Investigação aeroacústica de jatos subsônicos submetidos a escoamento cruzado

• Autor(a) principal: Souza, Pedro Ricardo Corrêa
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/14991; https://doi.org/10.14393/ufu.di.2015.431
• topic: Aeroacústica; RANS; Jatos submetidos a escoamento cruzado; Escoamento instável (Dinâmica dos fluidos); Aeroacoustics; Jet in crossflow; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA

The present work refers to the characterization of the sound field generated by subsonic jets in crossflow (JICF). This phenomenon that results from a jet of fluid discharged perpendicularly to a moving medium has a very complex, but well established, fluid dynamics and a sound field yet unexplored. For the complete characterization of this phenomenon, a hybrid methodology of low computational cost that uses a combination of commercial and open source packages is used. The fluid dynamics part is solved by the commercial code CFD ++ by Metacomp Inc. through Reynolds Average Navier-Stokes Equations (RANS), and the noise calculations are performed on an open source code using the Lighthill Ray-Tracing method (LRT). An extensive validation step is performed to demonstrate the ability and highlight the limitations of the methods used for predicting the jet s behavior. This work brings a large contribution to the development of JICF noise research by showing the existence of a region of relative silence in these jets.