NUMERICAL SIMULATION OF GAS-LIQUID TWO-PHASE TURBULENT FLOWS THROUGH A CENTRIFUGAL IMPELLER

摘要

On the basis of the theory of the two-fluid model for multiphase flows, the dispersed phase (gas phase in this study) in these flows, at dilute concentration conditions, can be assumed to be a pseudo-fluid, which occupies a certain fraction volume in the whole flow domain shared with the continuum phase, i.e., the real fluid phase. According to this assumption, the simulation of two-dimensional gas-liquid two-phase turbulent flows through a centrifugal pump impeller has been conducted by using the k-ε-A_p turbulencemodel and the SIMPLEC algorithm at dilute gas concentration conditions. The present computer program has been developed to simulate three-dimensional two-phase turbulent flows.