effects of wall superheat and mass flux on flow film boiling in cryogenic chilldown process
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ID: 140657
2020
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Abstract
Chilldown process is usually the initial operation for storing and transporting cryogenic fluids. During this process, film boiling is of great importance in terms of the large time span. In this research, a numerical model was built to study the flow regime and heat transfer characteristics of the film boiling with cryogenic fluids. An algebraic interface area density framework was coupled in the model to calculate the drag force at the liquid-gas interface. Accordingly, the effects of wall superheat and mass flow rate on heat flux and film thickness were investigated. Furthermore, the variance analysis method was employed to evaluate the weight of the effects of superheat and inlet mass flow and their coupling effect on the heat transfer coefficient. The results reveal that the wall superheat effect prevails over the mass flux effect on the heat transfer coefficient. Moreover, the two factors have a relatively weak coupling impact on the heat transfer coefficient. Finally, the features of pressure drop in the tube were further analyzed.
| Reference Key |
chen2020aipeffects
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|---|---|
| Authors | ;Jianye Chen;Ruirui Zeng;Hong Chen;Junlong Xie |
| Journal | journal of hydrology: x |
| Year | 2020 |
| DOI |
10.1063/1.5135643
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| URL | |
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