Journal of the Fuel Society of Japan
Online ISSN : 2185-226X
Print ISSN : 0369-3775
ISSN-L : 0369-3775
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Volume 50, Issue 10
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1971 Volume 50 Issue 10 Pages 755
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_755
    JOURNAL FREE ACCESS
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  • Air Pollution in the Industrial Cities
    Yasuji Himi
    1971 Volume 50 Issue 10 Pages 756-767
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_756
    JOURNAL FREE ACCESS
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    The air pollution in the industrial cities is the noticeable problem in recent years.
    In this review, the definition, the main sources, the kinds of pollutants, the out of history the classifications, and the changes and distributions of pollutants about this problem are described.
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  • Unleaded Gasoline Problems
    Sanichiro Uchida
    1971 Volume 50 Issue 10 Pages 768-777
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_768
    JOURNAL FREE ACCESS
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    In Japan all the lead additives in both premium and regular gasolines are to be removed from April 1, 1974. This project not only has a great influence on our refineries technically and economically, but also poses many problems on manufacturing and using thereof. As far as the former is concerned, it includes such problems as how to manufacture the well balanced unleaded gasoline, in connection with this, the restriction of gasoline composition, how to select the suitable octanebooster, and manufacturing cost up.The latter includes valve sheet recession and knocking troubles of the older cars without new devices. Here, the author briefly discusses these problems .
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  • On Combustion Noise in Industrial Combustors
    Shoichi Tsuji
    1971 Volume 50 Issue 10 Pages 778-784
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_778
    JOURNAL FREE ACCESS
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    Recently combustion noise problems in industrial combustors have been called into one of important problems together with air pollution problems.
    Combustion noises are divided into the turbulent combustion noise and the oscillation combustion noise. In industrial combustrors such as boilers or heating furnaces, oscillation combustion noises are very more intensive than turblent combustion noises. Then this paper deals with the reasons of occurrence and the methods of prevention of oscillation combustion noises.
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  • Combustion Driven Oscillation
    Tadao Takeno
    1971 Volume 50 Issue 10 Pages 785-790
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_785
    JOURNAL FREE ACCESS
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    The combustion in propulsion engines or industrial furnaces is never perfectly smooth and is usually accompanied with random fluctuations in the combustion rate as well as in pressure and velocity. When the pressure fluctuation becomes in phase with the fluctuation in the heat release rate of combustion, the fluctuation will develop into the organized combustion driven oscillation with well-defined frequency. The combustion driven oscillation can be classified into two categories: Helmholz resonator type and acoustic type. The Helmholtz resonator type oscillation is characterized by the relatively low frequency of the oscillation and the amplitue of oscillation is uniform through the combustion chamber at any instant during the oscillation. The occurrence of the oscillation is closely related to the coupling between the variation in the chamber prassure and in the feeding rate of fuel to the chamber. The acoustic type oscillation has the higher frequency and is characterized by the presence of the sound wave propagating in the chamber. The location of the combustion zone is very important for the occurrence of the oscillation. The fundamental characters and the driving mechanisms for each type of oscillation are discussed.
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  • Experiments on the Thermal Degradation of Ethylene Low polymer
    Yoji Kitaoka, Katsuhide Murata
    1971 Volume 50 Issue 10 Pages 791-799
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_791
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    A series of experiments has been carried out on the thermal degradation of ethylene low polymer using a continuous flow stirred tank reactor, and the temperature for the thermal degradation, the degradation rate, the composition of products and the carbon formation on the heated surface have been studied . For example the degradation rate of 7.0g/cm3hr at 440°C, and the activation energy of 48 .6kcal/mol for the low polymer were found. The degradation product was separated into two parts, one volatile gas and the other non-volatile oily product, in the ratio of about 1: 24. The volatile gas was composed of CH4, C2H4, C2H6, C3H6, C3H8, C4H8 and C4H10. The non-volatile was composed of C5-C30 hydrocarbons, which contained n-paraffins, 1-olefins and isomers, in the ratio of about 6: 3: 1. It was found that the heated surface was prevented from carbon deposition by powerfull agitation and that the reactor was prevented from carbon accumulation by discharging a part of content intermittently . Thus the reactor has been kept clean and continuous long runs have been made.
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  • [title in Japanese]
    1971 Volume 50 Issue 10 Pages 807-815
    Published: October 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.10_807
    JOURNAL FREE ACCESS
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