Flow over Rectangular Cylinders Immersed in a Turbulent Boundary Layer : Part 2 Flow Patterns and Pressure Distributions
Flow over Rectangular Cylinders Immersed in a Turbulent Boundary Layer : Part 2 Flow Patterns and Pressure Distributions
复制标题
浸没在湍流边界层中的矩形圆柱体上的流动：第 2 部分流动模式和压力分布
DOI：
--
复制
发表时间：
1975
期刊：
影响因子：
--
通讯作者：
K. Takaoka
中科院分区：
文献类型：
--
作者：
M. Arie;M. Kiya;H. Tamura;M. Kosugi;K. Takaoka
作为上一篇文章的延续，本文描述了浸没在湍流边界层中的矩形圆柱体周围的流动模式和圆柱体表面的压力分布。详细考察了h/σ、uτ/U∞和宽高比b/h对压力分布的影响，其中b和h分别为圆柱体的宽度和高度，σ为边界层厚度，uτ为剪切速度，U∞为边界层外自由流速度。主要结果总结如下：(a)在宽高比为2.0和4.0，h/σ分别为1.13和0.554时，给出了三组平均流量和湍流度的测量结果。(b) Goertler理论上得到的等压半射流的平均速度分布。(c)气缸的基压可与h以壁律的形式相关。(d)圆柱体上游面上的压力分布可以用一条曲线表示，该曲线与宽高比和边界层特性无关。
As continuation of the foregoing paper, the present paper describes the flow patterns around the rectangular cylinders immersed in a turbulent boundary layer and the pressure distribution on the surface of the cylinders. The effect of three parameters, i.e. h/σ, uτ/U∞ and the width-to-height ratio b/h on the pressure distribution is examined in some detail, where b and h are respectively the width and height of the cylinder, σ is the boundary-layer thickness, uτ is the shear velocity and U∞ is the free- stream velocity outside the boundary layer. The main results will be summarized as follows : (a) Three sets of measurements of the mean flow and turbulence are presented for the width-to-height ratios of 2.0 and 4.0 with h/σ =1.13 and 0.554. (b) The mean velocity profile in a constant pressure half-jet theoretically obtained by Goertler. (c) The base pressure of the cylinders can be correlated with h in the form of a wall law. (d) The pressure distribution on the upstream face of the cylinders can be represented by a single curve which is irrespective of the width-to-height ratio and the boundary-layer characteristics.