Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
WAKE INTERACTION BETWEEN TWO CIRCULAR SLENDER CYLINDERS TANDEM PLACED WITH SMALL SPACING RATIOS
Submission Author:
Patrick Habowski , RS , Brazil
Co-Authors:
Patrick Habowski, Adriane Prisco Petry, Sergio Viçosa Möller
Presenter: Sergio Viçosa Möller
doi://10.26678/ABCM.COBEM2023.COB2023-1287
Abstract
The present article is an experimental investigation of two circular cylinders tandem assembled inside a wind tunnel. The cylinder setup is free to oscillate in the lateral direction and was mounted distancing the cylinder’s centers by a longitudinal distance L. Three L/D spacing ratios varying the imposed flow velocity were tested, where D is the cylinder diameter, generating Reynolds numbers in the range of 9.6 to 16.6 × 10³. To study the wake interaction between the cylinders, the lateral acceleration was measured by two accelerometers positioned inside both cylinders. In addition, two hot-wire anemometers were assembled behind the downstream cylinder to monitor the wake velocity in the bottom and middle height of the downstream cylinder. Post-processed results of the acquired signals were performed by Matlab software using Fourier and wavelet analysis. The main results presented the highest levels of oscillation for the configuration with the smaller proposed L/D spacing ratio of 3. High fluctuation values were observed in the wake flow velocity results of the anemometer located at the middle height of the downstream cylinder due to the lateral oscillation. The predominant frequency observed in the lateral movement was 2.4 Hz. Strouhal numbers identified the vortex shedding of the downstream cylinder.
Keywords
Circular Cylinders, energy harvesting, Statistical Analysis, Turbulent flow, Wind Tunnel
