Visualization of Normal/Inverse Diffusion Flame Behaviors Interacting with Vortex by Laser Imaging Techniques

• KOMIYAMA Masaharu

  Osaka University

• FUJIMURA Tomoya

  Nissan Motor Co., Ltd

• TAKAGI Toshimi

  Osaka Sangyo University

Bibliographic Information

Other Title

• レーザ応用画像計測を用いた渦と干渉する正／逆火炎の動的挙動の可視化

Abstract

Instantaneous and simultaneous measurements of two-dimensional temperature and OH-LIF profiles by combining Rayleigh scattering with laser induced fluorescence (LIF) were demonstrated in a nitrogen-diluted hydrogen (H2 30% + N2 70%) laminar normal diffusion flame interacting with a large-scale vortex by oscillating central fuel flow or in an inverse diffusion flame by oscillating central airflow. The results obtained are described as follows. (1) The width of the reaction zone decreases remarkably, and decreasing in flame temperature and OH-LIF is seen with increasing central airflow in an inverse diffusion flame. OH-LIF increases, and temperature does not change with increasing central fuel flow in a normal diffusion flame. (2) When a remarkably large velocity fluctuation is given to the central airflow in the inverse flame, thinning of temperature and reaction zone starts at the convex and circumferential part of the vortex, and flame extinction completely occurs at the tail part of the vortex and makes the pair of edge flames. The outside edge flame reignites and connects with the upstream reaction zone.

Journal

• Transactions of the Visualization Society of Japan

  Transactions of the Visualization Society of Japan 27 (11), 97-104, 2007

  The Visualization Society of Japan

Keywords

• Diffusion flame
• Laser imaging
• Vortex
• Flame extinction
• Reignition

Details

• CRID: 1390282680292526592
• NII Article ID: 130004955833
• DOI: 10.3154/tvsj.27.97
• ISSN: 13465260
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed