コロナ放電による炭化水素乱流拡散火炎のすす抑制に関する研究(熱工学,内燃機関,動力など)

概要

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The effects of DC or AC (14kHz) corona discharges, formed between the apexes of opposed needle electrodes, on the soot emission of a propane turbulent diffusion flame were investigated experimentally. The coronas were applied across the lower part of the flame, where soot inception occurs, or across the middle part of the flame where both agglomeration and oxidation of carbon particles proceed. On application at the lower part, with a gap width as the electrode apexes are located outside the reaction zone, a marked reduction in soot emission was observed in cases of both DC and AC corona discharges, suggesting that this reduction is not caused by entrainment or corona wind alone. The charged particles, added to the flame, are mostly produced in the vicinity of the apexes of electrodes where maximum field strength exists. As for the mechanisms of the soot reduction, the increased charged-particle density observed in the middle and upper part of the flame seems to play a role.
社団法人日本機械学会の論文
1997-07-25