ID#: 87
Abstract Title: Effect of Nitrogen-Oxide Addition on Low-Temperature Powling-Burner Flames
Session Title: Chemistry in Flames I
Session Date: 7/31/01
Session Start Time: 11:20 AM
Contributing Author: Ohta, Y.
Organization: Nagoya Institute of Technology
Country: Japan
Authors: Masahiro Furutani, Yasuhiko Ohta, Yasushi Niimi, Masakazu Nose, Shizumo Fujikawa
Short Abstract: The burned gases is always introduced into / mixed with fresh mixtures in the reciprocating-piston internal combustion engine with / without exhaust-gas recirculation. The effect of burned gases contained in the mixtures is not weak on the preflame reactions prior to the hot-flame ignition. Temperature dependence became a quarter on the ignition induction time. It would be indicated that some nitrogen-related compound are closely take part in the ignition promotion/retardation phenomena. Flat low-temperature flames were established on a Powling burner using rich diethyl-ether/air mixtures. Nitrogen monoxide or nitrogen dioxide was added into the mixtures, and the temperature development, chemical-species history and emission spectra from the low-temperature flames were examined to elucidate the effects of nitrogen oxides on low-temperature oxidation of fuel/air mixtures in the most simple, undoubted system, and to find out ignition control procedures to realize premixed compression-ignition (HCCI) engines. Nitrogen-oxide addition retarded the cool-flame appearance and reduced the distance/time between cool and blue flames where the excited oxygen molecule could be found. Nitrogen oxides promote fuel decomposition reactions in the post cool-flame period which results in rapid blue-flame onsets, but the pre cool-flame reactions are emaciated. The knowledge would contain a key factor to find real ignition-control procedures for the novel internal combustion engine systems.