气固两相流管道流动阻力特性数值模拟

为掌握气固两相流的流动阻力特性，利用计算流体动力学软件CFX，对直管段及水平弯管进行气固两相流数值模拟。采用欧拉一拉格朗日法选择数值模拟计算模型，根据模拟对象工况，确定软件模拟条件。通过模拟，对管道系统的特性、操作条件、物料和气体的性质等影响气固两相管流压力损失的主要因素进行了探讨，对连续相速度和压力分布特性以及颗粒运动轨迹进行了分析，得到了气固两相管流的压力场、速度场分布，颗粒在管内的分布情况和运动轨迹，以及不同工况条件下的系统阻力和颗粒沉积量分布规律，并确定了在特定条件下能耗最小的经济流速。研究成果可为气固两相流的工程设计和理论研究提供参考。（图18，表2，参10）。

Numerical simulation of flow drag characteristics of gas-solid two-phase flow in pipeline

In order to identify the flow drag characteristics of gas-solid two-phase flow, the gas-solid two-phase flow in straight and horizontal bent sections of pipelines is numerically simulated using the commercial software CFX which computes fluid dynamics. The software simulation conditions is determined by adopting the Eulerian-Lagrangian method for the choosing of numerical simulation computing model and taking into account the running condition of the simulated objects. Through this simulation, main factors affecting the pressure loss of gas-solid two-phase flow, such as system characteristics and operating conditions of pipeline system, and properties of materials and gas, are discussed, and the continuous phase velocity, pressure distribution characteristics, and particle moving trajectory are analyzed. The pressure field and velocity field distribution of gas-s01id two-phase flow, the distribution and trajectory of particle inside pipeline, and the distribution law of system drag and settlement amount of particle under different conditions are derived. In addition, the economic velocity at the lowest energy consumption under certain condition is determined. The research results can provide a reference to the engineering design and theoretical study of gas-solid two-phase flow. （18 Figures, 2 Tables, 10 References）