JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
Volume 30 , Issue 4
Showing 1-12 articles out of 12 articles from the selected issue
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 261-262
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (2202K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 263-274
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (12196K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 275-280
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (1666K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 281-286
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (1604K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 287-291
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (6168K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 292-297
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (6894K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 298-305
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (5805K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 306-311
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (864K)
  • [in Japanese]
    1995 Volume 30 Issue 4 Pages 312-318
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    Download PDF (957K)
  • Ryuichi Kimura, Noboru Nakai, Hiroshi Mizutani
    1995 Volume 30 Issue 4 Pages 319-325
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    In order to prevent an accident of an engine. Various systems to watch engine condition is necessary. We reported it with our paper already about a diagnosis system to use a sound. This paper describes the system which abnormal condition of engine is diagnosed by its vibration.
    Abnormal condition of the engine because of vibration was made to occur as being artificial in crankcase of engine. The vibration occurs, when connectingrod-large-end comes in contact with the thin metal board that was attached as taking it inside crankcase. The vibration was detected by means of a vibration sensor on the surface of engine frame. A statistical analysis was done against the spectral data of vibration signal. and a detection of an abnormal condition was enforced.
    It was proved its result. to be able to detect an abnormal condition to make occur inside crankcase, as we used the diagnosis method by means of vibration. However, as a distance with the vibration soruce and the sensor gets long, it gets difficult to detect an abnormal condition.
    It is necessary to advanced a research further about this unsettled probrem at issue.
    Download PDF (1112K)
  • Osami Hishida, Hirotsugu Fujita, Wataru Harano, Hirofumi Yamamoto, Kat ...
    1995 Volume 30 Issue 4 Pages 326-331
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    The measurements of two-dimensional distribution of soot concentration are necessary for better understanding of the conditions of the soot formation and decomposition during the rapid combuston. The YAG laser sheet (50 mm×0.5 mm) of wavelength 532 nm (22mJ/pulse) was used as the light source for Mie's theory. The visualization of soot particles was realized by a ICCD camera via a high-speed gated image intensifier. The scattered light images in the C3H8/Air diffusion flame were measured at various cross sections above the nozzle tip. Spatial distribution (maps) plots for the soot volume fraction were obtained in the flame from the inspectional data by the light attenuation techniques. The soot volume fraction lies within the limits of 10-7 and 10-5 cm3/cm3, and have maxima at the near part of flame front.
    Larger peak values are found in the vicinity of the burner port. Those experimental results agree approximately with the previous data obtained by the light attenuetion technices.
    Download PDF (2039K)
  • Woei-Yuan Wu, Takayuki Sato, Kunihiro Nakashima, Tugue Itoh, Kyouzo Ko ...
    1995 Volume 30 Issue 4 Pages 332-339
    Published: April 01, 1995
    Released: May 31, 2010
    JOURNALS FREE ACCESS
    In recent years, strict restrictions against the emission of NOx have been applied to the landbased source of pollution. Also, the limitations of NOx emission at the marine area have been considered. A combined cycle using gas and steam turbines is considered to be one of the engines of the low NOx emission. The combined cycle offers approximately the same thermal efficiency and the smaller NOx emission compared to the existing marine diesel engines.
    Ultra Small Combined Cycle (USCC) test facility are disigned and constructed in Tokyo University of Mercantile Marine. The total power of USCC is approximately 20 kW and is considered to be the smallest in the world. The purpose of the experiments is classified into two categories. One is to study the characteristics of exhaust gas emission for a gas turbine which is a top cycle of the combined engine. Another is to study the scale effects of the combined engine for the thermal efficiency and the thermal hydraulics comparing with the existing combined cycle power plant whose power is much larger than that of USCC. The major characteristics of USCC are reported and discussed in this paper.
    Download PDF (1208K)
feedback
Top