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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-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)。
In order to grasp the flow resistance characteristics of gas-solid two-phase flow, numerical simulation of gas-solid two-phase flow was carried out on straight pipe section and horizontal pipe using computational fluid dynamics software CFX. The Euler-Lagrange method is adopted to select the numerical simulation model and the software simulation conditions are determined according to the working conditions of the simulation object. Through simulation, the main factors that affect the pressure loss of gas-solid two-phase flow in pipeline system are discussed, such as the characteristics of pipeline system, operating conditions, properties of materials and gas, etc. The velocity and pressure distribution of continuous phase and the particle trajectory are analyzed. The pressure field and velocity field distribution of gas-solid two-phase flow, the distribution and movement trajectory of particles in the tube and the distribution of system resistance and particle deposition under different working conditions were obtained. And under certain conditions, Lowest economic flow rate. The research results can provide references for engineering design and theoretical research of gas-solid two-phase flow. (Figure 18, Table 2, reference 10).