Non-uniform Flow Field of Convection Heat Transfer Characteristics of Supercritical Methane in a Horizontal Tube
In order to reveal the heat transfer mechanism of supercritical methane heat exchanger，a coupled model for solid wall heat conduction and convection supercritical methane is established，and the non-uniform flow field of convection heat transfer characteristics of supercritical methane are analysed...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2021-06-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1973 |
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| Summary: | In order to reveal the heat transfer mechanism of supercritical methane heat exchanger，a coupled
model for solid wall heat conduction and convection supercritical methane is established，and the non-uniform flow
field of convection heat transfer characteristics of supercritical methane are analysed． The results indicate that
during the heating process， the Ｒeynold number monotonously increases with the augment of bulk fluid
temperature，and the Prandtl number has both the trough and peak values． Under the action of double effects of
buoyancy and gravity， the thermal properties of methane on the tube cross section show the non-uniform
“distortion”and“stratification”characteristics，accompanied by the complex“secondary flows”phenomenon． The
non-uniform distributions of inner wall temperature and heat flux of circular tube are observed，and the minimum
value is reached at 0° of tube． The peak of heat transfer coefficient appears near the critical temperature． Compared
with the operating pressures，the heat transfer characteristics of supercritical methane are more sensitive to the mass
fluxes． |
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| ISSN: | 1007-2683 |