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Volume 39 (1990)
- Issue 2 Pages 33-
- Issue 1 Pages 1-
Volume 39, Issue 1
Displaying 1-3 of 3 articles from this issue
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Paper
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Kwang Ill KIM, Hideo OHTANI, Yoichi UEHARA1990 Volume 39 Issue 1 Pages 1-7
Published: 1990
Released on J-STAGE: January 25, 2012
JOURNAL FREE ACCESSIn order to investigate the generation of carbon monoxide and the heat loss of incomplete combustion in compartment fires, an experiment was conducted in a small scale compartment by using methanol as a fuel. The concentration of carbon monoxide and the toxicity parameter showed high values when the mass air-to-fuel stoichiometric ratio ∅ is under 1.0. The consitution of the combustion gas was showed to be estimated from the ∅.
The heat loss due to incompleteness of combustion is about one third of heat of combustion in case of ∅ under 1.0.View full abstractDownload PDF (441K) -
Makoto HOSHINO, Koji HAYASHI1990 Volume 39 Issue 1 Pages 9-21
Published: 1990
Released on J-STAGE: January 25, 2012
JOURNAL FREE ACCESSIn a practical fire fighting situation, there is a possibility that different foams will be applied to a tank fire in series or simultaneously by a fire brigade.
This report was to determine the compatibility of two different foams when applied to an acetone or isobutanol fire simultaneously through two nozzles by gentle surface application. This report also considers the effectiveness of a single foam on such fires.
Comparative performance was judged by the extinction time, fuel vapor sealability and burnback resistance of the foams.
A fluorochemical foam (polymeric gel forming type), when it is applied to fires involving polar solvents, greatly reduced the extinction time compared to a polar-solvent type fluoroprotein foam used alone. But the fluoroprotein foam has better resistance in the reignition (burnback) test compared to the fluorochemical foam used alone.
When the fluoroprotein foam is used with the fluorochemical foam, there was a definite decrease in the extinction time compared to when the fluoroprotein foam is used alone.
Foams generated separately from polymeric gel and fluoroprotein are compatible and can be applied together on fires involving polar solvents.View full abstractDownload PDF (668K) -
Chi-Sheng LIN, Keiji TAKENO, Toshisuke HIRANO1990 Volume 39 Issue 1 Pages 23-31
Published: 1990
Released on J-STAGE: January 25, 2012
JOURNAL FREE ACCESSThe characteristics of four types of burner flames (micro-, Meker-, ISO air mix-, and Japan Fire Defense Agency air mix- burner flames: The last two burners are of the same construction except for a stabilizer plate. The former is with the stabilizer plate and the latter is without it, which are currently used for flammability tests of textile fabrics, have been investigated. The dependences of heights of the flames on fuel flow rate, temperature distributions of tipical flames, and distributions of heat fluxes from the flames under test conditions to a solid (aspestos-cement-perlite) plate surface were examined in detail.
It was shown that the flame height of each of micro- and Meker- burner flames is proportional to the fuel flow rate, but that the fuel flow rate to a micro-burner at the standard flame height is about a half as much as that to a Meker-burner. The flame height of either type of the air mix-burners depends on the fuel flow rate and is almost independent of the nozzle hole diameter. The maximum temperatures of micro-, Meker-, and air mix- burner flames are respectivily 1555 °C, 1542 °C, and 1627 °C. These temperatures reduce by several tens °C when a solid plate surface is close to the flames. The measured heat flux distributions along the solid plate surface indicate that the heat flux to a test material depends on the burner type. These results imply the needs of further studies for establishment of an appropriate method for flammability tests of textile fabrics.View full abstractDownload PDF (587K)
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