传统单、螺旋双入口结构旋流器内气流流型及分离效率的模拟( Simulation of Gas Flow Pattern and Separation Efficiency in Cyclone with Conventional Single and Spiral Double Inlet Configuration )

B Zhao Y Su J Zhang Theoretical or Mathematical/ computational fluid dynamics finite volume methods flow separation Navier-Stokes equations turbulence two-phase flow vortices/ gas flow pattern simulation spiral double inlet configuration fluid flow numerical simulation particle dynamics CFD technique cyclones Reynolds averaged Navier-Stokes equations Reynolds stress turbulence model finite volume method Lagrangian method particle motion tracking gas-particle separation efficiency turbulence inlet geometry velocity distribution Rankine vortex theories single inlet configuration/ A4730 Rotational flow, vortices, buoyancy and other flows involving body forces A4755K Multiphase flows A4710 General fluid dynamics theory, simulation and other computational methods A4725 Turbulent flows, convection, and heat transfer E2130 Fluid mechanics and aerodynamics (mechanical engineering) E0210L Numerical analysis

采用CFD技术对传统单进口(SI)和螺旋双进口(DI)两种旋风分离器的流体流动和颗粒动力学进行了数值模拟。在流体计算领域，采用基于简单压力修正算法的有限体积法，求解含雷诺应力湍流模型的雷诺平均Navier-Stokes方程。采用拉格朗日方法跟踪旋风分离器内颗粒的运动，计算气固分离效率。根据计算结果，描述了气体流动的压力、速度和湍流参数的差异，以解决入口几何形状对旋风分离器流型的影响。特别是对旋流器中的一个关键流动参数&切向速度分布，采用经典的朗肯涡理论进行了分析。通过实验数据与理论模型的比较，对旋风分离器的分离性能进行了预测。结果表明，CFD方法能有效地揭示不同进口结构旋风分离器内气固两相流动和分离的机理。

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