Model of the onset of liquid entrainment in large branch T-junction with the consideration of surface tension
| Autor: | Jinchen Gao, Geyu Shen, Ping Liu, Xiaoyu Li, Zhaoming Meng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Entrainment (hydrodynamics)
Surface (mathematics) Physics Surface tension 020209 energy T-junction 02 engineering and technology Mechanics lcsh:TK9001-9401 Silicone oil 030218 nuclear medicine & medical imaging 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Nuclear Energy and Engineering chemistry Liquid entrainment 0202 electrical engineering electronic engineering information engineering lcsh:Nuclear engineering. Atomic power Weber number Working fluid T junction Dimensionless quantity |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 3, Pp 804-811 (2021) |
| ISSN: | 1738-5733 |
| DOI: | 10.1016/j.net.2020.09.002 |
| Popis: | The T-junction exists widely in industrial engineering, especially in nuclear power plants, which plays an important part in nuclear power reactor thermal-hydraulics. However, the existing prediction models of the liquid entrainment are mainly based on the small branches or small breaks while there are a few researches for large branches (d/D > 0.2). Referring to the classical models about the onset of liquid entrainment of the T-junction, most of previous models regard liquid as ideal working fluid and ignore surface tension. This paper aims to study the effect of surface tension on the liquid entrainment, and develops an improved model based on the reasonable assumption. The establishment of new model employs the methods of force analysis, dimensional analysis. Besides, the dimensionless Weber number is adopted innovatively into the model to show the effect of surface tension. What is more, in order to validate the new model, three kinds of working fluids with different surface tensions are creatively adopted in the experiments: water, silicone oil and ethyl alcohol. The final results show that surface tension has a nonnegligible effect on the onset of liquid entrainment in large branch T-junction. The new model is well matched with the experimental data. |
| Databáze: | OpenAIRE |
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