两种溢流口形状对水力旋流器性能影响

The Effect of the Two Spill Shapes on the Hydrocyclone Performance

为了研究圆柱形溢流口和圆台形溢流口对水力旋流器分离过程性能的影响,该文通过ANSYS软件分别求解其内部速度流场和压力场,分析流场的稳定性。研究结果表明:圆台形溢流口水力旋流器中心轴处的切向速度为零,往外延伸速度不断增大,但在旋流器内壁处,切向速度骤降为零;圆柱形溢流口水力旋流器的切向速度变化规律与之相似,但圆台形溢流口的切向速度变化规律更加平稳。圆台形溢流口水力旋流器整体压降要比圆柱形溢流口水力旋流器大13 kPa;进一步分析两种水力旋流器的分离效率和湍流强度,发现圆台形溢流口的分离效率和湍流强度比圆柱形溢流口略高,固-液两相流在旋流器内部停留的时间更长,分离效率更好。

in order to study the effect of cylindrical overflow and circular spillway on the separation performance of hydraulic cyclone,the internal velocity flow field and pressure field were solved by ANSYS software,and the stability of flow field was analyzed.The results show that the tangential velocity is zero on the central axis of the circular spillway hydraulic cyclone,and the outward extension speed is increasing.At the inner wall of the cyclone,the tangential velocity drops to zero,and the tangential velocity of the cylindrical spillway hydraulic cyclone is similar.However,the shear velocity of circular spillway is more stable.The overall pressure drop of the hydrocyclone is 13 kPA greater than that of the hydrocyclone.The separation efficiency and turbulence intensity of the two hydrocyclone are further analyzed It is found that the separation efficiency and turbulence intensity of the round-shaped overflow port are higher than those of the cylindrical overflow port,and the solid-liquid two-phase flow stays longer in the hydrocyclone.