Turbulent combustion mechanism and emission characteristics of next-generation C4-biofuel isomers in a high-pressure and high-temperature environment

• Project/Area Number: 26289043
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Tohoku University
• Principal Investigator: KOBAYASHI Hideaki 東北大学, 流体科学研究所, 教授 (30170343)
• Co-Investigator(Kenkyū-buntansha): 早川 晃弘 東北大学, 流体科学研究所, 助教 (90709156)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000); Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2015: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2014: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
• Keywords: 高圧燃焼 / 乱流燃焼 / バイオ燃料 / 異性体燃料 / 排ガス特性

Outline of Final Research Achievements

To explore the turbulent combustion mechanism of next-generation C4-biofuel isomers in a high-pressure and high-temperature environment, OH-PLIF for n-Butanol and iso-Butanol flames has been performed at pressure up to 1.0 MPa. It was found that in the regime of low turbulent intensity, maximum flame surface density of n-Butanol flame is smaller than that of iso-Butanol flame, indicating an isomer effects of biofuels at high pressure related to local structure of Butanol flames. Simultaneous measurement of NO-PLIF and OH-PLIF has been also succeeded and agreement with numerical analysis in terms of strong diffusion of NO has been confirmed. For four kinds of isomer fuels of Butanol and Butane, measurement of CO and NO emissions has been performed. CO and NO emissions from Butanol flame is weak because of oxygen containing effects, while NO emission from n-Butane flame is strongest, the mechanism being investigated based on reaction path analysis using detail chemistry.

Research Products

• [Presentation] High-Pressure Turbulent Premixed Combustion of Biofuels (2015)
  • Author(s): H. Kobayashi, S. Kadowaki
  • Organizer: Proceedings of the 10th Asia-Pacific Conference on Combustion, Beijing, China
  • Place of Presentation: 中国（北京）
  • Year and Date: 2015-07-19
  • Int'l Joint Research / Invited
• [Presentation] 高圧環境におけるブタノール異性体の乱流燃焼特性に関する研究 (2015)
  • Author(s): 中島隼,内田朋洋,工藤琢,早川晃弘,門脇敏,小林秀昭
  • Organizer: 日本機械学会東北支部 第50期総会・講演
  • Place of Presentation: 東北大学工学研究科・工学部 機械系講義棟 宮城県・仙台市
  • Year and Date: 2015-03-13
• [Presentation] The Effects of Intermediate Product on the Intrinsic Instability of Premixed Flames with High Lewis Number Reactant (2014)
  • Author(s): S. Kadowaki, T. T. Aung, W. Yamazaki, H. Kobayashi
  • Organizer: Proceedings of the Fourteenth International Symposium on Advanced Fluid Information
  • Place of Presentation: 仙台国際センター 宮城県・仙台市
  • Year and Date: 2014-10-09
• [Presentation] Effects of Intermediate Species on Flame Instability in Turbulent Premixed Flames of Propanol Isomers at High Pressure (2014)
  • Author(s): S. Nakajima, T. Uchida, S. Soyoshi, T. Kudo, A. Hayakawa, S. Kadowaki, H. Kobayashi
  • Organizer: Eleventh International Conference on Flow Dynamics
  • Place of Presentation: 仙台国際センター 宮城県・仙台市
  • Year and Date: 2014-10-08
• [Presentation] On the Role of Intermediate Species in Turbulent Premixed Combustion of Propane and Prpanol Isomers at High Pressure (2014)
  • Author(s): T. Uchida, S. Souyoshi, S. Nakajima, T. T. Aung, T. Kudo, A. Hayakawa, H. Kobayashi
  • Organizer: 35th International Symposium on Combustion
  • Place of Presentation: サンフランシスコ アメリカ
  • Year and Date: 2014-08-08