充气式平底旋流器流场数值模拟研究

Study on Numerical Simulation of Flow Field in Inflatable Flat-bottom Cyclone

为提高旋流器的分离精度和效率,设计了一种充气式平底旋流器,并采用CFD数值模拟技术探究其内部流场规律。研究结果表明:充气式旋流器外旋流附近的压力梯度高于平底旋流器,切向充气式旋流器更加明显;充气式旋流器的切向速度在半径10 mm以外区域高于平底旋流器,切向充气式旋流器更明显;在内旋流区域中心,充气式旋流器的轴向速度较大,切向充气式旋流器的变化更为明显,充气式旋流器在外旋流区域的轴向速度小于平底旋流器;对于粗颗粒来说,切向充气式旋流器的分级效率最高,对于细颗粒来说,径向充气式旋流器的分级效率最高;研究结果可为充气式旋流器的设计及应用提供经验借鉴。

In order to improve the separation accuracy and efficiency of the cyclone,an inflatable flat-bottom cyclone was designed,and the CFD numerical simulation technology was used to explore its internal flow field law.The results show that the pressure gradient near the outer swirl of the inflatable cyclone is higher than that of the flat-bottom cyclone,and the tangential inflatable cyclone is more obvious.The tan-gential velocity of the inflatable cyclone is higher than that of the flat-bottom cyclone beyond the radius of 10 mm,and the tangential inflatable cyclone is more obvious.In the center of the inner swirl region,the axi-al velocity of the inflatable cyclone is larger,and the change of the tangential inflatable cyclone is more obvi-ous.The axial velocity of the inflatable cyclone in the outer swirl region is smaller than that of the flat-bot-tom cyclone.For coarse particles,the tangential inflatable cyclone has the highest classification efficiency.For fine particles,the radial inflatable cyclone has the highest classification efficiency.The research results can provide experience for the design and application of inflatable cyclones.