油-水旋流器粒级效率数值模拟

Numerical Simulation for Particles Efficiency in Oil-Water Hydroclone

在对油-水旋流器的流场模拟基础上,采用RSM湍流模型和Mixture模型对其分离特性和粒级效率进行模拟。结果表明:在旋流器中,不同粒径的颗粒运动轨迹不同,离散相颗粒的分离效率随着粒径的增大而增大;不同粒径的流体质点在同一旋流器中的运动轨迹、速度、分离特性等方面都有较大的差别;旋流器的轴心处会形成油核,且油核的形状与油滴的大小直接相关,旋流器的主要分离过程在圆锥段完成。

The research is based on simulation of flow field in oil-water hydrocyclone. The RSM turbulence model and Mixture model is used in the simulation of separation characteristics and particles efficiency. The results show that.because of different sizes,the orbits of particles are dif- ferent;the separation efficiency of discrete phase particle increases when the particle size is larger and larger;most characteristics of fluid particles in the same structure trajectory, such as speed, separation and so on, is much more different. This proves that the oil core exits in the centre of the hydrocyclone,and the shape of the oil core is relative with the magnitude of oil particles ; the main process of separation occurs in the cone.