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Flame spreading over a liquid fuel floating on water stream

Research Project

Project/Area Number 15H03924
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionHirosaki University

Principal Investigator

ITO Akihiko  弘前大学, 理工学研究科, 客員研究員 (30127972)

Co-Investigator(Kenkyū-buntansha) 鳥飼 宏之  弘前大学, 理工学研究科, 准教授 (50431432)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords津波火災 / 燃え拡がり / 液体燃料 / 対向流燃え拡がり / 並行流燃え拡がり / 拡散火炎 / マランゴニ対流 / 燃え拡がり速度 / レーリー対流 / 対向流 / 火炎基部 / 熱輸送 / 可燃性液体 / シャドウグラフ法 / 凝縮相 / 対流 / 防災 / 流れの可視化 / Sub-flash
Outline of Final Research Achievements

In order to clarify the flame spreading mechanism of Tsunami fires, the combustion phenomena formed over a liquid fuel have been investigated experimentally. Two different kinds of flame spreading experiments were performed. One was the flame spreading formed over a liquid floating on a still water layer. The other was the opposed-flow flame spreading formed over a liquid fuel stream. As a result, it is seen that the spreading rate of the flame formed over still fuel and water layers becomes lower than that of the flame formed over a fuel layer. On the other hand, it is found that the spreading rate of the flame formed over the opposed fuel flow increases as the opposed fuel flow speed becomes larger. However, when the fuel flow speed is much larger than the flame spreading rate, the flame was flowed downstream.

Academic Significance and Societal Importance of the Research Achievements

東日本大震災で観察された津波火災という流れる海水上に浮いた液体燃料表面上の燃え拡がり現象について,従来の液体燃料上の燃え拡がりの知見をふまえて実験的にそして詳細に調べた.その結果,水に浮いている燃料の上に形成される火炎の方が,燃料層のみの上に形成された火炎よりも燃え拡がる速度が小さいことが分かった.これは,水の層が火炎の燃え拡がりを抑制することを意味している.また,対向する液体燃料流上に形成された火炎の燃え拡がり速度は,液体燃料流速の増加と伴に燃え拡がり速度が大きくなることが分かった.これは,火炎に対して水流の向きが燃え拡がり速度の増減を決定づけることを意味している.

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (12 results)

All 2018 2017 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Flame Spread over Liquid Fuel on a Water Layer-Basic Research on Tsunami Fire2017

    • Author(s)
      Shingo Kuwana, Hidekazu Tamizu, Akihiko Ito, Hiroyuki Torikai
    • Journal Title

      Open Journal of Safety Science and Technology

      Volume: 7 Issue: 01 Pages: 11-21

    • DOI

      10.4236/ojsst.2017.71002

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effect of Gravity on Radiative Heat Feedback on Small-Scale Pool Fires Using the Radiative Absorption Model2016

    • Author(s)
      Koei Yoshida, Ryo Takahashi, Hiroyuki Torikai, Akihiko Ito
    • Journal Title

      Modern Applied Science

      Volume: Vol. 10, No. 10 Issue: 10 Pages: 150-159

    • DOI

      10.5539/mas.v10n10p150

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] 液体燃料の流れに対向して燃え拡がる火炎 - 津波火災の基礎研究 -2018

    • Author(s)
      田水秀和,鳥飼宏之,伊藤昭彦
    • Organizer
      第56回燃焼シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Flame Spread over Liquid Fuel Floating on a Water Layer -Basic Research onTsunami Fire-2017

    • Author(s)
      Hidekazu Tamizu, Shingo Kuwana, Hiroyuki Torikai, and Akihiko Ito
    • Organizer
      8th International Symposium on Scale Modeling
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 流動するケロシン上の燃え拡 がり - 津波火災の基礎研究 -2017

    • Author(s)
      田水秀和、鳥飼宏之、伊藤昭彦
    • Organizer
      第55回燃焼シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] Effect of gravity on heat feedback of small-scale pool fires2016

    • Author(s)
      Ryo Takahashi, Akihiko Ito, Hiroyuki Torikai
    • Organizer
      5th World Congress on Petrochemistry and Chemical Engineering
    • Place of Presentation
      Phoenix, Arizona, USA
    • Year and Date
      2016-12-05
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 低レイノルズ数噴流拡散火炎の火炎形状に及ぼ す重力の影響2016

    • Author(s)
      中嶋 拓也, 鳥飼 宏之, 伊藤 昭彦
    • Organizer
      熱工学コンファレンス2016
    • Place of Presentation
      愛媛大学 城北キャンパス
    • Year and Date
      2016-10-22
    • Related Report
      2016 Annual Research Report
  • [Presentation] 水面に浮遊したケロシンの燃え拡がり2016

    • Author(s)
      桑名 伸吾, 田水 秀和,鳥飼 宏之, 伊藤 昭彦
    • Organizer
      熱工学コンファレンス2016
    • Place of Presentation
      愛媛大学 城北キャンパス
    • Year and Date
      2016-10-22
    • Related Report
      2016 Annual Research Report
  • [Presentation] 水面に浮遊した液体燃料の燃え拡がり2015

    • Author(s)
      桑名伸吾,佐々木航一朗,伊藤昭彦,鳥飼宏之
    • Organizer
      第53回燃焼シンポジウム
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2015-11-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 液面燃焼の熱フィードバック量に及ぼす重力の影響2015

    • Author(s)
      高橋諒,吉田孔瑛,伊藤昭彦,鳥飼宏之
    • Organizer
      第53回燃焼シンポジウム
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2015-11-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 中嶋拓也,鳥飼宏之,伊藤昭彦2015

    • Author(s)
      低レイノルズ数噴流拡散火炎の火炎構造に及ぼす重力の影響
    • Organizer
      第53回燃焼シンポジウム
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2015-11-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 水面に浮遊した液体燃料の燃え拡がり2015

    • Author(s)
      桑名伸吾,佐々木航一朗,伊藤昭彦,鳥飼宏之
    • Organizer
      平成27年度日本火災学会研究発表会
    • Place of Presentation
      山形大学米沢キャンパス
    • Year and Date
      2015-05-16
    • Related Report
      2015 Annual Research Report

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Published: 2015-04-16   Modified: 2020-03-30  

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