Investigation on Interference Mechanisms on Turbulent Lean Flame and Walls during Charge Compression Ignition Process

• Project/Area Number: 16K18025
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Thermal engineering
• Research Institution: Tokai University (2017-2018); Tokyo University of Science (2016)
• Principal Investigator: Fukushima Naoya 東海大学, 工学部, 特任講師 (80585240)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 乱流燃焼 / HCCIエンジン / 直接数値計算 / 自着火燃焼特性 / 火炎と壁面の干渉 / エネルギー効率化 / 予混合火炎

Outline of Final Research Achievements

To resolve environmental issues, it is expected that high-efficiency and low-emission combustion technology of homogeneous-charge compression ignition will be achieved. The objectives in this study is to reveal characteristics of auto-ignited turbulent combustion during compression and expansion processes and to investigate interference mechanisms on turbulent lean flame and walls. We have optimized direct-numerical-simulation (DNS) codes of turbulent combustion to a GPU cloud computer (a supercomputer with GPUs) and conducted DNS of auto-ignited turbulent combustion during compression and expansion processes to reveal interference mechanisms on turbulent lean flame and walls.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた圧縮自着火乱流燃焼特性及び希薄火炎と壁面の干渉機構に関する知見は様々な種類の高効率・低環境負荷型燃焼器の開発に利用可能であり，環境・エネルギー問題の解決に大きく貢献できると考えられる．また， GPUクラウドへの最適化プログラミング技法は熱流体，燃焼，材料力学等の幅広い工学分野でのCAE (Computer Aided Engineering)などへの応用が期待できる．

Research Products

• [Journal Article] DNS investigation on anisotropy and inhomogeneity of Reynolds stress in rhombic ducts (2018)
  • Author(s): Naoya Fukushima
  • Journal Title: Bulletin of 71st Annual Meeting of the APS Division of Fluid Dynamics Volume: -
  • Peer Reviewed
• [Journal Article] GS-SGS Energy Transfer Characteristics in a Turbulent Channel Flow (2017)
  • Author(s): Mizuki Kihara, Naoya Fukushima, Yuki Minamoto, Masayasu Shimura, Mamoru Tanahashi
  • Journal Title: Proc. 16th European Turbulence Conference Volume: -
  • Peer Reviewed
• [Journal Article] Evaluations of SGS Combustion, Scalar Flux and Stress Models in a Turbulent Jet Premixed Flame (2016)
  • Author(s): Katsuhiro Hiraoka, Yoshitsugu Naka, Masayasu Shimura, Yuki Minamoto, Naoya Fukushima, Mamoru Tanahashi, Toshio Miyauchi
  • Journal Title: Flow Turbulence and Combustion Volume: 97 Issue: 4 Pages: 1147-1164
  • DOI: 10.1007/s10494-016-9756-z
  • Peer Reviewed
• [Journal Article] A Fractal Dynamic SGS Combustion Model for Large Eddy Simulation of Turbulent Premixed Flames (2016)
  • Author(s): Katsuhiro Hiraoka, Yuki Minamoto, Masayasu Shimura, Yoshitsugu Naka, Naoya Fukushima, Mamoru Tanahashi
  • Journal Title: Combustion Science and Technology Volume: 188 Issue: 9 Pages: 1472-1495
  • DOI: 10.1080/00102202.2016.1195820
  • Peer Reviewed
• [Journal Article] 乱流予混合火炎のlarge eddy simulationのための格子幅自己認識型SGS燃焼モデルの開発 (2016)
  • Author(s): 平岡 克大，志村 祐康，源 勇気，中 吉嗣，福島 直哉，店橋 護
  • Journal Title: 日本機械学会 熱工学コンファレンス2016 講演論文集 Volume: USB
  • NAID: 130007136534
• [Presentation] DNS investigation on anisotropy and inhomogeneity of Reynolds stress in rhombic ducts (2018)
  • Author(s): Naoya Fukushima
  • Organizer: 71st Annual Meeting of the APS Division of Fluid Dynamics
  • Int'l Joint Research
• [Presentation] GS-SGS Energy Transfer Characteristics in a Turbulent Channel Flow (2017)
  • Author(s): Mizuki Kihara, Naoya Fukushima, Yuki Minamoto, Masayasu Shimura, Mamoru Tanahashi
  • Organizer: 16th European Turbulence Conference
• [Presentation] 乱流の階層構造に基づく格子幅自己認識型SGS応力モデル (2017)
  • Author(s): 福島直哉
  • Organizer: 第67回オープンCAE勉強会
  • Invited
• [Presentation] 乱流予混合火炎のlarge eddy simulationのための格子幅自己認識型SGS燃焼モデルの開発 (2016)
  • Author(s): 平岡 克大，志村 祐康，源 勇気，中 吉嗣，福島 直哉，店橋 護
  • Organizer: 日本機械学会 熱工学コンファレンス2016
  • Place of Presentation: 愛媛県松山市
  • Year and Date: 2016-10-22