【摘要】 为深入了解水力旋流器内流场特性以及空气柱的动态演化过程，基于ANSYSFluent软件采用大涡模拟（LES）和流体体积（VOF）模型进行数值模拟。结果表明，旋流器内流场的速度分布呈Rankine涡结构特征，中心区域湍流脉动强度较大，外旋流区脉动强度较小，切向脉动速度和脉动压力在准自由涡和准强制涡交界处达到最大，轴向脉动速度在轴线附近达到最大，而中心区域脉动压力非常小。在旋流器中心由于低压吸入空气而形成空气柱，并围绕轴线作准周期拟序旋进运动，在气-液相界面呈现不规则变化，对旋流器流场的湍流特性有较大影响。研究结果将为分析旋流器分离效率、能耗机理和设计新型旋流器奠定基础。更多还原

【Abstract】 To gain a deeper understanding of the flow characteristics of hydrocyclones and the dynamic evolution process of the air core, this paper conducts numerical simulation research on the flow field inside the hydrocyclone based on large eddy simulation(LES) and volume of fluid(VOF) model by using software Fluent.The results show that the velocity distribution of the flow field inside the hydrocyclone follows a Rankine vortex structure, with higher intensity of turbulent fluctuation in the central region and lower intensity of fluctuation in the outer vortex region. Tangential velocity and pressure fluctuations reach the maximum at the junction of the quasi-free vortex and the quasi-forced vortex, and axial velocity fluctuations reach the maximum near the axis.Pressure fluctuations in the central region are very small, and external pressure fluctuations are greater than those in the central region. Due to the low pressure, the air is inhaled into the center of the hydrocyclone, and an air core is formed. The air core undergoes quasi-periodic coherent processing motion around the axis of the hydrocyclone and results in irregular changes in the gas-liquid interface, which has a significant impact on the turbulence characteristics inside the hydrocyclone. The research results will lay the foundation for analyzing the separation efficiency and energy consumption, and designing a new type of cyclone.更多还原