Analysis of Smoke Front Movement under Horizontal and Inclined Ceilings by Two Zone Model Subdivided in the Moving Direction of the Smoke Front

• MATSUSHITA Takayuki

  Department of Architecture and Civil Engineering, Faculty of Engineering, Kobe University

• OGURA Daisuke

  Department of Architecture and Civil Engineering, Faculty of Engineering, Kobe University

• UNO Minoru

  Daidan Co.

Bibliographic Information

Other Title

• 進行方向細分割型2層モデルによる水平及び傾斜した天井面での煙先端部の移動性状
• シンコウ ホウコウ サイブンカツガタ 2ソウ モデル ニ ヨル スイヘイ オヨビ ケイシャ シタ テンジョウメン デ ノ ケムリ センタンブ ノ イドウ セイジョウ

Abstract

A mathematical model is proposed to describe the spread rate of a smoke front under horizontal and inclined ceiling. The smoke flow is treated as two zone flow, and both the smoke and air layers are divided into smaller sections in the moving direction of smoke front. The heat loss to wall and the entrainment of ambient air are taken into consideration in this paper. The entrainment theory by Morton et al. is modified by assuming the entrainment rate of ambient air to be proportional to a sine of the inclined ceiling angle. <br>To substantiate the validity of this model, the calculated results by this model are compared with the results of the full scale and model experiments. The proposed model is valid to predict the smoke front movement under horizontal and inclined ceiling of up to 75 degrees of slope angle until the smoke front reaches the floor.

Journal

• Bulletin of Japan Association for Fire Science and Engineering

  Bulletin of Japan Association for Fire Science and Engineering 53 (1), 23-30, 2003

  Japan Association for Fire Science and Engineering

Details

• CRID: 1390282680924549888
• NII Article ID: 10011737702
• NII Book ID: AN0018688X
• DOI: 10.11196/kasai.53.1_23
• ISSN: 18835600
• ISSN: 05460794
• NDL BIB ID: 6634219
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6634219
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed