内螺旋道式旋流器流场特征及分离性能

The flow field characteristics and the separation performance of inner spiral channel cyclone

针对传统旋流器分级效率低的问题,提出一种内螺旋道旋流器,利用CFD软件进行数值模拟,研究了内螺旋道结构尺寸对旋流器内部流场规律的影响,并通过试验将内螺旋道旋流器与常规旋流器进行了对比验证,模拟结果表明:内螺旋道旋流器的流场静压及轴向速度降低,能量损失减少,颗粒在旋流器内部流场的停留时间增加,切向速度增大,分离效果增强。对比试验结果表明,对-10μm颗粒,内螺旋道旋流器的综合分级效率较之常规旋流器提高了4.09%,分级效果更好。

For the problem of low classification efficiency of traditional cyclones,an internal spiral channel cyclone was designed.Numerical simulation was carried out with CFD software,and the influence of structural size of internal spiral channel on the internal flow field and separation performance of the cyclone was studied.The internal spiral channel cyclone and the conventional cyclone were compared and verified through experiments.The simulation results show that the static pressure and axial velocity of the flow field of the internal spiral channel cyclone were reduced,therefore the energy loss was reduced.The residence time of particles inside the cyclone increases,the tangential velocity increases,and the separation effect is enhanced.The comparative test results show that for-10μm particles,the comprehensive classification efficiency of the inner spiral cyclone is 4.09%higher than that of the conventional cyclone,verifying that the classification effect is better.