稠密气固两相反应流的拉格朗日法

Modeling of Dense Particle-Gas Two-phase Reacting Flow in Lagrangian Approach

  • 摘要: 提出了采用欧拉坐标和拉格朗日坐标相结合研究稠密气固两相反应流的方法,建立了稠密两相反应流中两相运动、传热、化学反应的模型与算法,采用该模型与算法研究了循环流化床排烟脱硫装置内的两相反应过程,得到了详细合理的计算结果。结果表明,采用此模型和算法模拟工程意义上的稠密气固两相反应流是可行的。

     

    Abstract: A simulation method of dense particle-gas two-phase reacting flow in the mixed Eulerian-Lagrangian approach is proposed, and the comprehensive model covers the two-phase turbulent flow, heat transfer and chemical reactions. The model is used to numerically study two-phase reacting process in a circulating fluidized bed. Detailed results on cluster structure, cluster size, particle volume fraction, gas velocity and particle velocity are obtained. The simulation results are reasonable, and are in agreement with experimental ones. It is concluded that the model and algorithm are feasible and can be used to study the dense particle-gas two-phase flow efficiently.

     

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