SC2-1: Ignition Characteristic of Wall-impingement Diesel Sprays interacted with Each Other(SC: Spray and Spray Combustion,General Session Papers)

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Ignition characteristic of wall impingement two diesel sprays which were interacted with each other were investigated experimentally. Moreover, the measured results were compared with those obtained in a single spray case. Appearance positions of OH and C_2 radical luminosities, and luminous flame kernel were stereoscopically observed using a two-way fiber optical system. The impingement wall was placed in a pressure chamber. Parallel two sprays were simultaneously injected with two nozzles. A separate distance between two sprays was 35mm. Impingement distance from nozzle tip to the wall was fixed at 30mm. These sprays were interacted with each other after wall impingement. As the result, the delay for luminous flame appearance in parallel impingement sprays became shorter than that in the single impingement spray when the ambient temperature was relatively low (under 700K). In the case of parallel impingement sprays, appearance positions of OH and C_2 radical luminosities and luminous flame kernel appeared in a spray bulge formed between two sprays.
2008-07-28