The model of combustion fraction for dense phase in circulating fluidized bed combustor has been built up, based on thermal balance, gas analysis and total gas amount.

建立了基于热平衡法、烟气分析法和烟气量法的循环流化床锅炉燃烧室密相区燃烧份额计算数学模型，并分析比较了各种模型的特点。

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These models are used to numerically study the two-phase flow in a Circulating Fluidized Bed (CFB), and detailed results regarding the dense two-phase flow characteristic in a CFB are obtained.

用此模型对循环流化床的两相流动进行数值模拟，得到了较详细的床内流动特性。

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