Separation angle effect on vortex shedding frequency
Abstract
A description is presented of the results of an experimental investigation, which was carried out to evaluate the frequency of vortex shedding from two-dimensional bluff bodies whose boundary layers separation angles ranged from 0 to 90 deg to the oncoming flow. The experiments were carried out in an open water channel. The length of the channel is about 4.5 m, and its working section is 0.35 m. A hot wire anemometer was used for vortex shedding measurements. A typical pattern of the averaged power spectrum of the fluctuating velocity for eight test models and the vortex shedding frequencies are shown in a graph. On the basis of the obtained results, it is concluded that the strength of vortices increases with the separation angle. The regularity of the vortex shedding frequency is found to be greater for the test models with high values for the separation angle.
- Publication:
-
Journal of the American Society of Civil Engineers
- Pub Date:
- October 1982
- Bibcode:
- 1982JASCE.108..999C
- Keywords:
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- Bluff Bodies;
- Boundary Layer Separation;
- Strouhal Number;
- Vortex Shedding;
- Hot-Wire Anemometers;
- Reynolds Number;
- Fluid Mechanics and Heat Transfer