JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
Volume 7 , Issue 6
Showing 1-5 articles out of 5 articles from the selected issue
  • [in Japanese], [in Japanese], [in Japanese]
    1972 Volume 7 Issue 6 Pages 401-406
    Published: June 01, 1972
    Released: May 31, 2010
    JOURNALS FREE ACCESS
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  • [in Japanese], [in Japanese], [in Japanese]
    1972 Volume 7 Issue 6 Pages 407-421
    Published: June 01, 1972
    Released: May 31, 2010
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1972 Volume 7 Issue 6 Pages 422-432
    Published: June 01, 1972
    Released: May 31, 2010
    JOURNALS FREE ACCESS
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  • 1972 Volume 7 Issue 6 Pages 433-470
    Published: June 01, 1972
    Released: May 31, 2010
    JOURNALS FREE ACCESS
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  • Masahiro Ikenouchi, Yasuhisa Endo
    1972 Volume 7 Issue 6 Pages 485-495
    Published: June 01, 1972
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    In some types of diesel engines, pitting damage troubles have been sometimes experienced, which seems to be related with Cavitation due to vibration of cylinder liners being excited by the impactive force from piston motion.
    In this study, the dynamical behaviors of cylinder liner of the marine use trunk type and two-stroke diesel engine whose bore is 350φ have been measured and discussed from the viewpoint of cavitation erosion.
    In our experiments, the cylinder liner deflection caused by impactive force from piston showed the value more than 0.1 mm at each cycle, and this deflection was followed by excited vibration of cylinder which caused the pressure fluctuation of cooling water in jacket enough to initiate cavitation.
    Cavity motion was observed directly at the same time to make our estimation more sure. On the other hand, the studies on each factor considered to have dominant influence on cavitation erosion have been carried out in simple model scale but in detail.
    Magnetstrictive vibratory test showed us that if the vibration amplitude is kept within 0.04 mm, cylinder liners will be successfully prevented from cavitation erosion.
    Addition of soluble oil to cooling water was found to have remarkable effect on the reduction of caviration erosion, the reason of which was in the variation of surface tension of water by the addition of soluble oil.
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