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Simulation of coal combustion by AUSM turbulence-chemistry char combustion model and a full two-fluid model

机译：通过AUSM湍流化学炭燃烧模型和完整的双流体模型模拟煤燃烧

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An algebraic unified second-order moment (AUSM) turbulence-chemistry model of char combustion is introduced in this paper, to calculate the effect of particle temperature fluctuation on char combustion. The AUSM model is used to simulate gas-particle flows, in coal combustion in a pulverized coal combustor, together with a full two-fluid model for reacting gas-particle flows and coal combustion, including the sub-models as the k-ε-k_p two-phase turbulence model, the EBU-Arrhenius volatile and CO combustion model, and the six-flux radiation model. A new method for calculating particle mass flow rate is also used in this model to correct particle outflow rate and mass flow rate for inside sections, which can obey the principle of mass conservation for the particle phase and can also speed up the iterating convergence of the computation procedure effectively. The simulation results indicate that, the AUSM char combustion model is more preferable to the old char combustion model, since the later totally eliminate the influence of particle temperature fluctuation on char combustion rate.
机译：介绍了焦炭燃烧的代数统一二阶矩湍流-化学模型，计算了颗粒温度波动对焦炭燃烧的影响。 AUSM模型用于模拟煤粉燃烧器中煤燃烧中的气体颗粒流，以及用于反应气体颗粒流和煤燃烧的完整两流体模型，包括子模型k-ε- k_p两相湍流模型，EBU-Arrhenius挥发物和CO燃烧模型以及六通量辐射模型。该模型还采用了一种新的计算颗粒质量流率的方法来校正内部部分的颗粒流率和质量流率，这可以服从颗粒相的质量守恒原理，并可以加快颗粒物的迭代收敛。计算程序有效。仿真结果表明，AUSM炭燃烧模型比旧的炭燃烧模型更好，因为后者完全消除了颗粒温度波动对炭燃烧率的影响。

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