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Volume 46, Issue 10
Displaying 1-6 of 6 articles from this issue
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[in Japanese]1967 Volume 46 Issue 10 Pages 701
Published: October 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (234K) -
[in Japanese]1967 Volume 46 Issue 10 Pages 702-749
Published: October 20, 1967
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSDownload PDF (6550K) -
Kazuo Iinuma, Satoshi Okajima1967 Volume 46 Issue 10 Pages 750-756
Published: October 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSome properties of a kerosene wick flame such as flame appearance, flame temperature and fuel consumption were measured for different velocities of air flow parallel to the wick, temperatures of the air stream, thicknesses of the wick and heighs of the wick exposed to the stream.
A yellow flame similar to a gaseous diffusion flame is obtained when the stream velocity is lower than 1m/sec. As the velocity increases, the flame becomes shorter and highly luminous at first, and then transition to a blue flame similar to a gaseous premixed flame occurs at the air velocity of 2-3m/sec. This transition is probably due to rapid mixing of fuel vapour and air by increased eddy diflusion. When the air velocity increases further, the flame begins to oscillate and finally it blows off at the velocity higher than 10 m/sec.
For practical use, the allowable air velocity is limited to the range for a highly luminous yellow flame and a blue flame without oscillation, fuel consumption being nearly constant in this range.
The increase of thickness of the wick and air temperature decreases the air velocity at which the flame begins to oscillate. Height of the wick exposed to the stream has the same effect when evaporation of fuel from that portion is increased.
Maximum flame temperatures measured by a small thermocouple are about 1400°C for both highly luminous and stable blue flames.View full abstractDownload PDF (1017K) -
Ichijiro Kato, Hiroshi Taguchi, Yasutoshi Matsui, Hisao Hattori1967 Volume 46 Issue 10 Pages 757-766
Published: October 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIt is one of the most important charactors of the demostic gas burners that fuel gas burns completely by these apparatus, because the unburned products such as CO gas are very dangerous on the human health. So it is neccessary to check weather domestic gas burners product unburned gas or not. But in Japan we have not established the standard sampling method of the combustion products for the domestic gas burners.
Two sampling methods are tested; one a ordinary method with a flue to collect the combustion products, the other a direct sampling methods. Test proves that the direct method is better than a ordinary method, because the concentrated sample gas can be collected more easily and these samples show the components of the combustion products more distinctively.View full abstractDownload PDF (2154K) -
Takeshi Yoshida, Mutsuo Koizumi1967 Volume 46 Issue 10 Pages 767-771
Published: October 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA new type of hot water boiler for domestic use is deviced. The boiler, a vertical cylinder 500 mm in diameter 1300 mm in hight 200 Z in volume, is heated by coal which is fired in a cylindrical pot placed at the center of the bottom of the boilor. Combustion gas goes upwards through smoke tubes and is exchausted to a chimney. About 3 kg of coal is burned in one time and water is heated from about 20°C to 80°C, then the hot water is used until it is almost replaced by the cold water. As the result of experments, it is shown that the thermal efficiency of the boiler is of 67-82% and heating time is about 1 hour.View full abstractDownload PDF (648K) -
1967 Volume 46 Issue 10 Pages 777-782
Published: October 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (765K)
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