5009 アセトンOH同時PLIF法による希薄予混合火炎での局所消炎構造の可視化(S50-2 乱流燃焼の実験と数値シミュレーション(2),S50 乱流燃焼の実験と数値シミュレーション)

Abstract

This paper describes the applicability of acetone-OH simultaneous PLIF approach (scheme) to the diagnostics of the near-extinction flame behavior. This scheme is recently developed by authors and showed qualitative and quantitative accuracy for the laminar flames. By means of one laser and one detector combination (i.e. the simplest PLIF set), this approach gives us three different quantities of the local flamelet ; such as flame curvature, flame thickness, relative OH fluorescence intensity in the laser sheet plane. Successive imaging of locally-quenched features in 2-D plane is achieved and frequent extinction is observed at convex toward burned side. Local curvature-OH correlation shows positive indicating the qualitative consistency with the previous works done by Chen & Bilger (2002) and Thevenin (2005). This fact ensures that the present scheme could have a potential to work on extinction flame imaging and could be powerful tools for controlling the actual combustor.