低圧における液滴間燃え広がりの微小重力実験

• 三上 真人

  山口大学大学院理工学研究科

• 佐野 成太

  山口大学大学院理工学研究科

• SAPUTRO Herman

  山口大学大学院理工学研究科

• 渡利 英貴

  山口大学大学院理工学研究科

• 瀬尾 健彦

  山口大学大学院理工学研究科

書誌事項

タイトル別名

• Microgravity Experiment of Flame Spread over Droplets at Low Pressure

抄録

This research conducted microgravity experiments of flame spread over fuel-droplet arrays at a low pressure in order to improve understanding of the flame spread in fuel sprays under high-altitude relight condition of jet engines. The results show that both the flame-spread rate and flame-spread limit distance at the low pressure are greater than those at atmospheric pressure. The pressure effect on the flame-spread rate was discussed considering some elementary processes, such as droplet heating and thermal diffusion. The thermal diffusion speed is inversely proportional to the pressure. The pressure effect on the flame-spread limit distance was discussed considering transient process of high-temperature region around a burning droplet. The maximum radius of the outer edge of the high-temperature region is proportional to -1/3 power of the ambient pressure. Group combustion occurrence was also demonstrated with a percolation model considering the flame-spread limit.

収録刊行物

• International Journal of Microgravity Science and Application

  International Journal of Microgravity Science and Application 31 (4), 172-, 2014-10-31

  日本マイクログラビティ応用学会

キーワード

• Droplet
• Flame spread
• Low pressure
• Microgravity experiment

詳細情報

• CRID: 1390848250110941824
• NII論文ID: 130007842456
• DOI: 10.15011/jasma.31.4.172
• ISSN: 21889783
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可