Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
659054 | International Journal of Heat and Mass Transfer | 2012 | 9 Pages |
Abstract
A 3D unsteady numerical simulation of a reheating furnace was performed to obtain the optimal slab residence time. Too long residence time decrease the efficiency of the reheating furnace, whereas too short residence time cannot satisfy the required heating quality of a slab. The total five cases of residence times - 6032Â s, 6496Â s, 6960Â s, 7424Â s and 7888Â s - were investigated for the optimum residence time analysis with the two slab requirements, those of emission temperature and uniformity. In this study, the slab emission temperature should be in the range between 1373Â K and 1573Â K. The skid mark severity of an emitted slab should be lower than 50Â K to satisfy the uniformity requirement. The numerical analysis was done for the identical geometry and operating condition of the reheating furnace using FLUENT. Slabs were assumed to move very quickly that it took no time for them to move next positions. The quick movements of slabs were processed with the own developed User-Defined Function program. Among the five cases of residence times, the residence time of 7427Â s turned out to be most efficient.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Sang Heon Han, Daejun Chang,