3-D temperature and stress distributions of strip in preheating furnace of continuous annealing line

The phenomenon of buckling is attributed to the non-uniform stress imposed on strip. This paper investigates the occurrence of this non-uniform by calculating the stress distribution in circumferential and axial direction. The results indicate that stress distribution is even in circumferential direction, and the non-uniform happens in the axial direction. Furthermore, this non-uniform is quiet related to the proportion of strip width and the roll flat part length. Meanwhile, the roll flat part length should as long as it could be in the context of insuring the enough centripetal force to prevent the snaking.

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“…And the distribution of pressures on the flat part is quite like a parabola. Coincidentally, this result is consistent with Chen's research [5] .…”

supporting

confidence: 93%

Stress Distribution of Strip at the Parts in Contact with Roll in Continuous Annealing Furnace

Xing

Wen

Dou

et al. 2011

AMR

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“…For Eqs. (1) to (5), ⃗ u is the velocity vector. P is the stress tensor, ⇀ F is the other mass force, qr is the source terms of the chemical reactions and other volumetric heat sources, T is the turbulent viscosity (Pas), G k is the term produced by shear force, G b is the term produced by volume force, and T , k , C 1 , and C 2 are all constants.…”

Section: Turbulence Modelmentioning

confidence: 99%

“…The results of the calculation are compared to the data from the production line. Chen [5] performed both the thermal and mechanical analyses by using the finite element code ANSYS to investigate the effects of heating conditions in the preheating furnace. The equivalent emission of radiation of the strip corresponding to the complicated furnace environment is evaluated inversely with the aid of strip temperature estimated by the energy balance model.…”

Section: Introductionmentioning

confidence: 99%

Heating and Flow Analysis in Hot‐Rolled Stainless Strip Continuous Annealing Furnace Based on CFD Modeling

2016

Heat Trans. Asian Res.

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A three-dimensional mathematical model was found for a continuous annealing furnace, the temperature field, and flow field of the furnace and the temperature of the stainless strip could be calculated by using this model. The simulation results were compared with measured data and the accuracy of the model was proved by the predicted temperature distribution. By using this model, the convective heat transfer coefficient and equivalent radiation heat transfer coefficient of the strip surface were also analyzed. C⃝ 2016 Wiley Periodicals, Inc. Heat Trans Asian Res, 46 (7): 924-932, 2017; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj).

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“…There are several references in the literature about furnace models: some of them require the use of FEM, which entails an increase in complexity and longer computational time in case of 3D [6], but can be simplified to 2D and used online [7]; others, based on neural networks [8,9], are used to monitor the performance of the furnace over time; and finally, there are some models including combustion [10,11] that fulfill control purposes with a certain degree of accuracy. There are some other examples of modelling of the complete furnace system, including the furnace rolls and the combustion process [6,[12][13][14][15], however, none of these different approaches use the radiant tube temperatures or the status of the radiant tubes as is proposed in the model presented in this paper.…”

Section: Introductionmentioning

confidence: 99%

Practical thermal model for a radiant tubes annealing furnace

Garcia-Martino

Prieto

2020

Metall. Res. Technol.

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Modeling of vertical radiant tube annealing furnaces has proven to be one of the best tools to improve the performance of a galvanizing line. However, there is a lack of a practical model able to consider the temperature and status of the radiant tubes, which are key elements in the capacity of the furnace. The model proposed divides the furnace in several segments and compares the radiated heat, that is exchanged between the radiant tubes and the strip, and the heat required to increase the temperature of the mass flow on the strip. This comparison is represented as an implicit equation where the strip's temperature is obtained by iteration. The model is validated calculating the final temperature of more than five hundred coils divided in four different steel families. The 90% of the calculated temperatures are within a 2% deviation range compared to the measured temperatures. This model combines good accuracy in the results with low computational times, allowing the simulation of hundreds of coils in a few minutes.

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3-D temperature and stress distributions of strip in preheating furnace of continuous annealing line

Cited by 17 publications

References 18 publications

Stress Distribution of Strip at the Parts in Contact with Roll in Continuous Annealing Furnace

Stress Distribution of Strip at the Parts in Contact with Roll in Continuous Annealing Furnace

Heating and Flow Analysis in Hot‐Rolled Stainless Strip Continuous Annealing Furnace Based on CFD Modeling

Practical thermal model for a radiant tubes annealing furnace

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