摘要
针对常规旋流器分级精度低、运行能耗高的问题,提出了一种改进旋流器锥段的方法用于提高旋流器分级性能,通过数值计算法呈现了直线型、抛物线型和双曲线型锥段结构旋流器对内部流场特性和分离性能的影响规律。数值模拟结果表明:采用抛物线锥段可使其旋流器的切向速度和轴向速度减小,降低乱流的发生概率,流场稳定性得到有效提升,双曲线锥段内部流场不稳定,不利于颗粒的平稳运行。抛物线型旋流器零速包络面外移,细内旋流空间变大,细颗粒得到充分分离,分级精度得到一定提升。相比于常规型和双曲线型,抛物线型旋流器具有较小的湍流强度,颗粒稳定性得到有效提升,同时,抛物线型旋流器的陡度指数从0.61提升为0.72,旋流器分级精度得到大幅提升,由于其分离空间的变大,切割粒径稍有增大。
A method to improve the classification performance of the cyclone was proposed by modifying the cone section of the conventional cyclone to address the problems of low classification accuracy and high operating energy consumption.The influence of linear,parabolic,and hyperbolic conical structures of cyclones on the internal flow field characteristics and separation performance was presented through numerical calculation methods.The numerical results show that using a parabolic cone can reduce the tangential and axial velocities of the cyclone,reduce the probability of turbulence,and effectively improve the stability of the flow field.The internal flow field of the hyperbolic cone is unstable,which is not conducive to the smooth operation of particles.The zero speed envelope surface of the parabolic cyclone moves outward,increasing the space for fine internal swirling flow and allowing for sufficient separation of fine particles,resulting in a certain improvement in classification accuracy.Compared to conventional and hyperbolic models,parabolic cyclones have lower turbulence intensity and effectively improve particle stability.At the same time,the steepness index of parabolic cyclones has been increased from 0.61 to 0.72,greatly improving the classification accuracy of cyclones.Due to the increase in separation space,the cutting particle size has slightly increased.
作者
梁志涛
李峰
韩虎
王延超
纪祥飞
LIANG Zhitao;LI Feng;HAN Hu;WANG Yanchao;JI Xiangfei(School of Intelligent Manufacturing and Intelligent Transportation,Suzhou City University,Suzhou 215104,China;School of Mechanical and Vehicle Engineering,Linyi University,Linyi 276000,China)
出处
《有色金属工程》
CAS
北大核心
2024年第3期133-138,167,共7页
Nonferrous Metals Engineering
基金
山东省自然科学基金项目(ZR2023QE100)。
关键词
数值分析
水力旋流器
湍流强度
分级精度
numerical analysis
hydrocyclone
turbulence intensity
separation accuracy
