Avaliação numérica da recuperação de pressão e distorção de escoamentos através de dutos em forma de S

• Ano de defesa: 2018
• Autor(a) principal: Leandro Souza de Moura Lima
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ENG - DEPARTAMENTO DE ENGENHARIA MECÂNICA; Programa de Pós-Graduação em Engenharia Mecanica; UFMG
• Palavras-chave em Português: Dutos em S; Entradas de ar; CFD; Engenharia mecânica; Mecânica dos fluidos; Método dos elementos finitos; Fluidodinâmica computacional (CFD)
• Link de acesso: http://hdl.handle.net/1843/32511

In this thesis, the accuracy of CFD simulations is evaluated when applied to the prediction of the airflow through S-shaped air inlets. Compressible Reynolds-average Navier-Stokes computations are conducted for the AIAA 3 rd Propulsion Aerodynamic Workshop S-shaped duct test case, in a clean configuration and also with a single row of vortex generators. The numerical simulations are performed using the CFD++ software and a hybrid grid. The influence of modelling the geometric representation of the probe instrumentation is investigated by considering the rake fairing geometry and also the geometry of the complete rake with the probes. Some aspects of the probe modelling are also discussed. The experiment mass flow rate is estimated allowing a direct comparison of the numerical simulation results with the experimental values, such as the wall static pressure along the duct and total pressure recovery and distortion indices at the aerodynamic interface plane. Three eddy-viscosity turbulence models are evaluated: the one-equation Spalart-Allmaras, and the two-equation realizable k-ε and shear stress transport models. A virtual 200-probe rake is also proposed, beyond the standard 40-probe rake, to enrich the comparison of the total pressure recovery and distortion indices. It is observed an overall good agreement between experimental results and the numerical wall static pressure and the total pressure topology at the aerodynamic interface plane. Some discrepancies for the distortion indices are observed and discussed in detail.