Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
DEVELOPMENT OF AN EXPERIMENTAL CORRECTION MODEL FOR HORIZONTAL BUOYANCY IN THE TESTING SECTION OF THE CLOSED-CIRCUIT WIND TUNNEL AT UFMG
Submission Author:
Marina Fernandes , MG , Brazil
Co-Authors:
Marina Fernandes, Guilherme Papini
Presenter: Marina Fernandes
doi://10.26678/ABCM.COBEM2023.COB2023-2240
Abstract
Wind tunnels are classic tools used in the evaluation of aerodynamic forces and moments acting on a body. However, for the data obtained through a tunnel to be reliable, the flow in its test section must be well characterized in order to validate its correspondence with an open-air flow. The present paper aims to establish a drag correction model for the horizontal buoyancy effect present in the closed-circuit wind tunnel of the Laboratory of Experimental Aerodynamics at the Minas Gerais Federal University (UFMG) in order to approximate the results obtained in the test campaigns carried out in it to the results that would be found for an outdoor model. Primary data is obtained through pressure sensors positioned along the central line of the test section to obtain the longitudinal static pressure gradient along it, which is then used for the formulation of the correction model. Finally, a spheric model is tested in the tunnel and the experimental and theoretical results are compared for the validation of the correction model.
Keywords
Wind Tunnel, Wall effect, Horizontal Buoyancy
