Development of an urban fire simulation based on wind and combustion interaction analysis

• Project/Area Number: 17K06541
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nihon University
• Principal Investigator: HASEBE Hiroshi 日本大学, 理工学部, 准教授 (60366565)
• Co-Investigator(Kenkyū-buntansha): 野村 卓史 日本大学, 理工学部, 特任教授 (50126281)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 市街地火災 / 風況 / 火災の延焼速度 / ポータブルマルチファン風洞 / アイソジオメトリック解析 / 風と火災の連成解析 / 燃焼実験 / NURBS / ハイブリッド並列解析 / 火災シミュレーション / 木材燃焼実験 / 放射解析 / 自作風洞 / 燃焼解析 / 風況解析

Outline of Final Research Achievements

The present study aims to develop a new urban fire simulation that combines wind and combustion interaction analyses in order to the prediction and prevention of urban fires. We developed a unique wind tunnel method and apparatus for fire spread rate measurement. We also measured the fire spread rate up to a wind speed of about 3 m/s at the laboratory level. In addition, an isogeometric analysis was introduced to accurately represent the complex shapes of buildings in urban areas. We incorporated into our interaction analysis of wind and fire based on the isogeometric analysis.

Academic Significance and Societal Importance of the Research Achievements

風が火災の延焼速度を増加させることは広く知られているが，実験施設の関係から定量的な評価が難しかった．本研究では，独自の装置を開発し，風が火災の延焼速度に及ぼす影響を定量的に評価した．風と火災の関連現象の解明に貢献すると考えられる．さらに，市街地風況解析のために，アイソジオメトリック解析法を導入した．昨今，都市の3Dモデルが公開され，ますますCADと解析の関係性は強まる傾向にある．そのような観点からも有効な解析法である．これらを組み合わせることで，市街地火災の予測に有益な解析法を構築する素地は整ったと考えられる．

Research Products

• [Journal Article] Analysis for High temperature and Variable Density Flows (2019)
  • Author(s): Hiroshi Hasebe
  • Journal Title: Proceedings of the 7th Asia-Pacific Congress on Computational Mechanics Volume: - Pages: 666-666
• [Journal Article] Development of a fluid combustion interaction analysis for the wildfire simulation (2018)
  • Author(s): Hiroshi Hasebe, Toru Oyaide, Hiroya Suzuki and Takashi Nomura
  • Journal Title: Proceedings of International Workshop on Wind Related Disasters and Mitigations Volume: -
• [Journal Article] Numerical Study on the Airflow Characteristics Caused by Wood Combustion (2017)
  • Author(s): Hiroshi Hasebe, Toru Oyaide, Hiroya Suzuki and Takashi Nomura
  • Journal Title: Proceedings of 16th International Conference on Automatic Fire Detection & Suppression, Detection and Signaling Research and Applications Conference Volume: 1 Pages: 261-268
  • Peer Reviewed
• [Presentation] ポータブルマルチファン風洞の試作 (2020)
  • Author(s): 長谷部寛, 高橋勇成, 菊池耶麻刀, 草野拓哉
  • Organizer: 土木学会第75回年次学術講演会概要集
• [Presentation] NURBSソリッド要素を用いたはりのアイソジオメトリック解析 (2020)
  • Author(s): 唐澤奈央子, 箕輪瑠衣, 長谷部寛
  • Organizer: 第25回計算工学講演会論文集
• [Presentation] NURBSソリッド要素を用いた曲がりばりのアイソジオメトリック解析 (2020)
  • Author(s): 唐澤奈央子, 長谷部寛
  • Organizer: 土木学会第75回年次学術講演会概要集
• [Presentation] ポータブルマルチファン風洞の試作 (2020)
  • Author(s): 長谷部寛，高橋勇成，菊池耶麻刀，草野拓哉
  • Organizer: 土木学会第75回年次学術講演会概要集
• [Presentation] Bスプライン基底関数を用いた自然対流のアイソジオメトリック解析 (2019)
  • Author(s): 長谷部寛
  • Organizer: 第24回計算工学講演会
• [Presentation] An Attempt to Measure the Speed of Fire Spread in the Wind (2019)
  • Author(s): Hiroshi Hasebe, Gaku Kawai, Kenta Nakazawa, Yamato Kikuchi, Yuna Takahashi, Takashi Nomura
  • Organizer: The 15th International Conference on Wind Engineering
  • Int'l Joint Research
• [Presentation] VMS有限要素法によるキャビティ内の自然対流の解析 (2017)
  • Author(s): 長谷部寛, 鈴木宏哉, 野村卓史
  • Organizer: 計算工学講演会