The Analysis of Flow Regime in the Aerated Flow

Setting aeration facilities on the discharge structure in the dam to make the gas in the flow, is a common used method to reduce erosion damage to the building today. Based on the feature of the discharge structure and considering the types of the ventilation facilities and air-intake system, this paper simplified a model for project to analyze and established the corresponding mathematical model. With ICEM/CFD software the finite element model was generated. Using the commercial software FLUENT to do the flow state analysis, it obtained the velocity of the aerated flow and the pressure distribution. On the basis of the simulation of the single characteristic diameter bubble flow, it gave a contrast and analysis to the range of application and the differences of accuracy between the SIMPLE and PISO methods.