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分析了导流板自身的结构特点,考虑了循环气体沿导流板四周的流动,采用流动阻力分析和预测校正方法,对炉内循环气体流量分配进行了模型化,并对影响流动分配的相关影响因素(循环气体成分、温度、循环流量、壁面粗糙度和炉台底部导流器的出口角度)进行了敏感性测试.模型化结果与CFD软件模拟结果及现场流场测试结果基本一致,同时壁面粗糙度在低于0.002 m的范围内对循环气体流量的分配影响较为明显,而高于0.002 m的范围内对循环气体流量的分配影响较小,其余因素对炉内循环气体的流量分配影响较小.
The structural characteristics of the baffle are analyzed. The flow of circulating gas around the baffle is considered. The flow resistance analysis and prediction correction method are used to model the circulating gas flow distribution in the furnace. The influencing factors (circulating gas composition, temperature, circulating flow, wall roughness and exit angle of the bottom flowguides of the furnace platform) were tested.The results of modeling were consistent with those of the CFD software and the on-site flow field test results, The influence of roughness on the distribution of circulating gas flow is more obvious when the roughness is less than 0.002 m, while the distribution of circulating gas flow is less affected when the roughness is higher than 0.002 m. The other factors have less influence on the circulation distribution of circulating gas in the furnace small.