双面辐射附墙燃烧加热炉数值模拟

Numerical Simulation of Double-sided Radiant and Wall Attaching Combustion Heater

运用CFD模拟分析某双面辐射附墙燃烧加热炉,获得烟气流场、温度场、压力场及每根炉管外壁温度和热强度分布。最终得出结论:除火焰区域外,炉膛温度随着炉膛高度增加而增大,炉底最低,炉顶最高,两者差值100℃;加热炉辐射段内部烟气存在回流;炉膛压力随着炉膛高度增高而增大,炉底和炉顶相差75Pa;管壁温度随着管排增高而减小,出口管炉管温度最高;管壁热强度随着管排增高而增大,入口管管壁热强度最大。

CFD is used to simulate and analyze a double-sided radiant and wall attaching combustion heater,and the flue gas flow field,temperature field,pressure field,and the outer wall temperature and heat intensity distribution of each tube are obtained.The final conclusion is that there is backflow of flue gas in the radiation section of the heater;except for the flame area,the gas temperature in the heater increases with the heater height,the furnace bottom is the lowest,and the furnace top is the highest,the difference between them is 100℃;the pressure increases with the heater height,and the difference between bottom and top of heater is 75 Pa;the tube wall temperature decreases with the tube row height and the outlet tube temperature is the highest;the heat intensity increases with the tube row height and the heat intensity of inlet pipe is the largest.