乱流予混合火炎の燃焼診断に対するアセトン-OH同時PLIF計測手法の有効性の検討(熱工学,内燃機関,動力など)

概要

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This paper described an availability of acetone-OH simultaneous PLIF scheme for combustion diagnostics on turbulent premixed flame. Distinctive signal gap is found between acetone (seeded in the premixed gas) and OH (combustion product) with single excitation wavelength and single CCD camera to achieve relatively low cost measurement of flame zone. Flame zone thickness includes much flame information, e.g. the location of heat release region, local burning velocity. Considered turbulent condition throughout the present study is relatively weak and categorized in laminar flamelet regime. As the equivalence ratio of premixed mixture (acetone-seeded methane-air premixed gas) is varied from 0.64 to 0.90 (burning velocity is increased), measured local flame zone thickness (mode value) is decreased, however 3-D movement of the observed flame front makes the measured flame zone thickness wider than the laminar flame condition. In addition, results show that flame front curvature (convex toward unburned is positive) is positively correlated with flame zone thickness. It is ensured an applicability of the present scheme to survey the relation between flame zone thickness and flame front curvature in turbulent premixed flame.
社団法人日本機械学会の論文
2007-01-25