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Volume 37 (1987)
- Issue 2 Pages 33-
- Issue 1 Pages 1-
Volume 37, Issue 1
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Paper
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K. NAKAMURA, T. TANAKA, T. YAMANA1987 Volume 37 Issue 1 Pages 1-11
Published: 1987
Released on J-STAGE: March 14, 2012
JOURNAL FREE ACCESSMore than 15 years have already passed since the provisions concerning the equipments for smoke exhaustion were included into the Building Standard Law of Japan, and now the words "smoke exhaustion" are very familiar to those concerned with buildings in some way, such as designers, owners, managers and building officials. However, not many experiments have been conducted by now to examine the efficiencies of the smoke exhaustion systems installed to actual buildings, although this is quite understandable considering the various troubles associated with running fire experiments in the buildings in normal use.
On the other hand, in the International Exposition '85 held in Tsukuba, a number of pavilions were built with the smoke exhaustion systems of many types. And since those pavilions were all temporary, we could have a chance to carry out the experiments using several of them to study the smoke behaviors and the efficiencies of the smoke exhaustion systems after the exposition was over.
This paper reports the results of the experiment carried out in one of the pavilions. In this experiment, smoke filling behaviors in a space with a simple geometry and a large space capacity were investigated varying the size of fire source. The results of this experiment will be valuable as a data base for further in-depth studies on the behavior of smoke in buildings since this kind of field tests are rare. Also, it was found that the smoke filling speed in this pavilion can be predicted remarkably well with a simplified model which has been already proposed.View full abstractDownload PDF (959K) -
Setsuko SEGA1987 Volume 37 Issue 1 Pages 13-19
Published: 1987
Released on J-STAGE: March 14, 2012
JOURNAL FREE ACCESSNext to the previous investigation of the smouldering of cellulosic materials, a theoretical explanation was given for the transition from the steady burning to extinction. The steady burning-extinction phenomena of vertically downward smouldering along card-board strips were studied. For different sizes of strips, the critical temperature, at which the steady burning shifts to the unsteady burning or extinction, were measured. The results show that the critical ambient temperature rises with increase in size of strip, and that, above an surrounding temperature of 60 °C, no extinction occurs for any size of strip.View full abstractDownload PDF (444K) -
Kunihiro YAMASHITA1987 Volume 37 Issue 1 Pages 21-32
Published: 1987
Released on J-STAGE: March 14, 2012
JOURNAL FREE ACCESSIn this paper, author report the experimental results of the fire-danger rating of combustible forest materials. Hot air generator was used to ignite the various living and dead vegetables. Ignition temperature was decided as the minimum air temperature in which combustible materials ignite.
It is clarified that ignition temperature and ignition time for the same vegitable vary greatly with the conditions of activities (living or dead), moisture contents, and the degree of humus of the vegitable.
In the following, combustible materials were classified into several groups according to the obtained ignition time or ignition temperature.View full abstractDownload PDF (787K)
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