Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct
In order to reveal the heat transfer mechanism of supercritical methane (S-CH4) heat exchanger, the non-uniform convection heat transfer characteristics of supercritical methane (S-CH4) in a 180° curved duct are numerically analyzed. On the basis of verifying the reliability of the numerical method,...
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Harbin University of Science and Technology Publications
2022-06-01
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| Series: | Journal of Harbin University of Science and Technology |
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| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=2092 |
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| author | HAN Chang-liang YIN Peng HAN Fang-ming JIA Ji XU Qi-ao XIN Jing-qing YAO An-ka |
| author_facet | HAN Chang-liang YIN Peng HAN Fang-ming JIA Ji XU Qi-ao XIN Jing-qing YAO An-ka |
| author_sort | HAN Chang-liang |
| collection | DOAJ |
| description | In order to reveal the heat transfer mechanism of supercritical methane (S-CH4) heat exchanger, the non-uniform convection heat transfer characteristics of supercritical methane (S-CH4) in a 180° curved duct are numerically analyzed. On the basis of verifying the reliability of the numerical method, the longitudinal and radial distribution of S-CH4 thermo-physical properties field and the distribution characteristics of “Dean vortices” are obtained, and the heat transfer capacity of curved duct and straight tube is compared. The results show that under the combined action of centrifugal force, gravity and continuous curvature of curved duct, the thermal properties of S-CH4 on the longitudinal section of curved duct present an obvious boundary line, and thermal-physical properties of S-CH4 on the radial section present the “non-concentric circle” distribution. The core position of “Dean vortices” is close to the inner wall of curved duct. At the same time, “Dean vortices” is helpful to enhance the heat transfer of S-CH4, the maximum value of local heat transfer coefficient locates in the inner wall of the curved duct. Compared with the straight tube, when the mass flux is 300 kg/m2·s and 600 kg/m2·s, the heat transfer coefficient of curved duct increases respectively by 18.8% and 23.5%. It provides a reference for the optimal design and application of S-CH4 heat exchanger. |
| format | Article |
| id | doaj-art-7b0c79d309954be8bc2e5a5b7e505df4 |
| institution | DOAJ |
| issn | 1007-2683 |
| language | zho |
| publishDate | 2022-06-01 |
| publisher | Harbin University of Science and Technology Publications |
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| series | Journal of Harbin University of Science and Technology |
| spelling | doaj-art-7b0c79d309954be8bc2e5a5b7e505df42025-08-20T03:14:32ZzhoHarbin University of Science and Technology PublicationsJournal of Harbin University of Science and Technology1007-26832022-06-012703303610.15938/j.jhust.2022.03.004Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved DuctHAN Chang-liang0YIN Peng1HAN Fang-ming2JIA Ji3XU Qi-ao4XIN Jing-qing5YAO An-ka6School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin,150080, ChinaSchool of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin,150080, ChinaAerospace Haiying (Harbin) Titanium Co., Ltd., Harbin, 150029, ChinaAerospace Haiying (Harbin) Titanium Co., Ltd., Harbin, 150029, ChinaSchool of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin,150080, ChinaSchool of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin,150080, ChinaSchool of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin,150080, ChinaIn order to reveal the heat transfer mechanism of supercritical methane (S-CH4) heat exchanger, the non-uniform convection heat transfer characteristics of supercritical methane (S-CH4) in a 180° curved duct are numerically analyzed. On the basis of verifying the reliability of the numerical method, the longitudinal and radial distribution of S-CH4 thermo-physical properties field and the distribution characteristics of “Dean vortices” are obtained, and the heat transfer capacity of curved duct and straight tube is compared. The results show that under the combined action of centrifugal force, gravity and continuous curvature of curved duct, the thermal properties of S-CH4 on the longitudinal section of curved duct present an obvious boundary line, and thermal-physical properties of S-CH4 on the radial section present the “non-concentric circle” distribution. The core position of “Dean vortices” is close to the inner wall of curved duct. At the same time, “Dean vortices” is helpful to enhance the heat transfer of S-CH4, the maximum value of local heat transfer coefficient locates in the inner wall of the curved duct. Compared with the straight tube, when the mass flux is 300 kg/m2·s and 600 kg/m2·s, the heat transfer coefficient of curved duct increases respectively by 18.8% and 23.5%. It provides a reference for the optimal design and application of S-CH4 heat exchanger.https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=2092supercritical methanenon-uniformityconvection heat transfercurved ductdean vortices |
| spellingShingle | HAN Chang-liang YIN Peng HAN Fang-ming JIA Ji XU Qi-ao XIN Jing-qing YAO An-ka Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct Journal of Harbin University of Science and Technology supercritical methane non-uniformity convection heat transfer curved duct dean vortices |
| title | Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct |
| title_full | Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct |
| title_fullStr | Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct |
| title_full_unstemmed | Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct |
| title_short | Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct |
| title_sort | non uniform convection heat transfer characteristics of supercritical methane in 180° curved duct |
| topic | supercritical methane non-uniformity convection heat transfer curved duct dean vortices |
| url | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=2092 |
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