水力旋流器对磨料分离的CFD模拟研究
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摘要
针对水力旋流器内流场复杂、磨料颗粒间分离规律难以掌握的问题,运用基于计算流体力学和离散相模型理论对水力旋流器内部流场和磨料颗粒的运动规律进行了模拟研究,分析了在不同进口速度下水力旋流器内部静态压力分布、切向速度分布、轴向速度分布和不同密度、粒径的磨料颗粒的运动轨迹等。模拟结果表明,通过改变进口速度可以使水力旋流器内部流场的静态压力、切向和轴向速度,可以改变下部出口流出的磨料颗粒的直径的大小。对水力旋流器在磨料水射流除鳞后的磨料的回收利用方面具有指导意义。
Due to the complexity of the fluid field in hydrocyclone and the difficulty of mastering the law of separation between solid particles,the theories of computational fluid dynamics and the discrete phase model are used to simulate the fluid field in hydrocyclone and the motion law of particles. The static pressure distribution,and the tangential velocity,and the axial velocity distribution are analyzed under different inlet velocity of the hydrocyclone. The motion trajectory of particles with different density and diameter are analyzed under different inlet velocity. The results show that the static pressure,the tangential velocity and the axial velocity of the internal flow field of the hydrocyclone can be influenced by changing the inlet velocity,which can change the diameter of the particles excluding from the bottom outlet. The results can guide the abrasive particles recycling of abrasive water jet descaling by hydrocyclone.
Due to the complexity of the fluid field in hydrocyclone and the difficulty of mastering the law of separation between solid particles,the theories of computational fluid dynamics and the discrete phase model are used to simulate the fluid field in hydrocyclone and the motion law of particles. The static pressure distribution,and the tangential velocity,and the axial velocity distribution are analyzed under different inlet velocity of the hydrocyclone. The motion trajectory of particles with different density and diameter are analyzed under different inlet velocity. The results show that the static pressure,the tangential velocity and the axial velocity of the internal flow field of the hydrocyclone can be influenced by changing the inlet velocity,which can change the diameter of the particles excluding from the bottom outlet. The results can guide the abrasive particles recycling of abrasive water jet descaling by hydrocyclone.
引文
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[8]蒋明虎,刘道友,赵立新,等.锥角对水力旋流器压力场和速度场的影响[J].化工机械,2011,38(5):572-576.
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[10]DELAGADILLOJ A,RAJAMANI R K.A comparative study of three turbulence-closure models for the hydrocyclone problem[J].International Journal of Mineral Processing,2005,77(4):217-230.
[11]喻黎明,邹小艳,谭弘,等.基于CFD-DEM耦合的水力旋流器水沙运动三维数值模拟[J].农业机械学报,2016,47(1):126-132.
[12]KELSALL D F.A Study of the Motion of Solid Particle in a Hydraulic Cyclone[J].Trans.Instn.Chem.Eng.1952,30:87-108.
[2]蒋基安,赵天彪,杨兴华,等.基于CFD的多锥段旋流器内部流场的数值模拟[J].现代矿业,2013,29(11):21-24.
[3]许妍霞,唐波,宋兴福,等.水力旋流器内部流场模拟分析与PIV验证[J].华东理工大学学报:自然科学版,2013,39(1):1-7.
[4]蒋基安,赵天彪,杨兴华,等.基于CFD的多锥段旋流器内部流场的数值模拟[J].现代矿业,2013,29(11):21-24.
[5]CULLIVAN J C,WILLIAMS R A,DYAKOWSKI T,et al.New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics[J].Minerals Engineering,2004,17(5):651-660.
[6]张丹,陈晔.锥角对固-液水力旋流器流场及其分离性能的影响[J].流体机械,2009,37(8):11-16.
[7]崔瑞,王光辉,李茂林.锥体结构对水力旋流器内流场及分离性能的影响[J].矿山机械,2014(4):83-87.
[8]蒋明虎,刘道友,赵立新,等.锥角对水力旋流器压力场和速度场的影响[J].化工机械,2011,38(5):572-576.
[9]BHASKARK U,MURTHY Y R,RAJU M R,et al.CFD simulation and experimental validation studies on hydrocyclone[J].Minerals Engineering,2007,20(1):60-71.
[10]DELAGADILLOJ A,RAJAMANI R K.A comparative study of three turbulence-closure models for the hydrocyclone problem[J].International Journal of Mineral Processing,2005,77(4):217-230.
[11]喻黎明,邹小艳,谭弘,等.基于CFD-DEM耦合的水力旋流器水沙运动三维数值模拟[J].农业机械学报,2016,47(1):126-132.
[12]KELSALL D F.A Study of the Motion of Solid Particle in a Hydraulic Cyclone[J].Trans.Instn.Chem.Eng.1952,30:87-108.