Systematization and application of physics of fire extinguishment by water mist

• 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
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000); Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2015: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
• Keywords: 火災 / 消防 / 防災 / 燃焼 / 消火 / ウォーターミスト / 拡散火炎 / 予混合火炎 / 爆発

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.

Research Products

• [Journal Article] Effect of Water Mist on Minimum Ignition Energy of Propane/Air Mixture (2017)
  • Author(s): Ebina, W., Liao, C., Naito, H., Yoshida, A.
  • Journal Title: Proceedings of the Combustion Institute Volume: 36 Issue: 2 Pages: 3271-3278
  • DOI: 10.1016/j.proci.2016.06.019
  • Peer Reviewed
• [Journal Article] ウォーターミストによるメタン‐空気対向流拡散火炎の消炎現象に関する数値計算 (2017)
  • Author(s): 蝦名 航，吉田 亮
  • Journal Title: 日本燃焼学会誌 Volume: 59
• [Journal Article] Inhibition of Propane/Air Premixed Flame by Water Mist (2016)
  • Author(s): Okawa, T., Ebina, W., Naito, H., Yoshida, A.
  • Journal Title: Fire Science and Technology 2015 Volume: 10 Pages: 903-911
  • DOI: 10.1007/978-981-10-0376-9_93
  • ISBN: 9789811003752, 9789811003769
  • Peer Reviewed
• [Journal Article] Inhibition of Counterflow Methane/Air Diffusion Flame by Water Mist with Varying Droplet Diameters (2015)
  • Author(s): Akira Yoshida, Koki Kashiwa, Shuhei Hashizume, Hiroyoshi Naito
  • Journal Title: Fire Safety Journal Volume: 71 Pages: 217-225
  • Peer Reviewed
• [Journal Article] Experimental and Numerical Investigation of Flame Speed Retardation by Water Mist (2015)
  • Author(s): Akira Yoshida, Toichiro Okawa, Wataru Ebina, Hiroyoshi Naito
  • Journal Title: Combustion and Flame Volume: 162 Issue: 5 Pages: 1772-1777
  • DOI: 10.1016/j.combustflame.2014.11.038
  • Peer Reviewed
• [Journal Article] Suppression Effectiveness of Water Mist on Accidental Aircraft Fires (2014)
  • Author(s): Akira Yoshida, Wataru Ebina, Toichiro Okawa
  • Journal Title: Proceedings of ICAS2014 Volume: 29
  • Peer Reviewed
• [Presentation] ウォーターミストによる着火抑制効果－プロパン‐空気予混合気の最小着火エネルギー密度－ (2016)
  • Author(s): 中原佳祐，廖 赤虹，内藤浩由，吉田 亮
  • Organizer: 第54回燃焼シンポジウム
  • Place of Presentation: 宮城，仙台
  • Year and Date: 2016-11-23
• [Presentation] 重力を考慮した数値解析によるウォーターミストの消火機構の研究 (2016)
  • Author(s): 山田雄大，吉田 亮，西岡牧人
  • Organizer: 第54回燃焼シンポジウム
  • Place of Presentation: 宮城，仙台
  • Year and Date: 2016-11-23
• [Presentation] ウォーターミストがメタン‐空気対向流乱流拡散火炎の消炎に及ぼす影響 (2016)
  • Author(s): 松尾涼平，内藤浩由，吉田 亮
  • Organizer: 第54回燃焼シンポジウム
  • Place of Presentation: 宮城，仙台
  • Year and Date: 2016-11-23
• [Presentation] 同軸流拡散火炎のリフト高さに及ぼす周囲空気流とウォーターミストの影響 (2016)
  • Author(s): 浅野慎一、吉田 亮
  • Organizer: 第54回燃焼シンポジウム
  • Place of Presentation: 宮城，仙台
  • Year and Date: 2016-11-23
• [Presentation] Inhibition Effectiveness of Water Mist on Ignition of Propane/Air Mixture (2016)
  • Author(s): Nakahara, K., Liao, C., Naito, H., and Yoshida, A.
  • Organizer: 16th International Water Mist Conference
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2016-09-21
  • Int'l Joint Research
• [Presentation] Effect of Water Mist on Minimum Ignition Energy of Propane/Air Mixture (2016)
  • Author(s): Ebina, W., Liao, C., Naito, H., and Yoshida, A.
  • Organizer: 36th International Symposium on Combustion
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] Effect of Water Mist on Liftoff Height of Jet Diffusion Flames in Co-Flowing Air (2016)
  • Author(s): Asano, S., and Yoshida, A.
  • Organizer: 36th International Symposium on Combustion
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] Extinguishment of Counterflow Diffusion Flame by Polydisperse Water Mist with Various Sauter Mean Diameters (2016)
  • Author(s): Matsuo, R., Naito, H., and Yoshida, A.
  • Organizer: 36th International Symposium on Combustion
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] 対向流拡散火炎の消炎限界伸長率にウォーターミスト粒径および流量の及ぼす影響 (2016)
  • Author(s): 松尾涼平，内藤浩由，吉田 亮
  • Organizer: 平成28年度日本火災学会研究発表会
  • Place of Presentation: 新潟，長岡
  • Year and Date: 2016-05-16
• [Presentation] 同軸流拡散火炎のリフト高さに及ぼすウォーターミストの影響 (2016)
  • Author(s): 浅野慎一，吉田 亮
  • Organizer: 平成28年度日本火災学会研究発表会
  • Place of Presentation: 新潟，長岡
  • Year and Date: 2016-05-16
• [Presentation] ウォーターミストによる着火抑制効果－熱線の溶断時間の影響－ (2016)
  • Author(s): 中原佳祐，廖 赤虹，内藤浩由，吉田 亮
  • Organizer: 平成28年度日本火災学会研究発表会
  • Place of Presentation: 新潟，長岡
  • Year and Date: 2016-05-16
• [Presentation] プロパン‐空気予混合気の最小着火エネルギーに及ぼすウォーターミストの影響 (2015)
  • Author(s): 蝦名 航，廖 赤虹，内藤浩由，吉田亮
  • Organizer: 第53回燃焼シンポジウム
  • Place of Presentation: 茨城、つくば
  • Year and Date: 2015-11-16
• [Presentation] ウォーターミスト粒径がプロパン空気予混合火炎の層流燃焼速度に及ぼす影響 (2015)
  • Author(s): 大川統一朗，内藤浩由，吉田亮
  • Organizer: 第53回燃焼シンポジウム
  • Place of Presentation: 茨城、つくば
  • Year and Date: 2015-11-16
• [Presentation] 対向流予混合双子火炎の局所燃焼速度に与えるウォーターミストの影響 (2015)
  • Author(s): 山田雄大，吉田亮，西岡牧人
  • Organizer: 第53回燃焼シンポジウム
  • Place of Presentation: 茨城、つくば
  • Year and Date: 2015-11-16
• [Presentation] Inhibition of Propane/Air Premixed Flame by Water Mist (2015)
  • Author(s): Okawa, T., Ebina, W., Naito, H., and Yoshida, A.
  • Organizer: 10th Asia-Oceania Symposium on Fire Science and Technology
  • Place of Presentation: Ｔｓｕｋｕｂａ, Ibaraki, Ｊａｐａｎ
  • Year and Date: 2015-10-05
  • Int'l Joint Research
• [Presentation] Influence of Water Mist on Ignition of Propane/air Mixture (2015)
  • Author(s): Ebina, W., Liao, C., Naito, H., and Yoshida, A.
  • Organizer: The 10th Asia-Pacific Conference on Combustion
  • Place of Presentation: Ｂｅｉｊｉｎｇ, Ｃｈｉｎａ
  • Year and Date: 2015-07-19
  • Int'l Joint Research
• [Presentation] Extinguishment of Counterflow Diffusion Flame by Water Mist with Various Diameters and Mass Fractions (2015)
  • Author(s): Hashizume, S., Naito, H., and Yoshida, A.
  • Organizer: The 10th Asia-Pacific Conference on Combustion
  • Place of Presentation: Ｂｅｉｊｉｎｇ, Ｃｈｉｎａ
  • Year and Date: 2015-07-19
  • Int'l Joint Research
• [Presentation] プロパン‐空気予混合火炎の燃焼速度と火炎温度に及ぼすウォーターミストの影響 (2015)
  • Author(s): 大川統一朗，内藤浩由，吉田亮
  • Organizer: 平成27年度日本火災学会研究発表会
  • Place of Presentation: 山形、米沢
  • Year and Date: 2015-05-16
• [Presentation] プロパン‐空気予混合気の着火に及ぼすウォーターミストの影響 (2015)
  • Author(s): 蝦名 航，廖 赤虹，内藤浩由，吉田亮
  • Organizer: 平成27年度日本火災学会研究発表会
  • Place of Presentation: 山形、米沢
  • Year and Date: 2015-05-16
• [Presentation] ウォーターミストによる対向流拡散火炎の消炎―ミスト粒径および質量分率の影響― (2015)
  • Author(s): 橋爪脩平，内藤浩由，吉田亮
  • Organizer: 平成27年度日本火災学会研究発表会
  • Place of Presentation: 山形、米沢
  • Year and Date: 2015-05-16
• [Presentation] ウォーターミストによる対向流拡散火炎の消炎現象に関する数値解析 (2014)
  • Author(s): 蝦名 航，吉田 亮
  • Organizer: 第52回燃焼シンポジウム
  • Place of Presentation: 岡山コンベンションセンター(岡山)
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] ウォーターミストによる同軸流拡散火炎のリフト火炎の消炎現象に及ぼすリム厚さの影響 (2014)
  • Author(s): 大橋直人，内藤浩由，吉田 亮
  • Organizer: 第52回燃焼シンポジウム
  • Place of Presentation: 岡山コンベンションセンター(岡山)
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] 対向流拡散火炎におけるウォーターミストの消炎機構に関する数値解析 (2014)
  • Author(s): 菅野将俊，吉田 亮，西岡牧人
  • Organizer: 第52回燃焼シンポジウム
  • Place of Presentation: 岡山コンベンションセンター(岡山)
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Experimental Study of Extinguishment of Confined Propane/Air Diffusion Flame by Water Mist (2014)
  • Author(s): Naoto Ohashi, Hiroyoshi Naito, Akira Yoshida
  • Organizer: 35th International Symposium on Combustion
  • Place of Presentation: サンフランシスコ(アメリカ)
  • Year and Date: 2014-08-03 – 2014-08-08
• [Presentation] Measurement of Suppression Effectiveness of Water Mist with Varying Diameter Using Counterflow Methane/Air Diffusion Flames (2014)
  • Author(s): Shuhei Hashizume, Hiroyoshi Naito, Akira Yoshida
  • Organizer: 35th International Symposium on Combustion
  • Place of Presentation: サンフランシスコ(アメリカ)
  • Year and Date: 2014-08-03 – 2014-08-08
• [Presentation] Experimental and Numerical Study of Laminar Flame Speed Retardation by Water Mist (2014)
  • Author(s): Toichiro Okawa, Wataru Ebina, Hiroyoshi Naito, Akira Yoshida
  • Organizer: 35th International Symposium on Combustion
  • Place of Presentation: サンフランシスコ(アメリカ)
  • Year and Date: 2014-08-03 – 2014-08-08
• [Presentation] プロパン-空気予混合火炎に及ぼすウォーターミストの化学的抑制効果 (2014)
  • Author(s): 蝦名 航，吉田 亮
  • Organizer: 平成26年度火災学会研究発表会
  • Place of Presentation: 東京理科大学森戸記念館(東京)
  • Year and Date: 2014-05-27 – 2014-05-28
• [Presentation] よどみ流中に形成されるプロパン-空気予混合火炎の燃焼速度に及ぼすウォーターミストの影響 (2014)
  • Author(s): 大川統一朗，内藤浩由，吉田 亮
  • Organizer: 平成26年度火災学会研究発表会
  • Place of Presentation: 東京理科大学森戸記念館(東京)
  • Year and Date: 2014-05-27 – 2014-05-28
• [Presentation] 同軸流拡散火炎のリフト火炎の安定性に及ぼすウォーターミストの影響 (2014)
  • Author(s): 大橋直人，吉田 亮
  • Organizer: 平成26年度火災学会研究発表会
  • Place of Presentation: 東京理科大学森戸記念館(東京)
  • Year and Date: 2014-05-27 – 2014-05-28