| Autor: |
Behruzr, Philipp, Gaulke, Diana, Haake, Dennis, Brossef, Laurent |
| Zdroj: |
Proceedings of the International Offshore & Polar Engineering Conference; 2016, p851-864, 14p |
| Abstrakt: |
Today sloshing in prismatic-shaped LNCi tanks on floating structures is of particular interest for new applications for which there is no feedback from the sea like for offshore projects or for LNG fueled ships and small scale applications. Two points arc relevant 1. Sloshing increases the boil-off rate of the cryogenic liquid. Clearly it is of interest to reduce the boil-off as far as possible. 2. Large sloshing waves may impact the side walls or the ceiling of the prismatic tanks. Large pressure peaks may locally occur which may damage the containment system This paper focuses on the latter aspect, i.e. the wave impacts on the side walls of the tanks for low or intermediate fill levels. The physics involved prior to such impacts is complex and has been detailed in (Brossel, 2016). It includes the development of free surface instabilities due to the shearing gas flow, the gas compression just before and after entrapment and emission of pressure waves into the liquid at the impact points. Furthermore, as LNG is in a state close to saturation, phase change phenomena might play an important role during the impact process, e.g. during the phase of gas compression driving condensation. This clearly poses a challenge to the software codes. The paper focuses on some of these aspects, especially the gas compressibility and phase change influence. In conclusion possibilities concerning non-isothermal experiments with liquid Methane or LNG arc investigated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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