Flame-Spread Characteristics of Droplet-Cloud Element with Two-Droplet Interaction at High Pressure in Microgravity

• IWAI Kentaro

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University

• YOSHIDA Yasuko

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University

• MOTOMATSU Naoya

  Graduate School of Science and Engineering, Yamaguchi University

• SEO Takehiko

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University

• MIKAMI Masato

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University

抄録

Spray combustion is widely used in gas turbines, diesel engines, jet engines, boiler and oil-fired heaters. It is indispensable for life and industry. In order to improve understanding of the flame-spread mechanism in the fuel sprays, many researchers have conducted microgravity experiments on the flame-spread of fuel-droplet arrays and droplet-cloud elements. The effect of ambient pressure on the flame-spread phenomena has also been investigated. This research involves microgravity experiments being conducted on the flame spread over droplet-cloud elements at high-pressure condition. The droplet-cloud element consists of three droplets, Droplets B, A and L. Droplets B and A are interactive droplets. Droplet L is the droplet to investigate the characteristics of flame spread from Droplet A. The results suggest that interactive combustion between Droplets B and A increases the flame-spread-limit distance from Droplet A to Droplet L at 200 kPa. The 1200 K position of the thermal layer around Droplet A also increases with the interactive combustion. This research also conducted the flame spread to Droplet L in the perpendicular direction, y-direction, to the direction from Droplet B to Droplet A, x direction. The results suggest that interactive combustion between Droplets B and A increases the y-direction flame-spread-limit distance to Droplet L more than the x-direction flame-spread-limit distance.

収録刊行物

• TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

  TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 16 (6), 494-499, 2018

  一般社団法人 日本航空宇宙学会

キーワード

• Flame Spread
• Droplet Cloud
• Droplet Interaction
• Pressure Effect
• Microgravity Experiment

詳細情報

• CRID: 1390282763041458816
• NII論文ID: 130007481363
• DOI: 10.2322/tastj.16.494
• ISSN: 18840485
• Web Site: https://www.jstage.jst.go.jp/article/tastj/16/6/16_494/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可