突缩和分叉复合管内二维速度场分布的实验研究  

Liquid Flow Field Measurement in a Tube with a Combination of Stenosis and Bifurcation

作　　者：张超杰[1] 张鸣远[1] 朱宪然[1] 杨建[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《生物医学工程学杂志》2006年第5期944-946,共3页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(59876032);国家振兴教育行动计划流体机械及工程项目

摘　　要：采用折射率匹配技术,应用激光多普勒测速仪对突缩和分叉复合管内的液体二维速度场进行了测量。当旁路和主管的流量比为4∶1时,在两管道轴线组成的水平面内,汇流后轴向速度呈不对称双峰状,流动偏向正对旁路来流的主管道壁面一侧。在铅垂面内,轴向速度分布呈M型。在管道横截面内,存在着一对方向相反的漩涡结构,在汇流中心区域最为明显。Two-D liquid velocity field in a tube with a combination of a stenosis and a bifurcation was measured with refractive index matching technique using Laser Doppler Velocimeter （LDV）. The flow ratio of main tube to bypass was 1 .＂ 4. It is found that the axial velocity profile has two peaks in the XOY plane which is skewed to the main tube wall facing the flow from the bypass, and it manifests itself in the form of ＂M＂ in the XOZ plane. A two counter-rotating vortices in the main tube cross section downstream the conjunction region is also detected.

关 键 词：激光多普勒测速仪 折射率匹配技术 突缩和分叉复合管 速度场测量 

分 类 号：R318.01[医药卫生—生物医学工程]