Flow Analysis of Combustion Gas Flow in High Temperature Regenerative Heating Furnace
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摘要: 运用Fluent软件对天然气在高温蓄热式加热炉中的燃烧过程进行了模拟研究.比较分析了影响炉膛内气流温度、流场以及烟气质量分数分布特征的主要因素.结果表明:当天然气和空气的预热温度都不变时,改变天然气和空气射流间的夹角,会影响炉膛内的温度分布,炉内的最高温度几乎呈线性降低,炉内平均温度呈二次曲线变化先增大后减小.当天然气和空气射流间的夹角为35°时,炉内表面和钢坯表面温度比较均匀,并且NO生成量少,对提高钢坯的加热质量和降低环境污染均非常有利.Abstract: Numerical simulation of temperature field in high temperature regenerative heating furnace by Fluent software.This paper compares and analyzes main factors of the gas flow and characteristics of temperature distribution in the furnace.Temperature field and flow field are simulated in the furnace when changing the direction of the natural gas and air.The results show that when the preheating temperature of natural gas and the air is constant, changing the angle between natural gas and air jet, the temperature and flow field have changed. The maximum temperature and the average temperature curves nearly assume the linearity to be reduced, the average temperature curve becomes the conic section change, and the high temperature area approaches the nozle place. When the angle of burners is at 35°, temperature in furnace and surface on steel billet is relatively uniform. Moreover, amount of formation of NO is less, which is a favorable factor for heating quality and reducing environmental pollution of steel billet.
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Keywords:
- natural gas /
- flow field /
- temperature field /
- concentration field
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