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

Research output: Contribution to conferencePaper

Abstract

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.

Original languageEnglish
DOIs
Publication statusPublished - Jan 1 2015
EventASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 - Seoul, Korea, Republic of
Duration: Jul 26 2015Jul 31 2015

Other

OtherASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
CountryKorea, Republic of
CitySeoul
Period7/26/157/31/15

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Hydrofoils
Unsteady flow
Gases
Drag
Cavitation
Drag coefficient
High speed cameras
Video cameras
Strain gages
Wind tunnels

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Cite this

Daido, H., Watanabe, S., & Tsuda, S. (2015). Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil. Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of. https://doi.org/10.1115/AJKFluids2015-05488

Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil. / Daido, Haruki; Watanabe, Satoshi; Tsuda, Shinichi.

2015. Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of.

Research output: Contribution to conferencePaper

Daido, H, Watanabe, S & Tsuda, S 2015, 'Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil' Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of, 7/26/15 - 7/31/15, . https://doi.org/10.1115/AJKFluids2015-05488
Daido H, Watanabe S, Tsuda S. Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil. 2015. Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of. https://doi.org/10.1115/AJKFluids2015-05488
Daido, Haruki ; Watanabe, Satoshi ; Tsuda, Shinichi. / Effects of dissolved gas on unsteady cavitating flow around a clark y-11.7% hydrofoil. Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of.
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