JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
Volume 26 , Issue 9
Showing 1-19 articles out of 19 articles from the selected issue
  • 1991 Volume 26 Issue 9 Pages 423-435
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 436-443
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 444-447
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 448-451
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 452-457
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese], [in Japanese]
    1991 Volume 26 Issue 9 Pages 458-464
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 465-471
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese], [in Japanese]
    1991 Volume 26 Issue 9 Pages 472-479
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 480-484
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 485-495
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 496
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 497-502
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 502-510
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese]
    1991 Volume 26 Issue 9 Pages 510-515
    Published: September 01, 1991
    Released: May 31, 2010
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  • [in Japanese], [in Japanese]
    1991 Volume 26 Issue 9 Pages 516-522
    Published: September 01, 1991
    Released: May 31, 2010
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  • Hisashi Yamashita, Yoichi Nakamura, Yoichi Jinja
    1991 Volume 26 Issue 9 Pages 523-531
    Published: September 01, 1991
    Released: May 31, 2010
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    Works with invaluable much experience obtained in the field of automotive engines, there are still many technological hardships to burn methanol on marine diesel engines because of the differences between marine-and automotive diesel engines, especially in dimension and main particulars.
    So injection-and combustion characteristics of dual fuel are examined with a high pressurized chamber and an inertial rapid compression machine.
    As a result, the following fundamentals are obtained:
    (1) Coefficient of flow rate for methanol is equal that for gas oil.
    (2) Equation for penetration of gas oil spray can be applied to methanol spray.
    (3) Methanol flame is blue, which suggests that lesser soot will be generated than gas oil.
    (4) Combustion characteristics of methanol is influenced considerably by quantity, injection direction and injection timing of pilot fuel.
    (5) Combustion characteristics of methanol can be made comparable to that of gas oil by adjusting the parameters above mentioned in (4) .
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  • Yoichi Nakamura, Tadahiro Ozu, Hisashi Yamashita, Nobuyoshi Nakayama, ...
    1991 Volume 26 Issue 9 Pages 532-542
    Published: September 01, 1991
    Released: May 31, 2010
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    Nowadays concerns about methanol has increased from the viewpoints of environmental protection and versatility of fuels at a global scale. Desire for saving of maintenance cost and lobour prevails as well as the environmental problems in the field of marine engines. From these motives we have carried out research and development of a methanol fueled marine diesel engine which is quite different from automobile engines in the size, main particulars, working condition and durability. Although we have made a great use of invaluable knowledge from automotive technology, some special studies were neccessary due to these differences. Ignition method is a typical one. Dual fuel injection system was tried for trouble-free ignition of methanol fuel. This system is thought to be the most favourable ignition method for marine diesel engines which have to withstand quick load change and accept no mis-firing. Under the leadership of Minestry of Transportation and with the aid from The Japan Shipbuilding Industries Fondation and The Japan Marine Machinery Development Association the work has proceeded from elementary studies of injection and tribology to the running test. In this article the effects of configurations as to fuel injection system on the engine performance are described. Fundamental running test with a single cylindered 4-stroke test engine reveals that the marine deisel engine can afford to have such a good performance as an original diesel engine has, when suitable reconditioning of fuel injection-and governing systems being applied to.
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  • Osami Nishida, Hirotsugu Fujita, Wataru Harano
    1991 Volume 26 Issue 9 Pages 543-549
    Published: September 01, 1991
    Released: May 31, 2010
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    Exhausted soot has been one of the important subjects in relation to air pollution. In the former report, we described the effects of the air temperature, air velocity and swirl ratio on exhausted soot density caused by a single shot injection as a basic research.
    The purpose of this study is to investigate the effects of air temperature and swirling flow on the soot caused by intermittent fuel spray combustion under the atomospheric pressure.
    The soot formation is suppressed by applying a swirling flow at a high temperature. However, on applying more fuel injection together with the swirling flow, the soot formation increases because of interfering effect of the burned gaseous groups.
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  • Kazumi Nishikawa, Yasuo Miyagi, Keijiro Shiode
    1991 Volume 26 Issue 9 Pages 550-554
    Published: September 01, 1991
    Released: May 31, 2010
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    The engine performance and emission characteristics of a high speed diesel engine operated on water emulsified fuel were experimentally investigated. The experiments were carried out by using two types of diesel engines: a disesl engine with non-insulated combustion chamber and an experimental engine with insulated combustion chamber (with ceramic wall) . Water emulsified fuels containing water of up to 5 0 vol.% were evaluated by the two types of diesel engines.
    Higher temperature of working gas and higher surface temperature of combustion chamber walls were obtained by the insulated chamber engine.
    This paper describes the results and some findings obtained through the experiments burning water emulsified fuels with a conventional diesel engine and an adiabatic diesel engine.
    The experiment proves that:
    Combustion at higher operating temperature in an adiabatic engine results in significant changes in combustion and emission characteristics, compared that of a conventional diesel engine. NOx and smoke emission are greatly and simultaneously reduced without increasing specific fuel consumption rate by the use of water emulsified fuel and an insulated combustion chamber.
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