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INTERSECTING DUCTS: FLOW VISUALIZATION METHODS

机译:相交管道:流量可视化方法

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摘要

The flow in the intersecting region of two streams inside an X-shaped flow network is complex due to combined results of the ramming phenomena and the centrifugal force induced by the flow passage geometry. In order to determine the flow mechanisms, this study applies a combination of (1) the particle tracing method to observe streamlines, (2) the string method to visualize flow oscillations downstream from the intersecting region, and (3) the bubble tracer method to measure velocity vectors with the aid of particle image processing. Both the symmetric and asymmetric flows between the two branches are investigated. The intersecting angle and flow rates are varied to determine their effects on flow behavior. Flow oscillations in the downstream branches are found to be related to vortex formation.
机译:由于夯实现象和由流动通道几何形状引起的离心力的综合结果,X形流动网络内部两个流的相交区域中的流动很复杂。为了确定流动机理,本研究将以下两种方法结合使用:(1)粒子追踪法观察流线;(2)串法可视化相交区域下游的流动振荡;(3)气泡示踪法借助粒子图像处理来测量速度向量。研究了两个分支之间的对称和非对称流动。改变相交角和流速以确定它们对流动行为的影响。发现下游分支中的流动振荡与涡流形成有关。

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  • 作者

    S. Umeda; Wen-Jei Yang;

  • 作者单位

    Department of Civil Engineering, Fukuyama University, Hiroshima, Japan;

    Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan 48109;

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  • 正文语种 eng
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