Formulation of dispersed phase combustion physics at low pressure for evaluation of engine high-altitute relight performance

• Project/Area Number: 24360350
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Yamaguchi University
• Principal Investigator: MIKAMI Masato 山口大学, 理工学研究科, 教授 (20274178)
• Co-Investigator(Kenkyū-buntansha): SEO Takehiko 山口大学, 大学院理工学研究科, 准教授 (00432526)
• Co-Investigator(Renkei-kenkyūsha): KIKUCHI Masao 宇宙航空研究開発機構, 宇宙科学研究所, 研究員 (80371144) ; MORIUE Osamu 九州大学, 大学院工学研究員, 准教授 (70363124)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
• Keywords: 燃焼 / 液滴 / 燃え広がり / 低圧 / 液滴群

Outline of Final Research Achievements

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.

Research Products

• [Journal Article] 低圧における液滴間燃え広がりの微小重力実験 (2014)
  • Author(s): 三上真人，佐野成太，Herman SAPUTRO，渡利英利，瀬尾健彦
  • Journal Title: 日本マイクログラビティ応用学会誌 Volume: 31 Pages: 172-178
  • NAID: 130007842456
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Simulating flame-spread behavior in large scale of droplet clouds with considering two-droplet interaction (2014)
  • Author(s): Saputro, H., Seo, T., Mikami, M.
  • Journal Title: Proceedings of the 17th Annual Conference of ILASS-Asia Volume: USB
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 微小重力場低圧雰囲気における不等間隔燃料液滴列の燃え広がり特性の実験的調査 (2014)
  • Author(s): 佐野成太，瀬尾健彦，三上真人
  • Organizer: 日本マイクログラビティ応用学会第28回学術講演会
  • Place of Presentation: イーグレ姫路（兵庫県姫路市）
  • Year and Date: 2014-11-26 – 2014-11-28
• [Presentation] Simulating Flame-spread Behavior of Randomly Distributed Droplet Clouds Based on Percolation Theory and Microgravity Experiment of Droplet Array (2014)
  • Author(s): Herman SAPUTRO, Yuki TSUCHIDA, Hiroshi OYAGI, Takehiko SEO, Masato MIKAMI
  • Organizer: 35th Internal Symposium on Combustion, WIPP
  • Place of Presentation: Hyatt Regency Embarcadero, San Francisco, USA
  • Year and Date: 2014-08-03 – 2014-08-08
• [Presentation] 低圧微小重力場における燃料液滴列の燃え広がり特性の調査 (2014)
  • Author(s): 佐野成太，渡利英貴，瀬尾健彦，三上真人
  • Organizer: 日本機械学会中国四国学生会第44回学生員卒業研究発表講演会
  • Place of Presentation: 鳥取大学（鳥取市）
• [Presentation] Experimental Study on Flame Spread of Droplet-cloud Elements with Two-droplet Interaction in Microgravity (2013)
  • Author(s): Mikami, M., Hirose, T., Watari, H., Seo, T., Moriue, O., Kikuchi, M.
  • Organizer: The 25th European Conference on Liquid Atomization and Spray Systems (ILASS-Europe 2013)
  • Place of Presentation: Chania, Greece
• [Presentation] TFP法を用いた燃料液滴群要素の燃え広がり特性の実験的調査 (2013)
  • Author(s): 渡利英貴，廣瀬勉，瀬尾健彦，三上真人
  • Organizer: 熱工学コンファレンス2013
  • Place of Presentation: 弘前大学（弘前市）
• [Presentation] Study of Flame Spread Behaviour in Large-scale 2-D Droplet Clouds Without Interactive Effect Using Percolation Approach (2013)
  • Author(s): Saputro, H., Seo, T., Mikami, M.
  • Organizer: 24th International Symposium on Transport Phenomena (ISTP-24)
  • Place of Presentation: 山口東京理科大学（山陽小野田市）
• [Presentation] A Ground-based Research for Fuel Droplet Cloud Combustion Experiment “Group Combustion” on KIBO/ISS (2013)
  • Author(s): Mikami, M., Seo, T., Nomura, H., Moriue, O., Kikuchi, M., Dietrich, D.L.
  • Organizer: 5th International Symposium for Physical Sciences in Space (ISPS2013)
  • Place of Presentation: Orlando, USA
• [Presentation] パーコレーションモデルを用いた二次元液滴群の燃え広がり特性に関する検討 (2013)
  • Author(s): 瀬尾健彦，H. Saputro，三上真人，菊池政雄
  • Organizer: 日本マイクログラビティ応用学会第27回学術講演会（JASMAC-27）
  • Place of Presentation: 芝浦工業大学（東京都江東区）
• [Presentation] 微小重力場における二液滴干渉燃焼が局所燃え広がり限界距離とその方向依存性に及ぼす影響 (2012)
  • Author(s): 廣瀬 勉, 渡利英貴, 瀬尾健彦, 三上真人
  • Organizer: 日本機械学会西日本エンジンシステム研究会夏季セミナー
  • Place of Presentation: 鳥取県立大山青年の冢(鳥取県西伯郡)
  • Year and Date: 2012-09-15
• [Presentation] DEPENDENCE OF FLAME-SPREAD-LIMIT DISTANCE FROM INTERACTIVELY BURNING N-DECANE DROPLETS ON FLAME-SPREAD WRECTION IN MICROGRAVITY (2012)
  • Author(s): Tsutomu Hirose, Hidetaka Watari, Takehiko Seo, Masato
  • Organizer: 34th International Symposium on Combustion
  • Place of Presentation: ワルシャワ(ポーランド)
  • Year and Date: 2012-07-31