Variable geometry gas turbine performance analysis.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2003 |
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=2703 |
Resumo: | Gas turbines are optimised at design point. When they operate at off-design, the performance is poor because the blade passages are not adequate for the new flow conditions. In order to improve part-load performance, it is necessary to re-shape the blade passages. This can be done with blade re-staggering. Engines with this capability are called variable geometry engines.This work aims at the development of appropriate methodologies to numerically investigate the influence of the main engine components (compressor, turbine and propelling nozzle) on engine performance, as a mean to support applications of high performance cycles that demand extreme operating conditions.An investigation of variable geometry compressor and turbine stators was carried out by means of synthesizing their performance maps at many stator blade settings and the use of such information in cycle analysis. To support the huge amount of calculations required for off-design analysis, a computer program has been developed.Validation of the methodology was performed using data available in the open literature. A powerful tool for the gas turbine simulation that had proved to produce quality results is made available to support research on new concepts for high performance cycles. |
id |
ITA_7d82d2baa99b41c8c99334406a165729 |
---|---|
oai_identifier_str |
oai:agregador.ibict.br.BDTD_ITA:oai:ita.br:2703 |
network_acronym_str |
ITA |
network_name_str |
Biblioteca Digital de Teses e Dissertações do ITA |
spelling |
Variable geometry gas turbine performance analysis.Turbinas a gásEstruturas de geometria variávelCompressoresTurbinasDesempenhoAnálise numéricaProgramas de computadoresMotoresEngenharia mecânicaGas turbines are optimised at design point. When they operate at off-design, the performance is poor because the blade passages are not adequate for the new flow conditions. In order to improve part-load performance, it is necessary to re-shape the blade passages. This can be done with blade re-staggering. Engines with this capability are called variable geometry engines.This work aims at the development of appropriate methodologies to numerically investigate the influence of the main engine components (compressor, turbine and propelling nozzle) on engine performance, as a mean to support applications of high performance cycles that demand extreme operating conditions.An investigation of variable geometry compressor and turbine stators was carried out by means of synthesizing their performance maps at many stator blade settings and the use of such information in cycle analysis. To support the huge amount of calculations required for off-design analysis, a computer program has been developed.Validation of the methodology was performed using data available in the open literature. A powerful tool for the gas turbine simulation that had proved to produce quality results is made available to support research on new concepts for high performance cycles. Instituto Tecnológico de AeronáuticaJoão Roberto BarbosaCleverson Bringhenti2003-00-00info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesishttp://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2703reponame:Biblioteca Digital de Teses e Dissertações do ITAinstname:Instituto Tecnológico de Aeronáuticainstacron:ITAenginfo:eu-repo/semantics/openAccessapplication/pdf2019-02-02T14:04:56Zoai:agregador.ibict.br.BDTD_ITA:oai:ita.br:2703http://oai.bdtd.ibict.br/requestopendoar:null2020-05-28 19:39:53.703Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáuticatrue |
dc.title.none.fl_str_mv |
Variable geometry gas turbine performance analysis. |
title |
Variable geometry gas turbine performance analysis. |
spellingShingle |
Variable geometry gas turbine performance analysis. Cleverson Bringhenti Turbinas a gás Estruturas de geometria variável Compressores Turbinas Desempenho Análise numérica Programas de computadores Motores Engenharia mecânica |
title_short |
Variable geometry gas turbine performance analysis. |
title_full |
Variable geometry gas turbine performance analysis. |
title_fullStr |
Variable geometry gas turbine performance analysis. |
title_full_unstemmed |
Variable geometry gas turbine performance analysis. |
title_sort |
Variable geometry gas turbine performance analysis. |
author |
Cleverson Bringhenti |
author_facet |
Cleverson Bringhenti |
author_role |
author |
dc.contributor.none.fl_str_mv |
João Roberto Barbosa |
dc.contributor.author.fl_str_mv |
Cleverson Bringhenti |
dc.subject.por.fl_str_mv |
Turbinas a gás Estruturas de geometria variável Compressores Turbinas Desempenho Análise numérica Programas de computadores Motores Engenharia mecânica |
topic |
Turbinas a gás Estruturas de geometria variável Compressores Turbinas Desempenho Análise numérica Programas de computadores Motores Engenharia mecânica |
dc.description.none.fl_txt_mv |
Gas turbines are optimised at design point. When they operate at off-design, the performance is poor because the blade passages are not adequate for the new flow conditions. In order to improve part-load performance, it is necessary to re-shape the blade passages. This can be done with blade re-staggering. Engines with this capability are called variable geometry engines.This work aims at the development of appropriate methodologies to numerically investigate the influence of the main engine components (compressor, turbine and propelling nozzle) on engine performance, as a mean to support applications of high performance cycles that demand extreme operating conditions.An investigation of variable geometry compressor and turbine stators was carried out by means of synthesizing their performance maps at many stator blade settings and the use of such information in cycle analysis. To support the huge amount of calculations required for off-design analysis, a computer program has been developed.Validation of the methodology was performed using data available in the open literature. A powerful tool for the gas turbine simulation that had proved to produce quality results is made available to support research on new concepts for high performance cycles. |
description |
Gas turbines are optimised at design point. When they operate at off-design, the performance is poor because the blade passages are not adequate for the new flow conditions. In order to improve part-load performance, it is necessary to re-shape the blade passages. This can be done with blade re-staggering. Engines with this capability are called variable geometry engines.This work aims at the development of appropriate methodologies to numerically investigate the influence of the main engine components (compressor, turbine and propelling nozzle) on engine performance, as a mean to support applications of high performance cycles that demand extreme operating conditions.An investigation of variable geometry compressor and turbine stators was carried out by means of synthesizing their performance maps at many stator blade settings and the use of such information in cycle analysis. To support the huge amount of calculations required for off-design analysis, a computer program has been developed.Validation of the methodology was performed using data available in the open literature. A powerful tool for the gas turbine simulation that had proved to produce quality results is made available to support research on new concepts for high performance cycles. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-00-00 |
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=2703 |
url |
http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2703 |
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 |
Turbinas a gás Estruturas de geometria variável Compressores Turbinas Desempenho Análise numérica Programas de computadores Motores Engenharia mecânica |
_version_ |
1706809289668034560 |