Experiments were carried out in a recirculating water channel regarding the flow around stationary circular cylinders with low aspect ratio piercing the water free surface. Eight different aspect ratios were tested, namely L/D = 0.1, 0.2, 0.3, 0.5, 0.75, 1.0, 1.5 and 2.0; this range corresponds to aspect ratio related to circular offshore systems, such as spar and monocolumn platforms. Force was measured using a six degree-of-freedom load cell and Strouhal number is inferred through the transverse force fluctuation frequency. The range of Reynolds number covers 10,000 < Re < 50,000. PIV measurements were performed in some aspect ratio cases, namely 0.3, 0.5, 1.0 and 2.0 for Reynolds number equal to 43,000. The results showed a decrease in drag force coefficients with decreasing aspect ratio, as well as a decrease in Strouhal number with decreasing aspect ratio. The PIV showed the existence of an arch-type vortex originated in the cylinder free end.
Experimental Study on Flow Around Circular Cylinders With Low Aspect Ratio
- Views Icon Views
- Share Icon Share
- Search Site
Gonçalves, RT, Rosetti, GF, Franzini, GR, & Fujarra, ALC. "Experimental Study on Flow Around Circular Cylinders With Low Aspect Ratio." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 7: CFD and VIV. Nantes, France. June 9–14, 2013. V007T08A030. ASME. https://doi.org/10.1115/OMAE2013-10454
Download citation file: