Investigação aeroacústica de jatos subsônicos submetidos a escoamento cruzado

Abstract

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.