Flame Image and Flame Structure of Turbulent Premixed Flames Using Simultaneous OH-HCHO PLIF Technique

• YAMAMOTO Kazuhiro

  Department of Mechanical Science and Engineering, Nagoya University

• OHNISHI Masahiro

  Department of Mechanical Science and Engineering, Nagoya University

• HAYASHI Naoki

  Department of Mechanical Science and Engineering, Nagoya University

• OZEKI Masahiro

  Department of Mechanical Science and Engineering, Nagoya University

• YAMASHITA Hiroshi

  Department of Mechanical Science and Engineering, Nagoya University

Bibliographic Information

Other Title

• ＯＨ‐ＨＣＨＯ同時ＰＬＩＦ法による乱流予混合火炎の可視化と火炎構造
• OH-HCHO同時PLIF法による乱流予混合火炎の可視化と火炎構造
• OH HCHO ドウジ PLIFホウ ニ ヨル ランリュウ ヨコンゴウ カエン ノ カシカ ト カエン コウゾウ

Abstract

In this study, using simultaneous OH-HCHO PLIF (Planar Laser-Induced Fluorescence) technique, we have obtained instantaneous two-dimensional flame images to investigate highly turbulent premixed combustion in a cyclone-jet combustor. On the phase diagram, conditions of U_m<15m/s for φ_m=0.75 and U_m<20m/s for φ_m=0.90 belong to the flamelet regime, and those of U_m>20m/s for φ_m=0.75 and U_m=30m/s for φ_m=0.90 belong to thin reaction zones regime.In combustion field, HCHO plays an important role at relatively earlier stage of reaction and there is HCHO region mostly in preheat zone at the temperature range of 400 K to 1 400 K. On the other hand, OH exists in reaction zone or burned gas. From simultaneous images of these two species, we have discussed the local flame structure, based on flame length and number of flame regions. When the exit velocity is increased, more cusps appear on the flame front, with larger flame length. Interestingly, it is observed that the flame front is disconnected in some images, corresponding to the local flame extinction.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 73 (733), 1943-1949, 2007

  The Japan Society of Mechanical Engineers

Keywords

• Premixed Combustion
• Flame
• Extinction
• Turbulent Flow
• PLIF

Details

• CRID: 1390001206262046976
• NII Article ID: 130004226188
• NII Article ID: 110006402887
• NII Book ID: AN00187441
• DOI: 10.1299/kikaib.73.1943
• ISSN: 18848346
• ISSN: 03875016
• HANDLE: 2237/9381
• NDL BIB ID: 8959186
• Web Site: https://nagoya.repo.nii.ac.jp/records/7674
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8959186
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/73/733/73_733_1943/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed