Investigação do desempenho aerodinâmico de um avião de pequeno porte utilizando dinâmica dos fluidos computacional

Abstract

The present work investigates the aerodynamic performance of the Brasília aircraft (EMB120). The choice of this model is justified within the GCEME research activities in hybrid propulsion. Using OpenFOAM, simulations were developed using RANS with k − ω SST turbulence model. The simulations focused on the cruise phase, where the steady-state flow simplification is valid. It was possible to identify that the aircraft can perform adequately on cruising fase under an angle of attack in the range of 1 o to 3 o , where its center of pressure is located between 26,92% and 28,47% of the mean aerodynamic chord. The wings are the main component responsible for generating lift, while the wings and the fuselage generate most of the aerodynamic drag. Two aircraft configurations were evaluated: one with and another without geometric twist on the wings. An increase in overall drag and lift was observed for the configuration with twist, although the relationship between these forces did not change significantly. An evaluation of the equations used to initialize the turbulence parameters was conducted, where no significant difference between different formulations was observed. The influence of altitude on the aerodynamic performance of the aircraft was also investigated. No significant changes were observed in their dimensionless coefficients.