Abstract
Observation of a cavitation cloud was performed using an off-axis laser holography system. The cavitation cloud contains an inverse U-shaped vortex cavitation surrounded by many small cavitation bubbles. The density of bubbles with radius larger than 35 μm is on the order of 103 bubbles/cm3. The bubble number distribution was determined from the observation and by counting individual bubbles in reconstructed holographic images of the cavitation cloud.
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Hiroharu Kato: He received his B. Eng. degree in naval architecture in 1961, and his PhD in mechanical engineering in 1966 both from the University of Tokyo. He has been a professor at the Department of Environmental and Ocean Engineering, University of Tokyo until March 1999. Presently a professor at the Mechanical Engineering Department, Toyo University. He was the president of the Visualization Society of Japan in 1997-1998. His major research field is cavitation, turbulent drag reduction, heat transfer, and environmental engineering.
Hajime Yamaguchi: He received his PhD degree in naval architecture in 1983 from the University of Tokyo. He works at the Department of Environmental and Ocean Engineering, the University of Tokyo as an associate professor. His research interest is polar environmemtal engineering and cavitation.
Masatsugu Maeda: He is a research associate at the Department of Environmental and Ocean Engineering, the University of Tokyo. He has been working on cavitation tunnel experiment for 30 years.
Y. Kawanami: He received a bachelor and a master degree both in engineering from the University of Tokyo. He works for the Ship Research Institute as a research fellow.
Shogo Nakasumi: He graduated Dept. of Naval Architecture and Ocean Engineering, the University of Tokyo in 1998. Presently a master-course student, Dept. of Environmental and Ocean Engineering, the University of Tokyo.
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Kato, H., Yamaguchi, H., Maeda, M. et al. Laser holographic observation of cavitation cloud on a foil section. J Vis 2, 37–50 (1999). https://doi.org/10.1007/BF03182550
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DOI: https://doi.org/10.1007/BF03182550