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Smoke flow prediction based on mass consistent flow model

Research Project

Project/Area Number 18H01593
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 23020:Architectural environment and building equipment-related
Research InstitutionYokohama National University

Principal Investigator

Oka Yasushi  横浜国立大学, 大学院環境情報研究院, 教授 (10240764)

Co-Investigator(Kenkyū-buntansha) 松山 賢  東京理科大学, 理工学研究科国際火災科学専攻, 教授 (10307704)
上矢 恭子  公立諏訪東京理科大学, 工学部, 講師 (10803356)
岡 秀行  国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (80399518)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Keywords煙流動予測 / 質量保存流速モデル / 火災リスク / 煙流動 / MASCONモデル / 天井流
Outline of Final Research Achievements

Basic research was conducted to develop a smoke flow prediction tool based on the mass consistent flow model. In the mass consistent flow model, the accuracy of the primary velocity set in the target space as the first step in conducting the numerical calculation affects the analysis result.
In this study, in order to predict the smoke propagation phenomena induced by a fire that occurs in a horizontally elongated space, prediction formulae that estimate the primary velocity field in the shooting and tranquil regions were developed by incorporating the rectangular cross-sectional aspect ratio. These velocity prediction formulas are represented by dimensionless variables. We also developed the relational equations that represent the smoke layer thickness, temperature and velocity attenuations, which are the main variables for converting into dimensional variables.

Academic Significance and Societal Importance of the Research Achievements

建物火災における避難計画の策定やリスク評価では,多数のシナリオを検討する必要がある。各シナリオにおける煙・燃焼生成ガスの拡散状況を予測するためのツールには,計算精度と計算コストのバランスが要求される。
本研究では,質量保存流速モデルにもとづく数値予測手法を建築火災安全工学分野への導入を試みる。このモデルにより,二層ゾーンモデルよりも詳細情報が,また数値流体力学モデルに基づく数値解析よりも高速で,同等の3次元情報を得られることから,新規の火災リスクアセスメントツールとして期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (7 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Temperature and velocity distributions of a ceiling-jet along a flat-ceilinged tunnel with natural ventilation2020

    • Author(s)
      Oka Yasushi、Oka Hideyuki
    • Journal Title

      Fire Safety Journal

      Volume: 112 Pages: 102969-102969

    • DOI

      10.1016/j.firesaf.2020.102969

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Temperature and Velocity Distributions within a Ceiling-jet along a Flat-ceilinged Horizontal Tunnel with Natural Ventilation2019

    • Author(s)
      Oka, Y. and Oka, H.
    • Organizer
      9th International Seminar on Fire and Explosion Hazards
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simple Prediction Model for Temperature Attenuation of Fire-Induced Ceiling Flow in Consideration of the Side Wall Effects along a Flat-ceilinged Tunnel2019

    • Author(s)
      Tanno, A., Oka, H., and Oka, Y.
    • Organizer
      12th Asia-Pacific Conference on Combustion
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 質量保存流速場モデルを用いた閉囲空間における複雑気流場の簡易予測手法の開発2019

    • Author(s)
      木村新太,岡 秀行,岡 泰資
    • Organizer
      安全工学シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Temperature and velocity distributions within a ceiling-jet along a flat-ceilinged horizontal tunnel with natural ventilation2019

    • Author(s)
      Oka, Y. and Oka, H.
    • Organizer
      9th International Seminar on Fire and Explosion Hazards
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 数値計算に基づく水平方向に細長い空間内の火災熱気流挙動2019

    • Author(s)
      須賀龍之介,岡 泰資,岡 秀行
    • Organizer
      平成31年度日本火災学会研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 矩形通路の側壁の影響を考慮した天井流の温度減衰簡易予測式の提案2018

    • Author(s)
      丹野 碧,岡 秀行,岡 泰資
    • Organizer
      第51回安全工学研究発表会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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