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管式空气电阻炉换热性能的数值模拟
Numerical simulation of heat transfer characteristics of tubular air resistance furnace
【摘要】 为满足金属与合金热处理过程中对高温高压纯净空气的需求,设计了一款管式空气电阻炉,采用Fluent软件对管内空气的对流传热过程进行数值模拟,研究了空气入口总压、加热功率、空气入口温度和入口质量流量对电阻炉换热性能的影响.结果表明:当空气入口总压为600~800 kPa时,电阻炉换热性能未受到明显影响;当加热功率升高时,电阻炉出口温度升高,其综合换热性能下降;当空气入口温度降低时,流体与管壁的温差变大,综合换热性能有所提高;当入口质量流量从1 kg/s增至5 kg/s时,流体Re增大,综合换热因子从108.3升至558.9,综合换热性能得到显著提高.该研究结果可为管式空气电阻炉的工业应用提供理论参考和运行依据.
【Abstract】 In response to the need for high temperature and high pressure pure air during the heat treatment process of metals and alloys, a tubular air resistance furnace has been designed. Fluent software has been used to numerically simulate the convective heat transfer process of air in the tube, and the influences of total air inlet pressure, heating power, air inlet temperature, and inlet mass flow rate on its heat transfer characteristics have been investigated. The results show that: when the total air inlet pressure is 600~800 kPa, there is no significant effect on the heat transfer performance of the furnace. When the heating power increases, the outlet temperature increases, and the comprehensive heat transfer performance of the furnace decreases. With the decrease of inlet temperature, the temperature difference between fluid and pipe wall becomes larger, and the comprehensive heat transfer performance is improved. When the inlet mass flow rate increases from 1 kg/s to 5 kg/s, the fluid Reynolds number increases, the comprehensive heat transfer factor increases from 108.3 to 558.9, and the comprehensive heat transfer performance is significantly improved. The research results provide theoretical reference and operational basis for the industrial application of tubular air resistance furnace.
【Key words】 air heating; resistance furnace; temperature variation; heat transfer characteristic;
- 【文献出处】 材料与冶金学报 ,Journal of Materials and Metallurgy , 编辑部邮箱 ,2025年01期
- 【分类号】TF083.1
- 【下载频次】12