Marine Engineering
Online ISSN : 1884-3778
Print ISSN : 1346-1427
ISSN-L : 1346-1427
Volume 37, Issue 5
Displaying 1-8 of 8 articles from this issue
  • [in Japanese], [in Japanese]
    2002Volume 37Issue 5 Pages 345-353
    Published: May 01, 2002
    Released on J-STAGE: December 08, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese], [in Japanese]
    2002Volume 37Issue 5 Pages 354-362
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese], [in Japanese]
    2002Volume 37Issue 5 Pages 363-370
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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  • Swarn S. Kalsi
    2002Volume 37Issue 5 Pages 371-375
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Advances in High Temperature Superconductors (HTS) are enabling a new class of synchronous otating machines, both motors and generators. Compared to conventional machines of equivalent rating, these machines are expected to be less expensive, lighter, more compact, efficient, and provide significantly superior stable operation in a power system. The field windings are made with HTS conductor material (BSCCO, or Bi-2223) which operates at 35-40 K and can be cooled with inexpensive, off-the-shelf cryocoolers available from a number of manufacturers throughout the world. HTS motors and generators are attractive for use in naval and commercial maritime industry applications. This paper discusses recent superconducting work relating to these new machines at American Superconductor Corporation (AMSC) and other companies. HTS rotating machine technology is maturing rapidly, and ship builders as well as theend-users will benefit enormously from these advancements.
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  • [in Japanese]
    2002Volume 37Issue 5 Pages 376-383
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese], [in Japanese]
    2002Volume 37Issue 5 Pages 384-396
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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  • (The third Report: The Combustion Simulation for 2-stroke cycle with Side Injection)
    Y.S. Long, H. Gakumasawa, H. Hiroyasu
    2002Volume 37Issue 5 Pages 397-404
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    In this paper, the combustion simulation considered of two-cycle, side spray for slow speed diesel engines are presented. In the simulative calculation, an attempt is made to transform an existing simulation code to apply it to two-cycle, side spray diesel engine design. The model has, up to now, proved to give reliable pre-dictions of both engine performances and emissions for high-speed diesel engines, but some modifications have been made in order to simulate two-cycle, side spray for slow speed diesel engine. By comparing calculated results with the experimental results, it was revealed that the modified model predicts with very good accuracy engine performance. Of course, more validation is required for the model, especially concerning the prediction of pollutant emission.
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  • Nobutoyo Tsutsumi, Osami Nishida
    2002Volume 37Issue 5 Pages 405-415
    Published: May 01, 2002
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Along with the evolution of electronics, sensors are widely used in vessels and vehicles making operations safe and comfortable. Different from other electronic components, sensors are, however, used in harsh environments and sometimes conventional testing is not sufficient enough to evaluate their reliability.
    This report presents a study where FTA and existing information from design, production and fields are effectively used to find factors affecting the failure quickly, effectively and accurately without redundant experiments and analysis. In addition, newly developed FMFC, and comprehensive recurrence experiment methods are proposed to find correct failure mechanism. Through these processes, we expect to develop accelerated testing with smaller yet accurate experiments.
    Finally, we verified the effects of the aforementioned method by successfully applying it to the thermistor temperature sensors.
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