| 潘凤娟，郭雪岩，杨 帆.基于大涡模拟方法的旋流过滤器内流场数值模拟[J].轻工机械,2016,34(3): |
| 基于大涡模拟方法的旋流过滤器内流场数值模拟 |
| umerical Simulation on Flow Characteristics of Filtering Hydrocyclone Based on LES |
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| DOI：10.3969/j.issn.1005-2895.2016.03.006 |
| 中文关键词: 分离过滤技术 旋流过滤器 流场特征 大涡模拟( LES) |
| 英文关键词:separation and filtration technology filtering hydrocyclone flow characteristics large eddy simulation ( LES) |
| 基金项目:国家最自科学基金(51176127)；高等学校博士学科点专项科研基金(20123120110009)；上海市教委科研创新项目
(12Y2096)；上海市科委科研计划项目(13D22260900) |
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| 摘要点击次数: 1866 |
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| 中文摘要: |
| 旋流过滤器在设计改进过程中，缺少对旋流过滤器和传统旋流器内流场的对比分析，且多孔介质阻力对流场影响的研究也较少，针对这一问题，文章选用大涡模拟( LES)方法对传统旋流器和不同多孔介质阻力下的旋流过滤器流场进行了数值模拟。得到了不同多孔介质阻力对旋流过滤器的轴向速度、切向速度、径向速度、静压、涡量及Q值的影响规律，并与传统旋流器内流场进行对比，获得了旋流过滤器流场内丰富的流动信息。结果表明与传统旋流器相比，旋流过滤器最大切向速度和压降减小；随多孔介质区域阻力的减小，最大切向速度和压降也随之减小。旋流过滤器减弱了旋流强度，增加了过滤能力，其内流场受多孔介质区域阻力影响较大。 |
| 英文摘要: |
| For lack of studies about the influence of porous media resistance on the flow field and comparative analyses on
the flow characteristics between a filtering hydrocyclone and a traditional hydrocyclone, a large eddy simulation ( LES)
method was used to simulate the flow characteristics of a filtering hydrocyclone. The fields of axial velocity, tangential
velocity, radial velocity, static pressure. and vorticity and Q criterion in the filtering hydrocyclones with different porous
media resistance were obtained. The results show that the maximum tangential velocity and pressure drop are reduced
compared with the traditional hydrocyclone. With the decrease of the resistance of the porous media. the maximum
tangential velocity and pressure drop are also decreased. The filtering hydrocyclone improves the filtration capacity and
decreases the swirling intensity. The flow field of the filtering hydrocyclone can be influenced by the porous media
resistance . |
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