东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (6): 894-897.DOI: 10.12068/j.issn.1005-3026.2014.06.030

• 资源与土木工程 • 上一篇    下一篇

水力旋流器内部流场的数值研究

崔宝玉1，魏德洲1，翟庆祥1，张思瑶2   

  1. (1 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2 沈阳市气象局 沈阳市气象服务中心， 辽宁 沈阳110168)
  • 收稿日期:2013-05-30 修回日期:2013-05-30 出版日期:2014-06-15 发布日期:2014-04-11
  • 通讯作者: 崔宝玉
  • 作者简介:崔宝玉(1982-)，男，山东烟台人，东北大学博士研究生;魏德洲(1956-)，男，河南南阳人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(50974033，51104035)；中央高校基本科研业务费专项资金资助项目(N100301002).

Numerical Study on Internal Flow Field of Hydrocyclone

CUI Baoyu1， WEI Dezhou1， ZHAI Qingxiang1， ZHANG Siyao2   

  1. 1School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2Shenyang Weather Service Centre， Shenyang Meteorological Bureau， Shenyang 110168， China.
  • Received:2013-05-30 Revised:2013-05-30 Online:2014-06-15 Published:2014-04-11
  • Contact: WEI Dezhou
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摘要： 在PIV实验验证的基础上，利用RSM雷诺应力模型和VOF两相流模型对50mm水力旋流器内部流场进行了系统的数值研究.结果表明:旋流器内静压从器壁至中心逐渐下降，静压为0处即为空气柱边界，空气柱内为负压，空气柱的存在增加了分级过程的能量消耗；旋流器内切向速度分布符合组合涡特征，内部为强制涡运动，外部为半自由涡运动；零速包络面是轴向速度方向发生改变的转折面，其上部为柱形，下部为锥形，柱形段直径约为溢流管的23倍；在外旋流区域径向速度方向从旋流器器壁指向中心，内旋流区域存在方向相反、位置相对的径向速度，空气柱内径向速度基本为0.

关键词: 水力旋流器, 数值模拟, PIV流场测试, 压力分布, 速度分布

Abstract: By using RSM(Reynolds stress model)turbulence model and VOF(volume of fluid)twophase flow model， systematic numerical study on internal flow field of 50 mm hydrocyclone was carried out， which had been validated by PIV(particle image velocimetry)measurement results. It shows that internal static pressure of hydroclone gradually declines from wall to center， the static pressure is zero at the boundary of air core， the interior of air core is negative pressure， and additional energy is consumed by air core when the hydrocyclone works. Tangential velocity distribution could be regarded as a combined vortex， inside is forced vortex and outside is quasifree vortex. The envelope of zero vertical velocity is a turning surface of axial velocity change， its upside is cylinder and its lower part is cone. The diameter of the cylindrical section is 23 times as large as overflow outlet diameter. Radial velocity direction is from the wall of the hydrocyclone toward the center in the outer vortex area， radial velocities of opposite direction and relative position exist in the inner vortex area， and radial velocity inside air core is almost zero.

Key words: hydrocyclone, numerical simulation, PIV flow field measurements, pressure distribution, velocity distribution

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