ディーゼル燃焼火炎中のCNバンドスペクトルとディーゼル排ガス中のNO_x生成の関係

概要

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We inserted an optical fiber into the combustion chamber of a DI engine and investigated the diesel flame spectra. The engine, with a water spray device attached in the intake pipe, was operated under various ignition timings, and the relationships among the intensity of CN band spectra, NO_x concentration in the diesel exhaust and the flame temperature were investigated. As a result, a correlation was found between CN band spectra and NO_x concentration. From this correlation, we confirmed that the diesel exhaust contains not only NO_x generated by the "Zeldvich mechanism", but also "prompt NO_x". We also confirmed that to reduce "prompt NOx", it is not effective to retard the ignition, but it is effective to spray water into the combustion chamber in high-load operations.
一般社団法人日本機械学会の論文
1995-06-25