双喷嘴矩形喷动床内气固两相流的数值模拟

Numerical Simulation of the Gas-solid Two-phase Flow in Double Nozzles Rectangular Spouted Bed

以欧拉双流体模型和多相流动力学理论为基础,采用湍流模型对锥底角为60°的双喷嘴矩形喷动床内气固两相流的动力学特性进行了模拟研究,得到了喷动高度、全床压降和气速之间的关系.自定义了双喷嘴矩形喷动床抛物线型入口速度,并且经线性回归得到了在任一水平面上颗粒向上的速度沿径向变化的函数.模拟结果与实验数据吻合较好,为工程实际应用提供理论依据.

A k-ε turbulence model was used to simulate the kinetic characteristic of gas-solid two-phase flow based on the Euler-Euler model and kinetic theory ofmultiphase flow in the double nozzles rectangular spouted bed. The taper was 60 ° for the double nozzles rectangular spouted bed. The relationship of the spouting height, pressure drop and flow rate was obtained. The function between Particle upward speed and the radial direction was obtained by the linear regression in any horizontal plane of the spout when the inlet velocity was user-defined parabola in the double nozzles rectangular spouted bed. The simulation results are consistent with the experimental data and provide a theoretical basis for practical applications.