巻号一覧
35 巻 (1985)
- 2 号 p. 23-
- 1 号 p. 1-
35 巻, 1 号
選択された号の論文の3件中1～3を表示しています
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論文
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桜井 寛, 林 太郎1985 年 35 巻 1 号 p. 1-8
発行日: 1985年
公開日: 2012/06/04
ジャーナル フリーIt is measured by model experiment that the disturbed state of the air shutter for fire prevention influenced by passing crowds and the state of smoke drawn by crowds into the safety zone.
In experiment, the flowing way of smoke is coincided with the expansile direction.
The results are as follows.
(1) The larger the value of the push-pull flow ratio, Q3 /Q1, the less the length of smoke drawn by dolls into the safety zone and also the recovery time.
(2) The changes of the value of the side flow-doll velocity ratio influence on the values of the recovery ratio which are expressed by
(Q3 /Q1) recovery I / (Q3 /Q1) limit
(3) The kinds of patterns of dolls influence on the values of the recovery ratio.
(4) If the values of Q3 /Q1 increase, the values of Qs also increase and the values of vs do, and this means that they act effectively in accordance with the increase of the values of vs.
(5) When side flow volume, Q0, is constant, the values of the recovery ratio in the case of uniform side velocity distribution have also the same values with the cases of varied ones which have large at ceiling parts and small at floor parts.
(6) The safety rates influenced by passing crowds are obtained.抄録全体を表示PDF形式でダウンロード (858K) -
瀬賀 節子, 佐藤 研二1985 年 35 巻 1 号 p. 9-15
発行日: 1985年
公開日: 2012/06/04
ジャーナル フリーA transition condition from smoldering spread to flaming spread along cylindrical cellulosic materials was studied by examining the effect of ambient oxygen concentration Xo. The effect of gas composition at the surface of char oxidation zone on the transition was explored. In the experiments, cardboard cylinder and filter paper cylinder were used as test materials, and the measurements of the concentration of H2, CH4, CO, CO2, and O2, were conducted by gas-chromatography.
The following results were obtained.
(1) In the case of steady smoldering spread, the measured gas concentrations at the surface of cylinder increases as the cylinder diameter decreases. Also, the concentrations of those gases in an upward spread are higher than those in a downward spread.
(2) The gas concentrations at the surface increase with the ambient oxygen concentration Xo.
(3) In the case of upward smoldering spread, the estimated value of CO at the surface on the transition for the filter paper cylinder is much higher than that for the cardboard cylinder, while in the case of downward smoldering spread, the estimated CO concentrations on the transition for the two materials do not differ so much.
Based on the experimental results, we discussed a transition condition from smoldering spread to flaming spread.抄録全体を表示PDF形式でダウンロード (471K) -
土屋 能男, 仲谷 一郎1985 年 35 巻 1 号 p. 17-22
発行日: 1985年
公開日: 2012/06/04
ジャーナル フリーIt is desirable to have a generally applicable numerical method to estimate the toxicity effect (or, for more practical purposes, allowable escape time from a burning building) without resorting to routine animal experiments. The present authors have formulated equations to calculate the toxicity effect using a new concept, the ‘effective concentration’. Constants in the equations, specific for individual toxic gases and combinations of them, have been computed from the results of animal experiments available in the literature. In these experiments mice were exposed to six diffeent toxic gases individually and to two- or three-component mixtures of them, and the incapacitation times were measured.抄録全体を表示PDF形式でダウンロード (354K)
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