双流道泵内非定常固液两相流的数值分析

Numerical Analysis on Unsteady Solid-liquid Two-phase Flow in a Double Channel Pump

采用Mixture多相流模型、标准的k-ε湍流模型与SIMPLEC算法,应用FLUENT软件对双流道泵内固液两相湍流进行了非定常数值模拟。研究结果表明:不同时刻,泵流道内的压力分布明显不同,呈现周期性变化规律;在叶轮流道内,固相体积浓度分布极不均匀,颗粒主要集中于叶轮出口处的工作面和后盖板上,而在蜗壳流道内,固相颗粒多集中于离叶轮半径较大的蜗壳壁面上。

To further study the solid-liquid two-phase flow mechanism in double-channel pump,three dimensional unsteady simulation was performed for the solid-liquid two-phase turbulent flow in double-channel pump by using Fluent software with mixture model,SIMPLEC algorithm and standard k-ε turbulence model.It is concluded that the pressure distribution in the channel is obviously different and changed periodically.In channels of impeller,the volume fraction contour is extremely nonuinform,solid particles mainly accumulate on pressure surface of impeller.However,in the channel of volute,solid particles mainly accumulate on the wall of volute far away from impeller.