【摘要】 基于两流体模型,建立了固液两相流中更一般的K—ε双方程湍流模型。模化了固相和液相的连续方程,动量方程及K方程和ε方程。在这些模化方程中,考虑了固液两相间速度的滑移,颗粒间的作用及相间作用。使用本文所建立的湍流模型和颗粒磨损模型,可预测固液两相湍流中的流动特性和颗粒对过流部件的磨损率。本文给出了一水轮机导叶在含沙水流中的过流特性及磨损情况的数值模拟。预测结果与实验结果比较一致。更多还原

【Abstract】 A two-equation K-ε turbulent model has been developed for predicting solid-liquid two-phase flows based on the two-fluid model. The continuity, the momentum, K and ε equations are modeled. In this model, the solid-liquid slip velocity, the interactions of particle-particle and particle-fluid are considered. By using this turbulence model and the wear model, the solid-liquid turbulent flows and the wear rate of the wall caused by solid particles suspended in a turbulent flow can be predicted. As an example the wear rate of a hydraulic turbine gate vane has been numerically predicted. The result shows that good agreement is attained.更多还原