Upward and Downward Smoldering in RDF (Reduced-Derived Fuel) Layer
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- YASHIMA Masaaki
- National Institute of Occupational Safety and Health
Bibliographic Information
- Other Title
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- RDF堆積層内の上方と下方の燃え拡がり
- RDF タイセキソウ ナイ ノ ジョウホウ ト カホウ ノ モエ ヒロガリ
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Abstract
The effect of direction of spread, natural convection, sample size, void fraction, etc. on fire spread in the piled RDF (RDF fixed bed) was examined experimentally. RDF samples were produced cylindrically from general domestic garbage, and different size of sample ; 15.5 mm (D) × 37.1 mm (L) and 28.6 mm (D) × 50.5 mm (L) were used. Temperature change, temperature profile and spread rate of fire in the layer were measured. As a result of the experiment, when the bottom side in the layer is closed, the downward fire spreads faster than that of upward. And also, the fire spreads faster in the case of bottom side opened than it in the case of bottom side closed. It is found that the spread rate of smoldering increases with sample size or void fraction in natural convection. Though it is adiabatic for large void fraction in RDF layer, the smoldering continues by inflow air to the clearance. The effective thermal conductivity of powder packed bed was applied in RDF layer, and the effect of sample size, shape, void fraction, inflow air velocity on the fire spread was evaluated.
Journal
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- Bulletin of Japan Association for Fire Science and Engineering
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Bulletin of Japan Association for Fire Science and Engineering 59 (2), 42-54, 2009
Japan Association for Fire Science and Engineering
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Details 詳細情報について
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- CRID
- 1390282680925952640
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- NII Article ID
- 130005403769
- 10024799906
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- NII Book ID
- AN0018688X
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- ISSN
- 18835600
- 05460794
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- NDL BIB ID
- 10358272
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed