摘要
为深入探讨旋流段的流场分布及旋流分离的作用机理,以粒子图像测速系统(PIV)为基础构建了浮选柱旋流段的流场测试平台,利用PIV测试平台和Fluent数值模拟软件对旋流段内部的速度场进行了测试与数值模拟,研究了旋流段的速度分布规律以及循环量变化对速度分布规律的影响。结果表明,流场速度以切向速度为主,且有着明显的分布规律,径向速度比较小且分布比较复杂,轴向速度相对径向速度较大,速度分布呈对称分布;随着循环量的提高,轴向速度的零点向中心靠拢,而最大值出现在相近的半径位置。数值模拟结果和实验结论吻合度较高。
In order to study of the flow field distribution and separation mechanism of cyclone section, the PI~ test platform for cyclone section of flotation column was built base on the particle image velocimetry system （PIV） test in this paper. The velocity field in the cyclone section was tested particularly and numerical simulated using the PIV test platform and the numerical simulation software of Fluent. The velocity distribution regularity in the cyclone section was investigated. The influence of the velocity distribution which was impacted by circulation volume was researched. The results show that the tangential velocity is major part of the flow velocity and the distribution is regular. The radial ve- locity is small and the distribution is complex. The axial velocity is bigger than radial velocity. The velocity distribution is symmetrical distribution. With circulation volume increase, the zero point of axial velocity close to the center and the radius of the maximum value appear in the close position. The numerical simulation results are the same as the result of PIV test.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2014年第A01期212-218,共7页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51104158)
中国矿业大学(北京)博士研究生拔尖创新人才培育基金资助项目(00015Z633)
江苏省普通高校研究生科研创新计划项目(CXLX13_954)
关键词
PIV测试
速度分布
浮选柱
旋流场
PIV test
velocity distribution
flotation column
cyclonic flow field
