摘要
利用激光多普勒测速仪(LDV)对旋风分离器排气管内流场进行了全面系统的测量,发现气流的高速旋转、回流区的存在及湍流脉动是排气管内产生流动阻力损失的重要原因.安装减阻杆改变了排气管内流场分布规律,使旋转动能降低、回流区消失以及湍流脉动减弱,从而降低了排气管内流动阻力损失.减阻杆迎风截面宽度越大,绕流边缘越尖锐,排气管内切向速度就越小,轴向速度分布越均匀,分离器的减阻幅度也越大.
Laser Doppler Velocimetry (LDV) was used to measure the flow field in the exit tube of a cyclone separator. It was found that the high speed rotating flow, reverse flow region and turbulent fluctuation were contributed to the pressure loss in the exit tube. When a stick existed in the cyclone separator, the flow field in the exit tube changed, the tangential velocity turned smaller, the reverse flow region disappeared, and the turbulent fluctuation became weaker, so the pressure loss of the cyclone separator decreased. These changes were found to be related to the width and shape of the stick cross-section.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2005年第3期251-254,共4页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:10172055)
关键词
旋风分离器
排气管
流场
减阻机理
激光多普勒测速仪
cyclone separator
exit tube
flow field
pressure drop reduction
Laser Doppler Velocimetry
