Experimental Study of Near Wake Flow Behind a Rectangular Cylinder | Science Publications

American Journal of Applied Sciences

Noorallah Rostamy¹  Abdollah Shadaram¹  Mahdi A. Fard¹ 

关键词: Hot wire;    rectangular cylinder;    near wake;    spectral analysis;   

DOI  :  10.3844/ajassp.2008.917.926

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

The turbulence characteristics of the near wake flow behind a rectangular cylinder is investigated in a two-dimensional analysis using a hot-wire anemometer. The time-averaged and fluctuating components of thevelocity are measured for a cylinder having various width-to-height (b h^-1) ratios. The measurements are carried out in a low-speed wind tunnel. Data from hot-wire anemometer is collected by a data acquisition system. The results show that the turbulence intensity in the flow wake decreases as the width-to-height ratio of the cylinder increases. In addition, the characteristics of the flow field in a few sections are evaluated. Spectral analysis of the velocity signals is carried out for two different Reynolds numbers. The spectral analysis shows that Strouhal number remains nearly constant in high Reynolds numbers. The results of present experiments are in close agreement with the most widely accepted results in the literature.

【 授权许可】

Unknown