Re-Circulating Flows Associated with Two-Dimensional Steps
Re-Circulating Flows Associated with Two-Dimensional Steps
复制标题
与二维台阶相关的再循环流
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
S. Baker
中科院分区：
文献类型：
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作者：
W. Moss;S. Baker
本文介绍了在分离流区与三个简单的尖锐的二维几何形状，一个面向后的步骤，一个面向前的步骤和一个矩形块。脉冲线风速计的使用使得测量平均速度和湍流的三个分量成为可能;早期的技术，如热线风速计，不太适合于在连续反向流动的区域（如再循环区）或在非常高的湍流区域（如边界这些区域的剪切层）中精确确定这些量。还提供了表面压力和剪切应力的补充测量，并将这些剪切层与平面混合层进行了比较。这项工作形成了海崖体流动调查扩展方案的第一部分，但其主要的直接价值可能有助于提供数据，以检验湍流数学模型应用于再循环流动的有效性。
This paper describes measurements made in the regions of separated flow associated with three simple sharpedged two-dimensional geometries, a rear-facing step, a front-facing step and a rectangular block. The use of the pulsed-wire anemometer made possible the measurement of the three components of mean velocity and turbulence; earlier techniques, such as the hot-wire anemometer, were not well suited to the accurate determination of these quantities either in regions of continually reversing flows such as the re-circulatory zone or in regions of very high turbulence such as the shear layers bounding these zones. Supplementary measurements of surface pressure and shear stresses are also presented and comparison is made between these shear layers and the plane mixing layer. The work forms the first part of an extended programme for the investigation of bluff body flows but its principal immediate value will probably help in providing data with which to test the validity of mathematical models of turbulence as applied to re-circulating flows.