Geração de ruído por jatos turbulentos

A critical review of the principal theories of aerodynamical generation of sound and of some expansions for the source terms is presented. The principal properties of the flow and sound fields of a turbulent jet are commented. It is shown that, to obbey energy conservation, the shear noise/self noise model requires interference between the two types of terms to occur. The importance of source coherence in the sound field is discussed, and some evidences against this hypothesis are raised. Far field sound pressure correlations are examined and modelled in a very simple form. It is shown that experimental results agree with the hypothesis that turbulence, as anacoustic source, is equivalent to a distribution of lateral qui drupoles.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

1984

Author dc:creator

• Musafir, Ricardo Eduardo

Advisor dc:contributor.advisor

• Zindeluk, Moysés

• Aeronaves
• Acústica
• Aerodinâmica de aeronaves

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/3704

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/3704