东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (9): 1343-1346.DOI: -

• 资源与土木工程 • 上一篇    下一篇

旋流器内空气柱形成及其影响因素的数值模拟

崔宝玉1，魏德洲1，李明阳1，FENGYuqing2   

  1. (1东北大学资源与土木工程学院，辽宁沈阳110819;2CSIRO Mathematics， Informatics and Statistics，维多利亚州墨尔本3169)
  • 收稿日期:2013-02-20 修回日期:2013-02-20 出版日期:2013-09-15 发布日期:2013-04-22
  • 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 Simulation of Air Core Forming Inside Hydrocyclones and Its Influencing Factors

CUI Baoyu1， WEI Dezhou1， LI Mingyang1， FENG Yuqing2   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. CSIRO Mathematics， Informatics and Statistics， Melbourne 3169， Australia.
  • Received:2013-02-20 Revised:2013-02-20 Online:2013-09-15 Published:2013-04-22
  • Contact: WEI Dezhou
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摘要： 利用CFD方法，基于RSM雷诺应力模型和VOF多相流模型对旋流器内空气柱进行数值模拟，结果显示在t≈07s，空气柱基本成型，且最终结果与PIV测试结果一致.旋流器内空气柱的空气是从沉砂口吸入并从溢流口排出.在沉砂管上端，空气柱发生大幅度的径向偏摆；空气柱进入溢流管后，产生“喉结”状突起.空气柱确实消耗了一部分不必要的能量，但并不对流场造成明显的额外扰动.给矿速度的变化对空气柱的直径几乎没有影响，而旋流器结构参数的变化，如沉砂口直径、溢流口直径、锥角等，对空气柱直径影响较大.

关键词: 水力旋流器, 空气柱, 数值模拟, PIV流场测试, 影响因素

Abstract: Numerical simulation of air core formation inside hydrocyclones was carried out by using a commercial computational fluid dynamics(CFD)modeling software package ANSYS/Fluent based on the Reynolds stress model(RSM)for the turbulence calculation and volume of fluid(VOF)model for capturing the airliquid interface. The numerical simulation shown that the air core formed when the time was 07s，which was in good agreement with the physical experiment conducted at a similar condition. The air of the air core entered the hydrocyclone from the underflow outlet and exhausted from the overflow outlet. The largest swing of the air core occurred in the region close to the underflow area，and a protuberance resembling the Adam′s apple appeared when the air core entered the overflow pipe. Unnecessary energy was consumed， but no extra perturbation was brought into the flow field by air core. Under current design and operation conditions， the structural parameters such as overflow and underflow outlet diameter and cone angle have more significant effects on the air core diameter than the operational parameter like the feeding rate.

Key words: hydrocyclone, air core, numerical simulation, PIV flow field measurements, influencing factor

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