Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental investigation of the boundary layer transition over surface irregularities
Submission Author:
Rafael Estorniolo , SP , Brazil
Co-Authors:
Rafael Estorniolo, Felipe Oliveira Aguirre, Victor Barcelos Victorino, Marcello Augusto Faraco de Medeiros
Presenter: Victor Barcelos Victorino
doi://10.26678/ABCM.COBEM2023.COB2023-2271
Abstract
Nowadays, with an ever-growing focus on environmental sustainability and cost-effectiveness, it has become essential to comprehend the impact of surface irregularities on the boundary layer transition. This is particularly important when considering the rise in friction drag due to turbulent boundary layers, which can significantly impact the performance and efficiency of aerodynamic surfaces. Thus, this paper presents an experimental investigation that aims to shed light on the differences in the boundary layer transition process induced by bumps and gaps. By comparing the natural and bypass transition processes, using hot-wire anemometry and a Preston tube, this study provides insights into the behavior of flow over surface irregularities. The experiments were conducted in the low acoustic noise and turbulence wind tunnel of the University of São Paulo (LANT - EESC/USP). The model employed is a flat plate with a chord of 2.32m and an insert that forms the gap and the bump. The findings of this study have implications for the design of aerodynamic surfaces. Therefore, this study contributes to the development of more efficient and sustainable solutions for various engineering applications, making it a crucial step forward in the field of aerodynamics.
Keywords
Boundary Layer Transition, Surface Irregularities, bumps, Gaps
