Development of a fire-spotting model and its applications to fire spread simulations and renewal plans of water sources for firefighting in a densely populated wooden building district

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02310
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 23020:Architectural environment and building equipment-related
• Research Institution: Nagoya University
• Principal Investigator: Iizuka Satoru 名古屋大学, 環境学研究科, 教授 (40356407)
• Co-Investigator(Kenkyū-buntansha): 廣井 悠 東京大学, 大学院工学系研究科(工学部), 教授 (50456141) ; 吉岡 英樹 東京大学, 大学院工学系研究科(工学部), 准教授 (90462564)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 飛び火延焼 / 木造密集市街地 / 火災延焼予測 / 消防水利

Outline of Final Research Achievements

In this study, a new model that simulates spotting fires, which are a factor in the spread of fire, was developed. Fire spread simulations were conducted for a densely populated wooden building district in Nagoya, Aichi Prefecture, by the CFD (computational fluid dynamics)-based simulation model introducing the developed fire-spotting model. In addition, a relational expression between the burned area of past wooden building fires and the required amount of fire extinguishing water was derived, and based on the relational expression and the fire spread simulation results, a simple examination of renewal plans of water sources for firefighting was performed.

Free Research Field

建築・都市環境工学

Academic Significance and Societal Importance of the Research Achievements

本研究チームが知る限り、木造密集市街地火災を対象としたCFDベースの火災延焼シミュレーションモデルの開発（飛び火延焼モデルの開発を含む）と応用は国内外で例がなく、本研究成果は学術的新規性が高いとともに、迅速な消火活動や適切な消防水利の事前検討に資するより正確な火災延焼予測が可能となり得る点で社会的意義も高い。