EXPERIMENTAL-OBSERVATIONS ON FLOW PATTERNS AND ENERGY-LOSSES FOR OSCILLATORY FLOW IN DUCTS CONTAINING SHARP EDGES
EXPERIMENTAL-OBSERVATIONS ON FLOW PATTERNS AND ENERGY-LOSSES FOR OSCILLATORY FLOW IN DUCTS CONTAINING SHARP EDGES
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DOI：
10.1016/0009-2509(89)87022-8
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发表时间：
1989-01-01
影响因子：
4.7
通讯作者：
THOMPSON, JW
中科院分区：
文献类型：
--
作者：
BRUNOLD, CR;HUNNS, JCB;THOMPSON, JW
我们报告的实验观察的流动模式和能量损失的振荡流的几何形状，可以包含尖锐的边缘。选择具有矩形或圆柱形横截面的“U”形压力计布置。尖锐的边缘被引入作为直角弯曲或折流板插入物，并且流体振荡作为从预设的起始高度的周期性衰减振幅而发生。流动可视化观察清楚地表明，大尺度的涡流混合可以产生在尖锐的边缘之间的区域。来自测量的表面高度衰减的信息使得能够确定相关的粘性和涡流耗散能量损失。
We report experimental observations on both flow patterns and energy losses for oscillatory flow in geometries that can contain sharp edges. A ‘U’ shaped manometer arrangement is chosen with either a rectangular or cylindrical cross section. Sharp edges are introduced either as right-angled bends or baffled inserts and fluid oscillation occurs as a periodically decaying amplitude from a preset starting height. Flow visualization observations show clearly that large scale eddy mixing can be generated in regions between sharp edges. Information from the measured surface height decay enables associated viscous and eddy dissipation energy losses to be determined.