Modelování přenosu tepla pod vodo-vzdušnými chladicími tryskami

Simulation of Heat Transfer Under Air-Water Cooling Jets

článek ve sborníku ve WoS nebo Scopus

en

The solidification and cooling of a continuously cast billet, slab or cylinder (generally a concasting) is a very complicated problem of 3-D transient heat and mass transfer. The solving of such a problem is impossible without numerical models of the temperature field. This paper is focused on the derivation of boundary conditions, i.e. the values of the heat transfer coefficient (HTC) on all CCM boundaries. The definition of boundary conditions is the most difficult part of the investigation of the thermokinetics of this process. The boundary conditions of the numerical model of the temperature field of the concasting are defined as the transfer of heat by convection. This HTC includes the so-called reduced convection coefficient corresponding to heat transfer by radiation. This paper therefore continues with a discussion on heat transfer coefficients under air-water cooling jets, which spray the concasting in the so-called secondary-cooling zone.

Řešení tuhnutí a chlazení kontinuálně odlévaných ocelových sochorů, bram a válců není možné bez numerického modelu teplotního pole. Příspěvek je zaměřen na odvození okrajových podmínek, tedy součinitele přestupu tepla, který je definován jako součinitel přenosu tepla vedením, zahrnujícím v sobě i vliv radiace.

The solidification and cooling of a continuously cast billet, slab or cylinder (generally a concasting) is a very complicated problem of 3-D transient heat and mass transfer. The solving of such a problem is impossible without numerical models of the temperature field. This paper is focused on the derivation of boundary conditions, i.e. the values of the heat transfer coefficient (HTC) on all CCM boundaries. The definition of boundary conditions is the most difficult part of the investigation of the thermokinetics of this process. The boundary conditions of the numerical model of the temperature field of the concasting are defined as the transfer of heat by convection. This HTC includes the so-called reduced convection coefficient corresponding to heat transfer by radiation. This paper therefore continues with a discussion on heat transfer coefficients under air-water cooling jets, which spray the concasting in the so-called secondary-cooling zone.

Kontinuální odlévání, okrajové podmínky, chladicí charakteristiky

Concast slab, boundary conditions, cooling characteristics

2012

25.04.2012

University of Žilina

Žilina

978-80-554-0516-2

XVIII. International Scientific Conference The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy 2012

1

128–135

8