巻号一覧
34 巻 (1984)
- 2 号 p. 25-
- 1 号 p. 1-
34 巻, 2 号
選択された号の論文の2件中1～2を表示しています
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論文
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北原 良哉, 梅津 実1985 年 34 巻 2 号 p. 25-37
発行日: 1985年
公開日: 2012/07/04
ジャーナル フリーIn the previous report, we investigated the temperature and velocity fields of hot-layer along the ceiling in the full-scale and model tunnels.
The purpose of the present study is to clarify the relation between these experimental results and related parameters such as physical size of tunnel, burning rate of fire source, and Froude and/or Stanton numbers. An analytical approach to the evaluations of the attenuation coefficients of velocity and excess temperature with distance along the tunnel is made using a two-dimensional steady-state model consisting of a fire plume, an impinging over the assumptions employed, the estimated results are shown to be in reasonable agreement with the experimental data.抄録全体を表示PDF形式でダウンロード (870K) -
瀬賀 節子, 佐藤 研二1985 年 34 巻 2 号 p. 39-44
発行日: 1985年
公開日: 2012/07/04
ジャーナル フリーThe conditions of the transition from smoldering spread to flaming spread were investigated experimentally for two types of cellulosic materials. The fuels were homogeneous cylinders made of cardboard or filter paper with different diameters. They were setted vertically in an apparatus for oxygen index measurements.
A critical value of the ambient oxygen concentration (mole fraction) Xoc for the transition was determined and the maximum surface temperature of the cylinder was measured by fine wire thermocouple.
Following results were obtained.
i) For downward spread, Xoc decreases and approaches to a constant value as the cylinder diameter increases, but for upward spread, Xoc changes very slightly with the diameter.
ii) The maximum surface temperature near the critical condition increases as the cylinder diameter decreases.抄録全体を表示PDF形式でダウンロード (513K)
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