The Brazilian Silent Aircraft Program (Programa "Aeronave
Silenciosa) is an initiative of six Brazilian Universities and
Institutes (USP-Poli "University of Sao Paulo - Polytechnic
School, USP/EESC - University of Sao Paulo - Sao Carlos Engineering
School, UFSC - Federal University of Santa Catarina, UFU - Federal
University of Uberlandia, UnB - University of Brasilia and IAE -
Brazilian Institute of Aeronautics and Space) together with Embraer
to develop methodologies and solutions for the aircraft external
noise problem.
The main goal of this initiative is to study and develop
methodologies that will allow estimation of aircraft noise
generation and propagation through three main approaches: numerical
simulation (CAA), analytical and semi-empirical models, and wind
tunnel and flight tests.
The intention has been to create a joint effort including
Brazilian aerodynamic and acoustic researchers to explore and
integrate the three approaches, opening up the possibility for a
new technological level in this area in Brazil. Therefore, the
objective now is to integrate and consolidate aerodynamic and
acoustic research efforts to encourage a stable, continuous and
profound development.
This program started to be organized in 2005, with a project
kick-off in 2008. It is sponsored by Embraer, Fapesp (Sao Paulo
Research Foundation) and Finep (Brazilian Innovation Agency). Since
the beginning, up to total of 90 Brazilian researchers,
undergraduate, post-graduate students and engineers have been
involved in the program and a lot of important results have been
produced.
The objective of this lecture is to present the technical
challenges that the program had to overcome and give an overview of
the results that have been produced.
