Academic Journal
Study on Sub-cooled Boiling Heat Transfer Model in Inclined Rod Bundle Channel
| العنوان: | Study on Sub-cooled Boiling Heat Transfer Model in Inclined Rod Bundle Channel |
|---|---|
| المصدر: | Yuanzineng kexue jishu, Vol 57, Iss 8, Pp 1544-1552 (2023) |
| بيانات النشر: | Editorial Board of Atomic Energy Science and Technology |
| سنة النشر: | 2023 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | sub-cooled flow boiling, inclined heating rod bundle, bubble dynamics, wall heat flux partitioning, mechanistic model, Nuclear engineering. Atomic power, TK9001-9401, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| الوصف: | Due to the existence of phase transition, sub-cooled boiling, as an efficient heat exchange mode, is widely used in most heat exchange equipment. Under specific application conditions, the rod bundles will work under inclined conditions. For example, some heat exchangers need a certain inclination angle for installation due to space constraints, different positions in the elbow area of the U-tube steam generator have different inclination angles, and some rod bundles in marine nuclear power floating platforms or ship nuclear power plant also experience long-term inclination under ocean conditions with large-period waves. Therefore, it is crucial to research the sub-cooled flow boiling heat transfer characteristics on the surface of inclined heating rod bundles. In this paper, combining with the content of bubble dynamics and according to the characteristics of inclined bubble detachment, the bubble detachment criterion under inclined conditions was formulated. The force calculation of the bubble was then carried out, and the correlation parameters such as the diameter of the bubble detachment were-obtained. In the calculation process, it is considered that the bubbles detachment judgment condition on the upper surface of the inclined heating rod bundles is that the force balance in the direction of bubble buoyancy is broken. Additionally, under inclined heating rod bundles, a calculation model of the heat flux on the heating wall was also established adopting the wall heat flux partitioning model in conjunction with the bubble dynamics. Traditional wall heat partitioning models are mostly based on vertical or horizontal heating walls, however, the applicability for inclined conditions is still being investigated. In comparison to traditional heating conditions, the bubble behavior on the heating surfaces of the inclined heating rod bundles is different, resulting in a different heating transfer process. Therefore, the traditional wall heat partitioning model was improved to adapt to the working conditions of ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English Chinese |
| تدمد: | 1000-6931 |
| Relation: | https://www.aest.org.cn/CN/10.7538/yzk.2022.youxian.0864; https://doaj.org/toc/1000-6931; https://doaj.org/article/d80a269dd7b04df7ab0d5ec739ca3b5d |
| الاتاحة: | https://doaj.org/article/d80a269dd7b04df7ab0d5ec739ca3b5d |
| رقم الانضمام: | edsbas.503E9842 |
| قاعدة البيانات: | BASE |
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