Numerical Simulation of Temperature and Flow Field in Horizontal Continuous Annealing Furnace

Su Fu-Yong,Li Zhi

doi:10.19026/rjaset.6.3951

Abstract

This study aims to get the temperature field and flow field of the heating section in a horizontal continuous annealing furnace of hot-rolled stainless strip by using CFD to build a 3-D simulation model. The simulation results are compared with measured data and the accuracy of the model is proved by the predicted temperature distribution. On this basis, focus on the distribution and variation of convective heat transfer coefficient and equivalent radiation heat transfer coefficient of the strip surface. All the researches have great significance on further developing the mathematical model of horizontal continuous annealing furnace of stainless strip and optimizing the controlling strategy.

Highlights

The continuous annealing process of strip steel is used to improve the required physical and mechanical properties of strip steel
The stainless strip goes into the heating section from the head of the first chamber and out from the end of the fourth chamber, the gas flows in the opposite direction, which goes out from the head of the first chamber
The heating section uses open flame to heat the strip, there are 126 burners equipped on the side walls of the furnace and each one has 1 fuel inlet, 4 primary air inlets and 3 secondary air inlets

Summary

INTRODUCTION

The continuous annealing process of strip steel is used to improve the required physical and mechanical properties of strip steel. The stainless strip goes into the heating section from the head of the first chamber and out from the end of the fourth chamber, the gas flows in the opposite direction, which goes out from the head of the first chamber. Select No.304 stainless steel with the width is 1.52 m as the product. It is hanged freely in the furnace. As the strip may change in shape and heating condition while being contacted with the steel roller, in each chamber, we have ignored the strip at the head and the end along the chamber length of 0.2 m and just focused on the 18.3 m left

MATHEMATICAL MODELS

Chamber number

NUMERICAL SOLUTION OF MATHEMATICAL MODEL

Findings

CONCLUSION