处的不稳定性。 本研究的第一个目的是了解、描述和电磁控制流动脉动，以稳定钢液自由表面。 第二个目标是开发电磁装置，以增加某些关键区域中的湍流量，从而显著提高凝固钢的质量。