基于CFD的充填管道固液两相流输送模拟及试验

为解决和睦山铁矿充填料浆的管道自流输送问题,采用固液两相流理论和计算流体动力学(CFD)方法,建立充填料浆在管道中自流输送的两相流控制方程;利用Gambit构造实际管道的三维网格模型,在Fluent的3D解算器中进行数值模拟。通过分析管道输送的阻力损失和弯管部分的受力情况,获得料浆输送的最佳浓度和流量。料浆坍落度试验、自然沉降试验以及现场工业输送试验验证了数值模拟结果的可靠性。研究结果为该矿即将投入使用的永久充填系统运行参数的选取提供了重要的依据。

Simulation and experiment of backfilling pipeline transportation of solid-liquid two-phase flow based on CFD

In order to solve the gravity transportation problems of backfilling slurry by pipelines in Hemushan Iron Mine,solid-liquid two-phase flow theory and computational fluid dynamics(CFD) method were used.Two-phase flow control equations of backfilling slurry in the pipeline through the gravity transportation were established.The three-dimensional(3D) mesh model of real pipeline was established using soft Gambit and the numerical simulation was conducted in the 3D solver of Fluent.Through analyzing resistance loss of the pipeline and force condition of the elbow,optimal transportation concentration and volume flow of the backfilling slurry were acquired.The slump test and natural settlement test of backfilling slurry and in-situ industrial transportation test verify the reliability of the numerical simulation results.The research results provide important basis for the parameter selection of the permanent backfilling system in the mine.