A methodology for noise prediction of turbofan engines.

Detalhes bibliográficos
Autor(a) principal: Gustavo Di Fiore dos Santos
Data de Publicação: 2006
Tipo de documento: Tese
Idioma: eng
Título da fonte: Biblioteca Digital de Teses e Dissertações do ITA
Texto Completo: http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=291
Resumo: A computional model is developed for prediction of noise emission from na existing or new turbofan engine. This model allows the simulation of noise generation from high bypass ratio turbofan engines, appropriate for use with computational programs for gas turbine performance developed at ITA. Analytical and empirical methods are used for spectrum shape, spectrum level, overall noise and free-field directivity noise. The most significant noise sources in turbofan engines are modeled: fan, compressor, combustion chamber, turbine, jet (separate streams or mixed jet), with corrections for forward speed, atmospheric attenuation, ground reflection, and nacelle acoustic treatment (perforate liners). The procedures for component noise prediction are combined to yield total turbofan engine noise emission, as a funtion of engine operation condition and of observer (distance and directivity angle).
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network_name_str Biblioteca Digital de Teses e Dissertações do ITA
spelling A methodology for noise prediction of turbofan engines.AeroacústicaPredição de ruído (aeronaves)Motores TurbofanTurbinas a gásRuído aerodinâmicoEngenharia mecânicaA computional model is developed for prediction of noise emission from na existing or new turbofan engine. This model allows the simulation of noise generation from high bypass ratio turbofan engines, appropriate for use with computational programs for gas turbine performance developed at ITA. Analytical and empirical methods are used for spectrum shape, spectrum level, overall noise and free-field directivity noise. The most significant noise sources in turbofan engines are modeled: fan, compressor, combustion chamber, turbine, jet (separate streams or mixed jet), with corrections for forward speed, atmospheric attenuation, ground reflection, and nacelle acoustic treatment (perforate liners). The procedures for component noise prediction are combined to yield total turbofan engine noise emission, as a funtion of engine operation condition and of observer (distance and directivity angle).Instituto Tecnológico de AeronáuticaJoão Roberto BarbosaGustavo Di Fiore dos Santos2006-05-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesishttp://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=291reponame:Biblioteca Digital de Teses e Dissertações do ITAinstname:Instituto Tecnológico de Aeronáuticainstacron:ITAenginfo:eu-repo/semantics/openAccessapplication/pdf2019-02-02T14:01:42Zoai:agregador.ibict.br.BDTD_ITA:oai:ita.br:291http://oai.bdtd.ibict.br/requestopendoar:null2020-05-28 19:32:53.637Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáuticatrue
dc.title.none.fl_str_mv A methodology for noise prediction of turbofan engines.
title A methodology for noise prediction of turbofan engines.
spellingShingle A methodology for noise prediction of turbofan engines.
Gustavo Di Fiore dos Santos
Aeroacústica
Predição de ruído (aeronaves)
Motores Turbofan
Turbinas a gás
Ruído aerodinâmico
Engenharia mecânica
title_short A methodology for noise prediction of turbofan engines.
title_full A methodology for noise prediction of turbofan engines.
title_fullStr A methodology for noise prediction of turbofan engines.
title_full_unstemmed A methodology for noise prediction of turbofan engines.
title_sort A methodology for noise prediction of turbofan engines.
author Gustavo Di Fiore dos Santos
author_facet Gustavo Di Fiore dos Santos
author_role author
dc.contributor.none.fl_str_mv João Roberto Barbosa
dc.contributor.author.fl_str_mv Gustavo Di Fiore dos Santos
dc.subject.por.fl_str_mv Aeroacústica
Predição de ruído (aeronaves)
Motores Turbofan
Turbinas a gás
Ruído aerodinâmico
Engenharia mecânica
topic Aeroacústica
Predição de ruído (aeronaves)
Motores Turbofan
Turbinas a gás
Ruído aerodinâmico
Engenharia mecânica
dc.description.none.fl_txt_mv A computional model is developed for prediction of noise emission from na existing or new turbofan engine. This model allows the simulation of noise generation from high bypass ratio turbofan engines, appropriate for use with computational programs for gas turbine performance developed at ITA. Analytical and empirical methods are used for spectrum shape, spectrum level, overall noise and free-field directivity noise. The most significant noise sources in turbofan engines are modeled: fan, compressor, combustion chamber, turbine, jet (separate streams or mixed jet), with corrections for forward speed, atmospheric attenuation, ground reflection, and nacelle acoustic treatment (perforate liners). The procedures for component noise prediction are combined to yield total turbofan engine noise emission, as a funtion of engine operation condition and of observer (distance and directivity angle).
description A computional model is developed for prediction of noise emission from na existing or new turbofan engine. This model allows the simulation of noise generation from high bypass ratio turbofan engines, appropriate for use with computational programs for gas turbine performance developed at ITA. Analytical and empirical methods are used for spectrum shape, spectrum level, overall noise and free-field directivity noise. The most significant noise sources in turbofan engines are modeled: fan, compressor, combustion chamber, turbine, jet (separate streams or mixed jet), with corrections for forward speed, atmospheric attenuation, ground reflection, and nacelle acoustic treatment (perforate liners). The procedures for component noise prediction are combined to yield total turbofan engine noise emission, as a funtion of engine operation condition and of observer (distance and directivity angle).
publishDate 2006
dc.date.none.fl_str_mv 2006-05-29
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/doctoralThesis
status_str publishedVersion
format doctoralThesis
dc.identifier.uri.fl_str_mv http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=291
url http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=291
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Instituto Tecnológico de Aeronáutica
publisher.none.fl_str_mv Instituto Tecnológico de Aeronáutica
dc.source.none.fl_str_mv reponame:Biblioteca Digital de Teses e Dissertações do ITA
instname:Instituto Tecnológico de Aeronáutica
instacron:ITA
reponame_str Biblioteca Digital de Teses e Dissertações do ITA
collection Biblioteca Digital de Teses e Dissertações do ITA
instname_str Instituto Tecnológico de Aeronáutica
instacron_str ITA
institution ITA
repository.name.fl_str_mv Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáutica
repository.mail.fl_str_mv
subject_por_txtF_mv Aeroacústica
Predição de ruído (aeronaves)
Motores Turbofan
Turbinas a gás
Ruído aerodinâmico
Engenharia mecânica
_version_ 1706809256032862208

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