滴头流道中颗粒物质运移动态分析与CFD模拟

采用CFD模拟技术,对迷宫式滴头流道内不同质量浓度的悬浮颗粒运动情况进行数字化模拟计算,并采用两相流动力学理论对迷宫式滴头结构尺度下的悬浮颗粒的随流性进行了分析,研究结果表明,采用DPM模型对悬浮颗粒分布特点的模拟结果与已有试验数据吻合度较高,可以作为模拟的手段;水流中颗粒质量浓度对滴头内部流场有着较强的反作用,应在模拟过程中予以重视;根据Stokes数的计算结果,10%左右的颗粒随流性差,可以认为导致滴头堵塞的物质主要来自于这一部分颗粒。

Study on Dynamic Analysis of Particle Movement in Drip Emitter Based On CFD

The simulation of the suspended particles movements at the different concentrations in the labyrinth emitter was approached by using computational fluid dynamics (CFD) technology. The ability of suspended particles movement along with water in the labyrinth emitter was analyzed by using two-phase flow dynamics. The results indicated that the simulation results of suspended particles movement by using DPM model showed a higher similarity comparing with the previous experiments. And the CFD technology is a good method to simulate the movement of the particle in the emitter path;the reaction of the particles to the flow in the emitter was intense and should not be ignored in the simulation;according to the Stokes number compute results, some particles could not keep along with the water well, and those particles can be considered as the emitter fouling substances.