梭锥管混浊流体分离装置倾角优化数值模拟研究

Numerical Simulation of Tilt Angle Optimization of Shuttle-conical Tube Separation Device

为了研究锥圈倾角和下锥管倾角对梭锥管内水沙分离效果的影响,在数值模拟计算结果与PIV测试结果一致基础之上,建立了5个不同锥圈倾角和7个不同下锥管倾角的梭锥管模型,采用层流方程和简化的多相流Mixture模型通过数值模拟计算了浑水含沙浓度为5kg/m3时各个梭锥管内部的泥沙浓度和速度场,详细对比分析了不同倾角下梭锥管内的速度场和浓度分布特性。结果表明,在上锥管结构尺寸、锥圈间距不变的条件下,锥圈倾角β与下锥管倾角γ相等且等于45°时,梭锥管水沙分离效果最好,在该角度下锥圈上表面泥沙滑动至排沙通道所需要的时间最短,梭锥管水沙分离效率最高。

In order to study the effects of the tilt angle of conical circles and the lower cone angle of inclination on the water-sediment separating in Shuttle-conical tube,based on the consistency of the numerical simulation result with the PIV test results,five different cone angles and seven different circles under the cone of shuttle-conical tube were established,sediment concentration and velocity field were calculated through numerical simulation under the condition that the silt content concentration of muddy water was 5kg/m^3,and the characteristics of velocity field and the concentration distribution were compared and analyzed in detail under different angles.The results showed that under the condition that the cone structure size and the cone ring spacing are the same,β=γ=45°is the best angle for the separation of water and sediment.Under this angle,the time needed for the sediment on the cone ring surface sliding to the flushing channel is the shortest,and the water and sediment separation efficiency is the highest in shuttle-conical tube.