NUMERICAL SIMULATION OF TURBULENT FLOW IN A HYDROCYCLONE

Dai Guangqing; Li Jianming and Chen Wenmei( Sichuan Union University State Key Hydraulics Laboratory of High Speed Flows; Chendu 610065 )

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NUMERICAL SIMULATION OF TURBULENT FLOW IN A HYDROCYCLONE

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- NUMERICAL SIMULATION OF TURBULENT FLOW IN A HYDROCYCLONE
- CIESC Journal Issue 1, (1997)
- 作者机构：
  
  四川联合大学高速水力学国家重点实验室,四川联合大学高速水力学国家重点实验室,四川联合大学高速水力学国家重点实验室成都 610065,成都 610065,成都,610065
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q018
- Online First：25 February 1997，
  
  Published：25 February 1997
- 稿件说明：
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Dai Guangqing, Li Jianming and Chen Wenmei( Sichuan Union University State Key Hydraulics Laboratory of High Speed Flows, Chendu 610065 ). NUMERICAL SIMULATION OF TURBULENT FLOW IN A HYDROCYCLONE[J]. CIESC Journal, 1997, (1).
DOI：

Dai Guangqing, Li Jianming and Chen Wenmei( Sichuan Union University State Key Hydraulics Laboratory of High Speed Flows, Chendu 610065 ). NUMERICAL SIMULATION OF TURBULENT FLOW IN A HYDROCYCLONE[J]. CIESC Journal, 1997, (1). DOI：

摘要

引言水力旋流器作为一种简便、易行和高效率的分离、分级和离心沉降设备

已被广泛应用于化工、冶金、石油等众多工业领域中.以往的水力旋流器设计主要是根据大量物理模型试验得出的经验准数方程来求出旋流器的几何结构参数和操作参数.然而

随着水力旋流器应用范围的迅速扩大和人们对其分离(级)性能指标的要求日益提高

传统的按经验或半经验公式进行旋流器设计方法的局限性越来越明显

以及物模试验的耗时费钱

已促使人们开始采用数值模拟的方法

通过对旋流器内部流体运动的深入研究

弄清旋流器的分离机理

以便为提高水力旋流器的分离效率和分级准确度予以理论指导.本文采用了适于水力旋流器液相(水)流场的K-ε湍流数学模型

对水力旋流器内的湍流运动规律进行了数值模拟并根据激光实测结果对部分模型常数进行了修正.

Abstract

The 3-D flow field with a central air core in a hydrocyclone is simulated by K-ε. turbulent model in the present paper. The model constants C1

and Cμ are modified because ofthe anisotropic character of turbulent viscosity in the hydrocyclone. The numerical prediction has been tested against the LDA measurement results and has been found to perform well. Based on the prediction

the flow field and the pressure field as well as the distribution of the dissipation rate of the turbulent energy are discussed. The study shows that an important approach to reduce energy dissipation in the hydrocyclone is to improve the flow pattern in the cylindrical section.

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