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无论k-ε模型及其修正模型,还是广泛应用于水力旋流器数值模拟的雷诺应力模型(RSM),都只是针对湍流核心区,对近壁区无效,如何确定液-液水力旋流器湍流场模拟的近壁处理方法亟待深入研究。在介绍湍流近壁区流动特点和处理方法的基础上,引入了2种湍流近壁处理函数——标准的和非平衡的壁面函数,在相同的网格系统和计算条件下计算了双锥双柱型水力旋流器内湍流场,结果与激光多普勒测速仪(LDV)测试结果基本吻合,但采用非平衡的壁面函数预报结果更为可信,为进一步精确研究旋流器内的流动过程打下良好的基础。
Both the k-ε model and its modified model, or the Reynolds stress model (RSM) widely used in numerical simulation of hydrocyclones, are only aimed at the core region of turbulence and have no effect on the near wall region. How to determine the liquid-liquid hydrocyclone Near wall treatment of turbulent flow field simulation needs further study. Based on the introduction of flow characteristics and treatment methods in the near wall of turbulent flow, two kinds of turbulent near-wall treatment functions, standard and unbalanced wall functions, are introduced. Under the same grid system and calculation conditions, The results of turbulent flow in columnar hydrocyclone are in good agreement with the results of laser Doppler velocimetry (LDV). However, the results of unbalanced wall function prediction are more credible. In order to further study the flow in swirler The process laid a good foundation.