有机硅单体合成的气固流化床的三维数值模拟

3D Numerical Simulation of Gas-solid Fluidized Bed for Organic Silicon Monomer Synthesis

为了探索有机硅单体合成气固流化床内硅粉颗粒的流化特性,作者利用计算流体力学CFD软件,采用双欧拉气固两相流模型及SIMPLE算法,模拟了三维的气固流化床内硅粉颗粒的流化特性;分析了气泡生成、长大和破裂的过程,及不同床层高度的固体颗粒运动速度矢量图,不同床层高度处横截面颗粒体积分数变化。结果表明:三维模拟能直观的表现颗粒在流化床中的流化状态,为工业生产及应用提供了有效的依据。

In order to investigate the fluidization characteristics in fluidized bed with silicon powder particles, the Computation Fluid Mechanics （CFD） was used to simulate three-dimensional gas-solid flow hydrodynamic characteristics in turbulent fluidized bed under different operation conditions. The Eulerian-Eulerian multiphase model and the SIMPLE algorithm were adopted to analyze the process of bubbles formation, growth and vanishing;and based on the kinetic theory of granular flow, the gas-solid flow characteristics in fluidized bed were studied. The results show that the three-dimensional simulation can provide the performance of the particles in the fluidized bed directly, and provide effective basis for industrial production and application.