Understanding of auto-ignition mechanism and soot formation of unburned premixed mixture under micro-scale

• Project/Area Number: 20560194
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Okayama University
• Principal Investigator: KAWAHARA Nobuyuki Okayama University, 大学院・自然科学研究科, 准教授 (30314652)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 省エネルギー / 熱機関 / 着火 / スス生成 / エネルギー効率化 / 火花点火機関 / ノッキング / 水素燃料 / 圧力波 / ノッキング強度 / 予混合圧縮自着火

Research Abstract

The purpose of this study is to investigate auto-ignition mechanism and soot formation of unburned mixture compressed by propagating flame. Compression-expansion machine were used. I investigated as follows ; (1) auto-ignition of unburned mixture of hydrogen compressed by propagating flame were visualized, (2) soot formation under low-temperature chemistry, effect of fuel component on soot formation, soot formation during premixed charge compression ignition, soot formation near wall due to pressure wave, were investigated in order to understand luminous flame during engine knocking.

Research Products

• [Journal Article] Visualization of Knocking Combustion in a Hydrogen Spark-Ignition Engine, 18th World Hydrogen Energy Conference 2010 - WHEC2010 Proceedings (2010)
  • Author(s): Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita
  • Journal Title: Parallel Sessions Book 6 : - Stationary Applications -Transportation Applications vol.78-6 Pages: 141-148
  • Peer Reviewed
• [Journal Article] Visualization of Knocking Combustion in a Hydrogen Spark-Ignition Engine (2010)
  • Author(s): Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita
  • Journal Title: 18th World Hydrogen Energy Conference 2010 WHEC2010 Proceedings, Parallel Sessions Book 6 : Stationary Applications-Transportation Applications Volume: 78-6 Pages: 141-148
  • Peer Reviewed
• [Journal Article] Visualization of Auto-ignition and Pressure Wave during Knocking in a Hydrogen Spark-Ignition Engine (2009)
  • Author(s): Kawahara, N., Tomita, E.
  • Journal Title: International Journal of Hydrogen Energy vol.34 Pages: 3156-3163
  • Peer Reviewed
• [Journal Article] Visualization of Auto-ignition and Pressure Wave during Knocking in a Hydrogen Spark-Ignition Engine (2009)
  • Author(s): Kawahara, N., Tomita, E.
  • Journal Title: International Journal of Hydrogen Energy 34 Pages: 3156-3163
  • Peer Reviewed
• [Journal Article] Visualization of Knocking Combustion in a Hydrogen Spark-Ignition Engine (2008)
  • Author(s): Kawahara. N., Tomita, E., Yoshitomi, M.
  • Journal Title: Meeting the Challenges to Sustainable Mobility Pages: 3-9
  • Peer Reviewed
• [Presentation] In situ CO_2 Concentration Measurement inside a Combustion Chamber Using Infrared Laser Absorption Technique (2011)
  • Author(s): 河原伸幸, 冨田栄二
  • Organizer: 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
  • Place of Presentation: USA
  • Year and Date: 2011-01-06
• [Presentation] 火花点火機関におけるノッキング燃焼時のスス生成挙動の可視化 (2009)
  • Author(s): 河原伸幸, 冨田栄二, 吉永靖男
  • Organizer: 第20回内燃機関シンポジウム
  • Place of Presentation: 東京
  • Year and Date: 2009-09-03
• [Presentation] Visualization of Auto-Ignited Kernel and Propagation of Pressure Wave during Knocking Combustion in a Hydrogen Spark-Ignition Engine (2009)
  • Author(s): Nobuyuki Kawahara, Eiji Tomita, Mithun Kanti Roy
  • Organizer: SAE 2009 Powertrains, Fuels and Lubricants Meeting
  • Place of Presentation: イタリア
  • Year and Date: 2009-06-15
• [Presentation] Visualization of Auto-Ignited Kernel and Propagation of Pressure Wave during Knockinng Combustion in a Hydorogen Spark-Ignition Engine (2009)
  • Author(s): Nobuyuki Kawahara, Eiji Tomita, Mithun Kanti Roy
  • Organizer: SAE 2009 Powertrains, Fuels and Lubricants Meeting
  • Place of Presentation: イタリア
  • Year and Date: 2009-06-15
• [Presentation] ノッキング燃焼におけるスス生成過程の可視化 (2008)
  • Author(s): 河原伸幸, 冨田栄二, 吉永靖男
  • Organizer: 第46回燃焼シンポジウム
  • Place of Presentation: 京都
  • Year and Date: 2008-12-03
• [Presentation] Soot formation during knocking combustion in a spark-ignition engine (2008)
  • Author(s): Kawahara N., Tomita E., Masatsuki, H.
  • Organizer: Int.Symp.on Combustion
  • Place of Presentation: Canada
  • Year and Date: 2008-08-04
• [Presentation] Knock in a Hydrogen Spark-Ignition Engine (2008)
  • Author(s): Kawahara N., Tomita E., Yoshitomi, M.
  • Organizer: Int.Symp.on Combustion
  • Place of Presentation: Canada
  • Year and Date: 2008-08-04
• [Presentation] Knock in a Hydrogen Spark-Ignition Engine (2008)
  • Author(s): Kawahara, N., Tomita, E., Yoshitomi, M.
  • Organizer: Int. Symp. on Combustion
  • Place of Presentation: カナダ
  • Year and Date: 2008-08-04
• [Presentation] Soot formation during knocking combustion in a spark-ignition engine (2008)
  • Author(s): Kawahara, N., Tomita, E., Masatsuki, H.
  • Organizer: Int. Symp. on Combustion
  • Place of Presentation: カナダ
  • Year and Date: 2008-08-04