Numerical simulation of floating heat transfer process and structure optimization of air cushion furnace

doi:10.13251/j.issn.0254-6051.2020.09.047

Abstract

Abstract: Air cushion furnace is a kind of advanced equipment for heat treatment of thin aluminum alloy sheet.Based on the structure of air cushion furnace designed by an aluminum factory,a three-dimensional calculation model of the whole air cushion furnace was established.And floating heat transfer process of sheet in this furnace was simulated by means of fluid-solid coupling FSI analysis method.The results show that the heat transfer in the furnace is basically uniform,but the downward distortion of the sheet is too large to achieve normal floatation.In order to reduce the sheet distortion,orthogonal experiments were used to optimize the nozzle layout parameters of the air cushion furnace in the optimum space,and the structure parameters of the air cushion furnace diversion device were optimized based on response surface and genetic algorithm.The results show that the air flow and pressure distribution on the upper and lower surfaces of the plate are more reasonable after optimization.The distortion of the sheet in the furnace is reduced from 110.3 mm to 41.4 mm,and the floatation of the sheet is realized.

Key words: air cushion furnace, floating heat transfer, orthogonal experiment, response surface methodology, genetic algorithm, structure optimization

CLC Number:

TG155

Zhang Jiayuan, Li Ping, Zeng Qi. Numerical simulation of floating heat transfer process and structure optimization of air cushion furnace[J]. Heat Treatment of Metals, 2020, 45(9): 248-256.

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