Abstract: The forces affecting the motion of particle clusters near the wall of a Circulating Fluidized Bed (CFB) were analyzed to determine the contact time of particle clusters and to develop a theoretical model for the particle-gas convection heat transfer coefficient. The results compare well to prior experimental data,suggesting that this theory accurately reflects the convection heat transfer in a CFB.

Key words:

循环流化床, 气固两相流动, 传热

摘要： 对循环流化床锅炉床体内部贴近壁面的颗粒团运动和受力特点进行了分析，探讨颗粒团沿壁面下滑贴壁时间的计算方法，由此发展了床体内部颗粒-气体对流换热传热系数的理论计算模型和方法.与现有文献的实验数据资料比较表明，计算的结果较好地反映了实际情况.

关键词:

循环流化床, 气固两相流动, 传热