Trial Manufacture of Sheet Former for Molten metals by means of Electromagnetic Force

电磁力熔融金属板材成型机的试制

• 批准号: 63850039
• 负责人: YAMANE Ryuichiro
• 金额: $ 1.98万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63850039/
• 关键词: Fluid Engineerings; Magmetohydrodynamics; Magnetic Field; Molten Metal; Liquid Metal; Continuous Casting; Jet; Rivulet; 非接触形状制御

The apparatus for forming thin film flow of molten metals by means of electromagnetic field was devised. The shape of electrically conducting fluids under a magnetic field was studied by experiments with mercury and by an approximate analysis, and the following conclusions were obtained.1. Liquid Metal Jet Issuing from Noncircular Nozzles under a uniform Vertical Magnetic Field: The cross-sectional shape of the jet issuing from a noncircular nozzle oscillates along the streamwise direction. However, in the case with a uniform vertical magnetic field, this oscillation is highly suppressed.2. Liquid Metal Jet under a Nonuniform Vertical Magnetic Field: The magnetic field gradient changes the jet shape and acts no the jet like a solid wall, without coming into contact with the fluid. A jet is widened under a negative magnetic field gradient, while, a jet is changed in shape to be longer than it is wide under a positive one. When the nozzle is wide, the width change becomes larger; however, the thickness change is hardly affected by the initial width.3. Liquid Metal Rivulet under a Nonuniform Transverse Magnetic Field: Without a magnetic filed neither the width nor the thickness of the rivulet changed. When a nonuniform transverse magnetic field decreasing in the streamwise direction is applied to the rivulet, thickness decreases considerably along the flow, but the width increases. On the whole, the rivulet is flattened by the electromagnetic force. When a strong magnetic field is applied, disturbances on the free surface are damped out and the surface appearance of the rivulet is mirrorlike.4. Liquid Metal Jet Issuing from Electrically Conducting Nozzles under, a uniform Vertical Magnetic Field: In the case that liquid metal jet issues from an electrically conducting nozzle, the jet is stretched to the direction of the magnetic field.

设计了利用电磁场形成熔融金属薄膜流的装置。通过水银实验和近似分析研究了磁场下导电流体的形状，得到以下结论： 1．均匀垂直磁场下非圆形喷嘴喷出的液态金属射流：非圆形喷嘴喷出的射流截面形状沿流向振荡。然而，在均匀垂直磁场的情况下，这种振荡受到高度抑制。 2．非均匀垂直磁场下的液态金属射流：磁场梯度改变射流形状，并且使射流像固体壁一样起作用，而不与流体接触。在负磁场梯度下，射流变宽，而在正磁场梯度下，射流形状发生变化，长度大于宽度。当喷嘴较宽时，宽度变化变大；但厚度变化几乎不受初始宽度的影响。 3．非均匀横向磁场下的液态金属细流：没有磁场，细流的宽度和厚度都不会改变。当对小溪施加沿流向减小的不均匀横向磁场时，小溪的厚度沿流动方向显着减小，但宽度增加。总的来说，小溪被电磁力压扁了。当施加强磁场时，自由表面上的扰动被减弱，小溪的表面外观呈镜面状。4．在均匀垂直磁场下从导​​电喷嘴发出液态金属射流：在液态金属射流从导电喷嘴发出的情况下，射流被拉伸到磁场方向。

项目成果

Oshima, S., Katakura, H., and Yamane, R.: "Magnetic Shape-Control of a Liquid Metal Jet" Proceedings of 9th International Symposium on Jet Cutting Technology, Sendai, Japan (1988), pp. 459-478.

Oshima, S.、Katakura, H. 和 Yamane, R.：“液态金属射流的磁性形状控制”第九届国际射流切割技术研讨会论文集，日本仙台（1988 年），第 459-478 页。

Takayuki TORIKAI: "A Research on the Digital Hydraulic Positioning by Multi-cylinder Systems" 1st JHPS International Symposium on Flued Power. 467-474 (1988)

Takayuki TORIKAI：“多缸系统数字液压定位研究”第一届 JHPS 国际流体动力研讨会。

Oshima, S., and Yamane, R.: "Shape of a Liquid Metal Jet under a Uniform transverse magnetic field" Report of the ISIJ Meeting, (Current Advances in Materials and Processes, Vol. 1, No. 5 (1988) p.1383.

Oshima, S. 和 Yamane, R.：“均匀横向磁场下液态金属射流的形状”ISIJ 会议报告，（材料和工艺的最新进展，第 1 卷，第 5 期 (1988) p

Oshima, S., and Yamane, R.: "The Shape of a Liquid Metal Rivulet under a Nonuniform Transverse Magnetic Field" Experimental Thermal and Fluid Science, 2, 301-309, 1989.

Oshima, S. 和 Yamane, R.：“非均匀横向磁场下液态金属溪流的形状”实验热与流体科学，2, 301-309, 1989。

Shuzo OSHIMA: Experimental Heat and Transfer,Fluid Mechanics and Termodynamics. 749-756 (1988)

Shuzo OSHIMA：实验传热、流体力学和热力学。