Modeling effects of skid buttons and dislocated skids on the heating quality of slabs in an industrial walking-beam reheating furnace

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2023-09-01 DOI:10.1016/j.ijheatmasstransfer.2023.124245

Jianxiang Xu , Baokuan Li , Fengsheng Qi , Wenjie Rong , Shibo Kuang

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引用次数: 1

Abstract

The slab heating process inside a walking-beam reheating furnace is critical for slab quality. This paper presents a comprehensive CFD model simulating the fuel combustion, flow field, temperature distribution, and heating process of walking slabs in an industrial-scale furnace. It explicitly considers the effects of dislocated skids and skid buttons. After the model validation through industrial measurements, the model is used to analyze the influences of skid buttons and dislocated skids on the flow and temperature field and the slab heating process. The results show that the dislocated skids and skid buttons significantly affect the flow field and furnace temperature distribution. The simplifications on the structures of skid buttons and dislocated skids cause the neglect of shielding radiation of skids in the modeling. Overcoming this problem by the present model reduces the difference between the measured and predicted slab temperature by more than 20 K. Overall, the skid buttons reduce the sheltered area for slab heating by 86%, and the dislocated skids change the sheltered region of the slabs. These together favor a more uniform temperature of slabs. The results suggest that the CFD model can offer convenience to understanding, designing, controlling, and optimizing the slab heating process in a walking-beam reheating furnace.

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工业步进梁式加热炉滑块按钮和滑块错位对板坯加热质量的建模影响

步进梁式加热炉内板坯加热工艺对板坯质量至关重要。本文建立了一个全面的CFD模型，模拟了工业规模加热炉中行走板的燃料燃烧、流场、温度分布和加热过程。它明确地考虑了脱位滑块和滑块按钮的影响。通过工业实测对模型进行验证后，利用该模型分析了滑扣和脱位滑块对板坯流动场、温度场及加热过程的影响。结果表明，脱位的滑块和滑块按钮对流场和炉温分布有显著影响。由于对滑扣和脱位滑块结构的简化，导致建模中忽略了滑块的屏蔽辐射。该模型克服了这一问题，使实际板坯温度与预测板坯温度之间的差异减小了20 K以上。总的来说，防滑按钮减少了板坯加热的遮蔽面积86%，错位的板坯改变了板坯的遮蔽面积。这些因素加在一起有利于板坯的温度更加均匀。结果表明，该模型可为步进梁式加热炉板坯加热过程的理解、设计、控制和优化提供方便。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer