The Spanwise Dependence of Vortex-Shedding From Yawed Circular Cylinders

作者：Hogan James D; Hall Joseph W^*

来源：Journal of Pressure Vessel Technology-Transactions of the ASME, 2010, 132(3): 031301.

DOI：10.1115/1.4000732

Simultaneous measurements of the fluctuating wall pressure along the cylinder span were used to examine the spanwise characteristics of the vortex-shedding for yaw angles varying from alpha=60 deg to alpha=90 deg. The Reynolds number based on the diameter of the cylinder was 56,100. The results indicate that yawing the cylinder to the mean flow direction causes the vortex-shedding in the wake to become more disorderly. This disorder is initiated at the upstream end of the cylinder and results in a rapid decrease in correlation length, from 3.3D for alpha=90 deg to 1.1D for alpha=60 deg. The commonly used independence principle was shown to predict the vortex-shedding frequency reasonably well along the entire cylinder span for alpha>70 deg, but did not work as well for alpha=60 deg. [DOI: 10.1115/1.4000732]

• 出版日期2010-6