Application of multi-process cavitation model for cavitating flow in cold water and in liquid nitrogen around a hydrofoil

研究成果: 会議への寄与タイプ学会誌査読

1 被引用数 (Scopus)

抄録

As one of the improvements of the conventional cavitation models, a new cavitation model named "Multi-Process Cavitation Model", which takes various elementary processes in cavitation such as bubble expansion/shrinkage with bubble-bubble interaction, evaporation/condensation, inception/collapse, coalescence and break-up into account, has been recently constructed. In this paper, we validated this cavitation model with a CFD solver around a hydrofoil of NACA0015 in cold water, together with the validation around a hydrofoil of NACA16-012 in liquid nitrogen as one of the cryogenic fluids. As a result, in the case of cold water, the prediction accuracy of the lift coefficient was improved compared with some typical conventional models. It was confirmed that one of the reasons why the present model improves the prediction accuracy of the lift coefficient is we take apparent "inception delay" into account based on the typical size distribution of pre-existing bubble nuclei. On the other hand, in the case of liquid nitrogen, the temperature decrease due to thermodynamic effect was predicted at least qualitatively, but its quantitative accuracy was not ensured. Related to the fair prediction in the case of liquid nitrogen, one of the problems in the application of the present cavitation model would be that the typical size distribution of bubble nuclei in inception has not been understood experimentally and theoretically in the case of cryogenic fluids, and more appropriate modeling of the inception in cryogenic fluids is one of the important near future works.

本文言語英語
DOI
出版ステータス出版済み - 1月 1 2015
イベントASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 - Seoul, 韓国
継続期間: 7月 26 20157月 31 2015

その他

その他ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
国/地域韓国
CitySeoul
Period7/26/157/31/15

!!!All Science Journal Classification (ASJC) codes

  • 流体および伝熱

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