Numerical Simulation of Throat in Optical Glass Electric Melting Furnace

Abstract

Abstract: The numerical simulation and analysis of throat in optical glass electric melting furnace was carried out by ANSYS 19.0 software.The flow distribution,temperature distribution and local backflow circulation were studied on different sizes of furnace throat design.The maximum backflow position of glass in the throat was analyzed,and then the number of local circulation loops in the throat and riser was described.The results indicate that multiple local circulation loops are found in the throat and riser,and the throat backflow circulation loops result in decreasing of glass forward flowing cross section and increasing glass velocity in z direction.Meanwhile,the backflow circulation loops also have a bad effect on the local temperature distribution of the throat,so that high temperature areas always close to the throat roof,which accelerate the erosion of roof.By reducing the width or height of throat,the recirculation ranges in the throat are reduced and the temperature uniformity of local glass have been improved.According to the curve fitting,there is no backflow circulation loops observed within the throat roof coverage area when the fixed height is 150 mm and the width is 108.14 mm or when the fixed width is 250 mm and the height is 77.57 mm.

Key words: electric melting furnace, throat, riser, glass backflow, numerical simulation

CLC Number:

TQ171

GUO Fuqiang, HE Guang, PAN Zaiyong, CHEN Xiaoli, WANG Naishuai. Numerical Simulation of Throat in Optical Glass Electric Melting Furnace[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 271-279.

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