Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners
Enhancement of heat transfer by pin-fin channels with turbulence promoters has been investigated with an aim to improve the cooling efficiency of combustor liners in gas turbines. Time-mean local Nusselt number profiles were obtained by naphthalene sublimation technique based on the heat/mass transf...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2009-12-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/4/4/4_4_507/_pdf/-char/en |
| _version_ | 1818283181231570944 |
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| author | Yutaka ODA Kenichiro TAKEISHI Yusuke MOTODA Shinsuke SUGIMOTO Yoshiaki MIYAKE |
| author_facet | Yutaka ODA Kenichiro TAKEISHI Yusuke MOTODA Shinsuke SUGIMOTO Yoshiaki MIYAKE |
| author_sort | Yutaka ODA |
| collection | DOAJ |
| description | Enhancement of heat transfer by pin-fin channels with turbulence promoters has been investigated with an aim to improve the cooling efficiency of combustor liners in gas turbines. Time-mean local Nusselt number profiles were obtained by naphthalene sublimation technique based on the heat/mass transfer analogy for Reynolds numbers ranging from 1000-10000. Two oblique rib-type turbulence promoters were tested and compared with no-rib cases. In addition, steady three-dimensional numerical simulations using a RANS model were performed. Installation of turbulence promoters is found to be effective in increasing the endwall heat transfer rate widely and uniformly. In addition, the ribs enhance heat transfer, especially in developing regions at the first and second pin-fin rows. Local high heat transfer regions were obtained in front of the ribs due to horseshoe vortices and downstream of the pins due to a longitudinal vortex. |
| first_indexed | 2024-12-13T00:32:49Z |
| format | Article |
| id | doaj.art-10421bbbdd60449f9ec7b470902babf6 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-13T00:32:49Z |
| publishDate | 2009-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-10421bbbdd60449f9ec7b470902babf62022-12-22T00:05:16ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662009-12-014450751710.1299/jtst.4.507jtstHeat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor LinersYutaka ODA0Kenichiro TAKEISHI1Yusuke MOTODA2Shinsuke SUGIMOTO3Yoshiaki MIYAKE4Osaka UniversityOsaka UniversityOsaka UniversityOsaka UniversityMitsubishi Heavy Industries, Ltd.Enhancement of heat transfer by pin-fin channels with turbulence promoters has been investigated with an aim to improve the cooling efficiency of combustor liners in gas turbines. Time-mean local Nusselt number profiles were obtained by naphthalene sublimation technique based on the heat/mass transfer analogy for Reynolds numbers ranging from 1000-10000. Two oblique rib-type turbulence promoters were tested and compared with no-rib cases. In addition, steady three-dimensional numerical simulations using a RANS model were performed. Installation of turbulence promoters is found to be effective in increasing the endwall heat transfer rate widely and uniformly. In addition, the ribs enhance heat transfer, especially in developing regions at the first and second pin-fin rows. Local high heat transfer regions were obtained in front of the ribs due to horseshoe vortices and downstream of the pins due to a longitudinal vortex.https://www.jstage.jst.go.jp/article/jtst/4/4/4_4_507/_pdf/-char/enpin-finscombustorjet engineheat and mass transfernaphthalene sublimation method |
| spellingShingle | Yutaka ODA Kenichiro TAKEISHI Yusuke MOTODA Shinsuke SUGIMOTO Yoshiaki MIYAKE Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners Journal of Thermal Science and Technology pin-fins combustor jet engine heat and mass transfer naphthalene sublimation method |
| title | Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners |
| title_full | Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners |
| title_fullStr | Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners |
| title_full_unstemmed | Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners |
| title_short | Heat Transfer Characteristics of Pin-Fin Arrays with Ribs to Cool Combustor Liners |
| title_sort | heat transfer characteristics of pin fin arrays with ribs to cool combustor liners |
| topic | pin-fins combustor jet engine heat and mass transfer naphthalene sublimation method |
| url | https://www.jstage.jst.go.jp/article/jtst/4/4/4_4_507/_pdf/-char/en |
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