Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
COMPUTATIONAL FLUID DYNAMICS (CFD) BASED APPROACHES FOR MODELING AIRCRAFT TURBOFANS
Submission Author:
Herly Aguilar Sanchez , Lima , Peru
Co-Authors:
Herly Aguilar Sanchez, Cesar Celis, Marcio Carmo Lopes Pontes
Presenter: Herly Aguilar Sanchez
doi://10.26678/ABCM.ENCIT2018.CIT18-0300
Abstract
Computational fluid dynamics ( CFD) is one of the most important tools in analysis and design of axial turbo machinery as aircraft turbofans or axial compressors. Accordingly, this work presents a review of the state-of-the-art of CFD based techniques used for modeling aircraft turbofans. These modeling include the full annulus unsteady Reynolds average Navier Stokes (URANS) simulations, the actuator disc rotating, the body force modeling, the frozen rotor model, the mixing planes model and the sliding mesh model. More specifically, comparative analysis of the advantages and limitations of the referred methodologies is thus initially presented. From the available numerical approaches, the one based on mixing planes is selected for further analysis. The rationale behind the selection of this modeling technique for carrying out turbofan-related simulations in this work for chosen is properly highlighted. Finally, numerical simulations of a GE-90 like turbofan engine are carried out using a mixing planes based model. The results obtained from the simulations are discussed in terms of mass, momentum and energy conservation, as well as in terms of entropy variations along the turbofan stage. The relative good agreement between the numerical results obtained here and those available in the literature emphasizes the suitability of the modeling approach utilized in this work.
Keywords
Aircraft turbofans, Computational Fluid Mechanics, modeling approaches, mixing planes
