Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries
Vapor cooling shield is a key technology for long-term cryogenic propellant storage in space. Cooling channels with a triply periodic minimal surface embedded inside are expected to improve its cooling performance. Herein, a cooling channel with a triangle cross-section embedded gyroid structure, a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2023-04-01
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| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/10/3/10_23-00015/_pdf/-char/en |
| _version_ | 1797803033085607936 |
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| author | Toshiya FUKUZAKI Kiyoshi KINEFUCHI Yutaka UMEMURA Koichi OKITA Hitoshi SAKAI |
| author_facet | Toshiya FUKUZAKI Kiyoshi KINEFUCHI Yutaka UMEMURA Koichi OKITA Hitoshi SAKAI |
| author_sort | Toshiya FUKUZAKI |
| collection | DOAJ |
| description | Vapor cooling shield is a key technology for long-term cryogenic propellant storage in space. Cooling channels with a triply periodic minimal surface embedded inside are expected to improve its cooling performance. Herein, a cooling channel with a triangle cross-section embedded gyroid structure, a type of the triply periodic minimal surface structure, was additively manufactured. The pressure drop and heat transfer performances of the channel were experimentally measured using liquid nitrogen vapor. Furthermore, in addition to the gyroid-embedded channel, three channels with different cross-sections were fabricated for comparison: circular, triangle, and triangle with a step/groove on the bottom. The gyroid-embedded channel exhibited unique characteristics, with a thermal conductance that was approximately 40% higher than that of the channel with a simple triangle cross-section, but an excessive pressure drop of approximately 50 times higher than that of the other cross-sections. This denotes that strong vortex and turbulence and the flow separation cause excess pressure drop in the gyroidembedded channel. The pressure drop characteristic of the gyroid-embedded channel against the Reynolds number completely differed from that of the other channels, and the pressure drop of the gyroid-embedded channel can be estimated assuming analogy with particle packed beds. |
| first_indexed | 2024-03-13T05:15:50Z |
| format | Article |
| id | doaj.art-1d0acbf20c1a407e97a4de1e7636fad6 |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-03-13T05:15:50Z |
| publishDate | 2023-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-1d0acbf20c1a407e97a4de1e7636fad62023-06-15T23:41:22ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452023-04-0110323-0001523-0001510.1299/mej.23-00015mejComparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometriesToshiya FUKUZAKI0Kiyoshi KINEFUCHI1Yutaka UMEMURA2Koichi OKITA3Hitoshi SAKAI4Department of Aerospace Engineering, Nagoya UniversityDepartment of Aerospace Engineering, Nagoya UniversityResearch and Development Directorate, Japan Aerospace Exploration AgencyResearch and Development Directorate, Japan Aerospace Exploration AgencyNTT Data XAM Technologies CorporationVapor cooling shield is a key technology for long-term cryogenic propellant storage in space. Cooling channels with a triply periodic minimal surface embedded inside are expected to improve its cooling performance. Herein, a cooling channel with a triangle cross-section embedded gyroid structure, a type of the triply periodic minimal surface structure, was additively manufactured. The pressure drop and heat transfer performances of the channel were experimentally measured using liquid nitrogen vapor. Furthermore, in addition to the gyroid-embedded channel, three channels with different cross-sections were fabricated for comparison: circular, triangle, and triangle with a step/groove on the bottom. The gyroid-embedded channel exhibited unique characteristics, with a thermal conductance that was approximately 40% higher than that of the channel with a simple triangle cross-section, but an excessive pressure drop of approximately 50 times higher than that of the other cross-sections. This denotes that strong vortex and turbulence and the flow separation cause excess pressure drop in the gyroidembedded channel. The pressure drop characteristic of the gyroid-embedded channel against the Reynolds number completely differed from that of the other channels, and the pressure drop of the gyroid-embedded channel can be estimated assuming analogy with particle packed beds.https://www.jstage.jst.go.jp/article/mej/10/3/10_23-00015/_pdf/-char/enrocketcryogenic propellantconvective heat transferpressure dropadditive manufacturinggyroid |
| spellingShingle | Toshiya FUKUZAKI Kiyoshi KINEFUCHI Yutaka UMEMURA Koichi OKITA Hitoshi SAKAI Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries Mechanical Engineering Journal rocket cryogenic propellant convective heat transfer pressure drop additive manufacturing gyroid |
| title | Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| title_full | Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| title_fullStr | Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| title_full_unstemmed | Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| title_short | Comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| title_sort | comparison of vapor cooling characteristics of a triply periodic minimal surface and other channel geometries |
| topic | rocket cryogenic propellant convective heat transfer pressure drop additive manufacturing gyroid |
| url | https://www.jstage.jst.go.jp/article/mej/10/3/10_23-00015/_pdf/-char/en |
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