关键词: 离心喷嘴;二相流;数值仿真;流体动力模型

Abstract: Numerical simulation of the internal flow of a swirling nozzle is carried out by using the single-fluid model, in which the gas-liquid interface was distinguished by the two-phase mixture fraction. The structure of the flow field, which consists of liquid film and gas core, was obtained. The predicted results of the wall pressure distribution, axial velocity profiles at the outlet and the spray angle agreed well with the experimental datum. Compared with the ALE method, which is commonly used to track the gas-liquid interface, the numerical method in present work has the advantages of simplicity and lower computational cost for understanding of the flow properties in the swirling nozzle and improving of the nozzle design.

Key words: Centrifugal injector;Two phase flow;Numerical simulation;Hydrodynamic model