TED-AJ03-513 THE NUMERICAL AND EXPERIMENTAL INVESTIGATION OF A CONCASTING PROCESS

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概要

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• The solidification and cooling of a concasting and the simultaneous heating of the mold is, from the viewpoint of thermokinetics, a very complicated problem of transient heat and mass transfer. This process is described by the Fourier-Kirchhoff equation and, in the mold, by the Fourier equation. Investigation of such a problem is practically impossible without the numerical simulation of the temperature field not only of the concasting itself, while it is being processed through the caster, but of the mold as well. This paper introduces a three-dimensional (3D) numerical model of the temperature field of a solidifying concasting. The model used is able is simulate the temperature field of a concasting machine (caster) as a whole, or any of its parts. It is also able to solve current thermokinetic problems-both globally and in detail. Experimental research and measuring must be conducted simultaneously with the numerical computation. This investigation was focused mainly on determining the temperature in the tundish, the temperatures of the walls of the mold, the surface temperatures within the tertiary-cooling zone (using thermocouples), the surface temperatures of the slab under the mold (using pyrometers), and also on determining the metallurgical length of the concast slab using radio-isotope methods. The cooling intensity of individual cooling jets had to be conducted on an experimental laboratory simulator, since it is impossible to measure temperatures beneath the surface of a slab passing through a real caster. Each jet was measured separately on the a plate-model, on which the hot surface of the slab, which is cooled by a moving jet, can be modeled. The temperatures, measured beneath the surface of the modeling plate by means of thermocouples, are converted to cooling intensities using an inverse task, which, in turn, are converted to the courses of the heat transfer coefficients using an expanded numerical model. This laboratory facility is also capable of measuring the effect of radiation, which is dependent not only on the surface temperature but also on the actual quality of the surface. Experimental research and measurement must take place, not only to challenge the numerical model, but also to enhance it throughout the course of the process. The similarity of the results attained from the computed, and from the experimentally measured, temperature field of the steel slab is very satisfactory.

• 一般社団法人日本機械学会の論文

著者

• Heger Jaromir

  Alstom Power Technology Centre Cambridge Road

• STETINA Josef

  Faculty of Mechanical Engineering, Brno University of Technology

• KAVICKA Frantisek

  Brno University of Technology

• RAMIK Pavel

  Brno University of Technology

• DOBROVSKA Jana

  VSB-Technical University of Ostrava

• SEKANINA Bohumil

  Brno University of Technology

• Stetina Josef

  Faculty Of Mechanical Engineering Brno University Of Technology

関連論文

• TED-AJ03-513 THE NUMERICAL AND EXPERIMENTAL INVESTIGATION OF A CONCASTING PROCESS

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