Resonant interaction between periodically fluctuating flows and vortex shedding from two-dimensional rectangular cylinders
Abstract
The mechanism of the interaction is studied by employing hot-wire anemometry and by visualizing the flow at imposed frequencies near the natural vortex-shedding frequency. The measurements are made on 2D rectangular cylinders with side ratios of 0.4 and 0.5 in periodically fluctuating flows at a Reynolds number of 1.5 x 10 exp 4. Strong resonant interaction is initiated when the fluctuating flow meets certain conditions; a pitching airfoil placed at an upstream position alternately sheds vortices with opposite signs, and cylinders cause strong resonant reactions.
- Publication:
-
Flow Visualization V; Proceedings of the 5th International Symposium
- Pub Date:
- 1990
- Bibcode:
- 1990flvi.proc..371O
- Keywords:
-
- Cylindrical Bodies;
- Flow Visualization;
- Oscillating Flow;
- Resonant Frequencies;
- Two Dimensional Bodies;
- Vortex Shedding;
- Bluff Bodies;
- Fluid-Solid Interactions;
- Hot-Wire Flowmeters;
- Fluid Mechanics and Heat Transfer