Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil

研究成果: 会議への寄与タイプ学会誌査読

2 被引用数 (Scopus)

抄録

In the present study, the effects of dissolved gas content on the unsteady cavitating flow around a Clark Y-11.7% hydrofoil are investigated in a cavitation tunnel. Lift and drag forces in various cavitating conditions are directly measured by strain gauges attached on the cantilever supporting the hydrofoil. In addition, the cavitating flow is filmed from the top and the side simultaneously using two high speed video cameras. The high (roughly 6-8ppm) and low (1-2ppm) DO conditions are examined to obtain the qualitative tendencies of the effects of dissolved gas on unsteady cavitation behavior and lift/drag characteristics. It is found that that the relationship between the cavitation behavior and the lift/drag fluctuations does not qualitatively differ in the two different DO conditions, while the amplitude is slightly larger in the low DO condition. At transitional cavity oscillation, in the both DO conditions, the lift/drag coefficients increase during the growth stage of sheet/bubble cavities on the hydrofoil and they decrease when the developed super-cavity disappears. Moreover, it seems that the amplitude of the lift/drag forces in the low DO condition is larger than in the high DO condition but the frequency of lift force fluctuation is not very different.

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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