STROUHAL NUMBERS OF RECTANGULAR CYLINDERS
STROUHAL NUMBERS OF RECTANGULAR CYLINDERS
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DOI：
10.1017/s0022112082003115
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发表时间：
1982-01-01
影响因子：
3.7
通讯作者：
OKAJIMA, A
中科院分区：
文献类型：
--
作者：
OKAJIMA, A
在风洞和水箱中对不同矩形圆柱的旋涡脱落频率进行了实验研究。结果表明，在雷诺数为70~2×10~4的范围内，Strouhal数随圆柱宽高比的变化规律。对于宽高比分别为2和3的圆柱体，存在一定的雷诺数范围，在该范围内，流型突变，斯特劳哈尔数突变。通过速度分布测量和流动显示，证实了与Strouhal数不连续相对应的流型变化。这些数据与其他调查人员的数据进行了比较。实验结果与数值计算结果吻合较好。
Experiments on the vortex-shedding frequencies of various rectangular cylinders were conducted in a wind tunnel and in a water tank. The results show how Strouhal number varies with a width-to-height ratio of the cylinders in the range of Reynolds number between 70 and 2 × l04. There is found to exist a certain range of Reynolds number for the cylinders with the width-to-height ratios of 2 and 3 where flow pattern abruptly changes with a sudden discontinuity in Strouhal number. The changes in flow pattern corresponding to the discontinuity of Strouhal number have been confirmed by means of measurements of velocity distribution and flow visualization. These data are compared with those of other investigators. The experimental results have been found to show a good agreement with those of numerical calculations.