采用整体三维数值模拟的方法,在计算中考虑各部件间的相互影响,应用欧拉双流体granular模型和颗粒脉动理论,采用Gidaspow相间动量交换模型,对小型生物质循环流化床气化炉实验装置进行了研究.模拟了炉内气固两相的三维流动和分布情况在不同炉内含料量下的变化规律,在返料口高度以上形成了封闭的压力环路,提升管内呈现大尺度的轴向内循环,返料管口以上管段无法形成清晰的环核结构,模拟结果与实验数据吻合较好.%Entire 3-D numerical simulation was used to study the experimental device of miniature biomass circulating fluidized beds gasifier ( CFBC). Mutual influence of each unit was taken in consideration in simulation. Euler dual fluid granular model, particle pulsation theory and Gidaspow momentum exchange model were used. The simulation showed the variations of 3-D gas-solid flow structures and distributions at different solid inventories. It formed a pressure loop over the height of reefed line orifice, and performed large scale axial circulations. It could not form obvious core-annulus structures over the height of reefed line orifice. The simulation results fit well with the experiment results.
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