低硫黄燃料油の芳香族分が燃焼中のすすの生成・酸化に及ぼす影響 - ラジカル自発光時間計測を併用したすすの評価方法の検討

抄録

  The IMO sulphur limit for ships' fuel oils has just started since 2020. In order to reduce sulphur concentration, it is predicted that LCO (Light Cycle Oil) fuels will be more commonly used as low sulphur base materials. However, aromatics in LCO fuel affect not only self-ignition but also combustion characteristics, especially soot emission. Therefore, it is important to evaluate combustion characteristics of aromatics in a simplified manner.

  In this study, the authors measured temporal and spatial C₂ and OH radical luminous distributions, which contribute to soot formation and oxidation process respectively, to evaluate combustion and soot emission characteristics of aromatic contents. Then the authors proposed a new method for soot estimation using luminous intensity and time of C₂ and OH radicals. The results of the study showed that the soot estimation mostly corresponded to soot emission experimental data.