Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s13369-023-07662-7 http://hdl.handle.net/11449/246835 |
Resumo: | In this research, three W-shaped ribs are taken to analyze their influence on the heat transfer rate in the internal cooling of a gas turbine blade at constant e/Dh (0.037) and heat flux. The ribs are located on rectangular channels in a square duct, and the experiments are conducted for low Reynolds numbers (12,000–20,000). The influence of Reynolds number, pitch ratios (4.28, 5.71, and 7.14), rib shape, and rib angle (45°, 50°, and 55°) on the area-averaged heat transfer, friction factor, and thermal performance is analyzed. The experimental values of the Nusselt number and friction factor obtained from the smooth channel fit well with Dittus–Boelter and Blasius correlations. The Nusselt number increases with an increase in pitch ratio. The friction factor decreases by 3.5, 5.3, and 7.1 times for the W rib turbulator as the rib angle increases compared with the smooth channel. The present work reveals higher thermal performance than other studies based on ribs dimension, shape, pressure drop, frictional losses, and Reynolds number (12,000–20,000). Accordingly, using these geometric parameters, a new correlation of Nusselt number and friction factor is developed and compared with the experimental results. The Nusselt number and friction factor deviation were ± 6% and ± 11%, respectively. |
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Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square DuctArea-averaged heat transfer enhancementFriction factorPitch ratioReynolds numberRib angleW-shaped rib turbulatorIn this research, three W-shaped ribs are taken to analyze their influence on the heat transfer rate in the internal cooling of a gas turbine blade at constant e/Dh (0.037) and heat flux. The ribs are located on rectangular channels in a square duct, and the experiments are conducted for low Reynolds numbers (12,000–20,000). The influence of Reynolds number, pitch ratios (4.28, 5.71, and 7.14), rib shape, and rib angle (45°, 50°, and 55°) on the area-averaged heat transfer, friction factor, and thermal performance is analyzed. The experimental values of the Nusselt number and friction factor obtained from the smooth channel fit well with Dittus–Boelter and Blasius correlations. The Nusselt number increases with an increase in pitch ratio. The friction factor decreases by 3.5, 5.3, and 7.1 times for the W rib turbulator as the rib angle increases compared with the smooth channel. The present work reveals higher thermal performance than other studies based on ribs dimension, shape, pressure drop, frictional losses, and Reynolds number (12,000–20,000). Accordingly, using these geometric parameters, a new correlation of Nusselt number and friction factor is developed and compared with the experimental results. The Nusselt number and friction factor deviation were ± 6% and ± 11%, respectively.Mechanical Engineering Department G H Raisoni College of Engineering and Management, MaharashtraMechanical Engineering Department AGTI’s Dr. Daulatrao Aher College of Engineering Karad, MaharashtraMechanical Engineering National Institute of Technology Agartala, TripuraUNESP - São Paulo State University, Campus of Ilha Solteira, Av. Brasil 56, SPUNESP - São Paulo State University, Campus of São João da Boa VistaInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER) Kyushu UniversityMechanical Engineering Department Kyushu University, 744 MotookaUNESP - São Paulo State University, Campus of Ilha Solteira, Av. Brasil 56, SPUNESP - São Paulo State University, Campus of São João da Boa VistaG H Raisoni College of Engineering and ManagementAGTI’s Dr. Daulatrao Aher College of Engineering KaradNational Institute of Technology AgartalaUniversidade Estadual Paulista (UNESP)Kyushu UniversityGajghate, Sameer SheshraoDeshpande, Onkar PrakashDesai, Amit UttamDeshmukh, Akshay DilipKharade, Shrikant UttamPal, SagnikCardoso, Elaine Maria [UNESP]Saha, Bidyut BaranBhaumik, Swapan [UNESP]2023-07-29T12:51:49Z2023-07-29T12:51:49Z2023-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s13369-023-07662-7Arabian Journal for Science and Engineering.2191-42812193-567Xhttp://hdl.handle.net/11449/24683510.1007/s13369-023-07662-72-s2.0-85148096895Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengArabian Journal for Science and Engineeringinfo:eu-repo/semantics/openAccess2023-07-29T12:51:49Zoai:repositorio.unesp.br:11449/246835Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-07-29T12:51:49Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
title |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
spellingShingle |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct Gajghate, Sameer Sheshrao Area-averaged heat transfer enhancement Friction factor Pitch ratio Reynolds number Rib angle W-shaped rib turbulator |
title_short |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
title_full |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
title_fullStr |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
title_full_unstemmed |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
title_sort |
Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct |
author |
Gajghate, Sameer Sheshrao |
author_facet |
Gajghate, Sameer Sheshrao Deshpande, Onkar Prakash Desai, Amit Uttam Deshmukh, Akshay Dilip Kharade, Shrikant Uttam Pal, Sagnik Cardoso, Elaine Maria [UNESP] Saha, Bidyut Baran Bhaumik, Swapan [UNESP] |
author_role |
author |
author2 |
Deshpande, Onkar Prakash Desai, Amit Uttam Deshmukh, Akshay Dilip Kharade, Shrikant Uttam Pal, Sagnik Cardoso, Elaine Maria [UNESP] Saha, Bidyut Baran Bhaumik, Swapan [UNESP] |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
G H Raisoni College of Engineering and Management AGTI’s Dr. Daulatrao Aher College of Engineering Karad National Institute of Technology Agartala Universidade Estadual Paulista (UNESP) Kyushu University |
dc.contributor.author.fl_str_mv |
Gajghate, Sameer Sheshrao Deshpande, Onkar Prakash Desai, Amit Uttam Deshmukh, Akshay Dilip Kharade, Shrikant Uttam Pal, Sagnik Cardoso, Elaine Maria [UNESP] Saha, Bidyut Baran Bhaumik, Swapan [UNESP] |
dc.subject.por.fl_str_mv |
Area-averaged heat transfer enhancement Friction factor Pitch ratio Reynolds number Rib angle W-shaped rib turbulator |
topic |
Area-averaged heat transfer enhancement Friction factor Pitch ratio Reynolds number Rib angle W-shaped rib turbulator |
description |
In this research, three W-shaped ribs are taken to analyze their influence on the heat transfer rate in the internal cooling of a gas turbine blade at constant e/Dh (0.037) and heat flux. The ribs are located on rectangular channels in a square duct, and the experiments are conducted for low Reynolds numbers (12,000–20,000). The influence of Reynolds number, pitch ratios (4.28, 5.71, and 7.14), rib shape, and rib angle (45°, 50°, and 55°) on the area-averaged heat transfer, friction factor, and thermal performance is analyzed. The experimental values of the Nusselt number and friction factor obtained from the smooth channel fit well with Dittus–Boelter and Blasius correlations. The Nusselt number increases with an increase in pitch ratio. The friction factor decreases by 3.5, 5.3, and 7.1 times for the W rib turbulator as the rib angle increases compared with the smooth channel. The present work reveals higher thermal performance than other studies based on ribs dimension, shape, pressure drop, frictional losses, and Reynolds number (12,000–20,000). Accordingly, using these geometric parameters, a new correlation of Nusselt number and friction factor is developed and compared with the experimental results. The Nusselt number and friction factor deviation were ± 6% and ± 11%, respectively. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T12:51:49Z 2023-07-29T12:51:49Z 2023-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s13369-023-07662-7 Arabian Journal for Science and Engineering. 2191-4281 2193-567X http://hdl.handle.net/11449/246835 10.1007/s13369-023-07662-7 2-s2.0-85148096895 |
url |
http://dx.doi.org/10.1007/s13369-023-07662-7 http://hdl.handle.net/11449/246835 |
identifier_str_mv |
Arabian Journal for Science and Engineering. 2191-4281 2193-567X 10.1007/s13369-023-07662-7 2-s2.0-85148096895 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Arabian Journal for Science and Engineering |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1792961543555514368 |