JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
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Volume 17, Issue 7
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1982 Volume 17 Issue 7 Pages 470-477
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.470
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1982 Volume 17 Issue 7 Pages 478-509
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.478
    JOURNAL FREE ACCESS
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  • Untersuchung über die Effektive Viskosität des Wirköles im Viskose-Drehschwingungsdämpfer bei Dieselmotor
    (Erster Bericht: Auswirkungen des imaginären Terms der Komplexen Viskosität)
    Shoichi Iwamoto, Reiner Hartmann
    1982 Volume 17 Issue 7 Pages 520-526
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.520
    JOURNAL FREE ACCESS
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    Über den Viskose-Drehschwingungsdämpfer and das dynamische Verhalten seines Dämpfungsmediums- Silikonöl wurde bereits berichtet. Neu ist die Erkenntnis, daß sick der imaginäre Term der komplex Viskosität des Wirköles im Drehschwingungsdämpfer als elastische Kopplung zwischen Dämpfergehäuse and Schwungring deutlich bemerkbar macht. Im bisherigen veröffentlichen Bericht wurde die Behauptung aufgestellt, daß dieser elastische Effekt vernachlässigbar sei.
    In diesem Bericht wurde der imaginäre Term in Abhängigkeit des realen Terms der komplexen Viskosität, sowie der Einfluß des imaginaren Term auf die Wirksamkeit eines Viskose-Drehschwingungsdämpfers näher betrachtet.
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  • Separation Performance of Wire-mesh Demister
    (Effects of the Number of Layers)
    Hideaki Sugita, Seikan Ishigai, Shigeyasu Nakanishi
    1982 Volume 17 Issue 7 Pages 527-533
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.527
    JOURNAL FREE ACCESS
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    Effects of the number of layers on the separation performance of wire-mesh demisters have been studied in a horizontal flow of air laden with water droplets.
    Two kinds of the demisters used are constructed by galvanized iron wires 300 μm and 850 μm in diameter respectively, which are held perpendicular to the air flow direction. Experiments have been made varing from 1 to 4 layers for each demister and varing from 1.0 to 6.0 m/s in mean air velocity, respectively. And the water droplets have been obtained in various sizes from 5 to about 150μm.
    Characteristics of size distribution of water droplets at the outlet to the demisters have little effect on the number of layers in this range, but are influenced by the kind of demister. The previously published theories of water droplets trapping efficiency of the demister give considerably lower values than those obtained by the present experiments, but the difference between the both decreases as the number of layers increases. Pressure loss coefficients when the air is laden with water droplets are 2.1 to 2.5 times greater than those when it is dry independent of the number of layers.
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  • Single Droplet Combustion of Marine Fuel Oil and Its Blendings with Marine Diesel Oil
    Katsuyuki Ito, Michikata Kono, Kazuo Iinuma
    1982 Volume 17 Issue 7 Pages 534-538
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.534
    JOURNAL FREE ACCESS
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    As regards the combustion of a single droplet of heavy fuel oil, it is well known that carbonized products, referred as cenosphere, appears in the latter half of the droplet lifetime and thus the square of the droplet diameter changes in a very complicated manner with time elapsing. In the present work, on the basis of mass change of burning droplets, the combustion characteristics of the droplets of marine fuel oil (C heavy) and its diesel oil (A heavy) blendings were investigated. It is based on the method that the flame of a droplet fired with ignition device was extinguished by injection of low temperature nitrogen in the various injection timing and the mass of fire extinguished droplet was measured at every trial. The results are summarized as follows: (1) The mass of droplets decreases linearly with time. (2) The slope, denoted by the combustion rate, decreases not linearly with increasing mixing ratio of marine fuel oil. (3) Only a small amount of marine fuel oil mixed decreases the combustion rate appreciably.
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  • [title in Japanese]
    1982 Volume 17 Issue 7 Pages 539
    Published: July 01, 1982
    Released on J-STAGE: May 31, 2010
    DOIhttps://doi.org/10.5988/jime1966.17.539
    JOURNAL FREE ACCESS
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