Systematization and application of physics of fire extinguishment by water mist

2016 Fiscal Year Final Research Report

• Project/Area Number: 26282098
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: Tokyo Denki University
• Principal Investigator: Yoshida Akira 東京電機大学, 工学部, 教授 (40105680)
• Co-Investigator(Kenkyū-buntansha): 西岡 牧人 筑波大学, システム情報工学研究科(系), 教授 (70208148)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 火災 / 消防 / 防災 / 燃焼 / 消火

Outline of Final Research Achievements

Counterflow diffusion flame and co-flowing diffusion flame were employed for the study of suppression effectiveness of water mist. Flame speed was measured in the premixed flame stablized in the stagnation flowfield and the effect of water mist on ignition and flame propagation in a vessel were investigated. Experiments were compared with the numerical simulation. Critical stretch rate at extinguishment decreases with water mist mass fraction and the flame speed decreases with water mist addition. Flame speed at the flame base of co-flowing diffusion flame decreases and the flame readily blows off. Minimum ignition energy inceases with the water mist addition and water mist makes the combustible mixture more difficult to be ignited. Fire suppression effectiveness of water mist was clearly shown by experiments and numerical simulations.

Free Research Field

燃焼工学