水力旋流器湍流场特性分析研究

Study on Turbulence Field Characteristics of Hydrocyclone

利用计算流体力学的原理和方法,结合水力旋流器的分离机理,采用RSM湍流模型对水力旋流器湍流场进行数值模拟研究,揭示了尚不能用实验方法获得的湍流特征参数——湍动能和湍流耗散率的分布规律,明确了实现合理控制旋流器内流体湍流结构、节能降耗的技术方向。结果表明:压力陡降、湍动能及湍动能耗散率急剧增大均发生在轻相出料管端以下空气柱附近的内旋流区域,流体能量损失巨大,合理控制该区域的湍流结构是降减旋流器能耗的主要措施之一。

Combined with the hydrocyclone separation mechanism,a CFD-based numerical simulation of the turbulent flow field inside a hydrocyclone was carried out by using RSM turbulence model.It reveals the distribution of turbulent characteristic parameters-turbulent kinetic energy and turbulence dissipation rate which are obtained by the experiment.And then,clear about the implementation within a reasonable control cyclone fluid turbulent flow structure,the direction of energy saving technology.The technical direction of rational control of fluid turbulence structure,energy saving and consumption reduction in cyclone is clarified.The results show that the pressure drop,turbulent kinetic energy and turbulent dissipation rate increase occur in the spiral flow area near the air column below the overflow pipe,and the energy loss is serious.It also shows that reasonable control of turbulence structure in this region is one of the main measures to reduce the energy consumption of the cyclone.