2-D imaging of soot formation process in a transient spray flame by laser-induced fluorescence and incandescence techniques

Tetsuya Aizawa, H. Kosaka, Y. Matsui

Research output: Contribution to conferencePaper

Abstract

Simultaneous imaging of soot precursor and soot in a transient spray flame achieved in a rapid compression machine was conducted by laser-induced fluorescence (LIF) and incandescence (LII) methods to study soot formation process in a diesel spray flame. LIF from soot precursor was mainly located in the central region of the spray flame in between 35 and 55 mm from the nozzle orifice. LII from soot surrounded the soot precursor LIF region and extended downstream. First appearance of LIF from soot precursor in the spray flame preceded the appearance of LII from soot. The intensity of LIF from soot precursor reached its maximum immediately after the rich premixed combustion. In contrast, the intensity of LII from soot increased gradually and reached its maximum after the end of injection. Measured LIF spectrum of the soot precursor in the spray flame was very broad and showed no apparent spectral structure. Original is an abstract.

Original languageEnglish
Number of pages1
Publication statusPublished - 1 Dec 2002
Event29th International Symposium on Combustion - Sapporo, Japan
Duration: 21 Jul 200226 Jul 2002

Conference

Conference29th International Symposium on Combustion
CountryJapan
CitySapporo
Period21/07/0226/07/02

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    Aizawa, T., Kosaka, H., & Matsui, Y. (2002). 2-D imaging of soot formation process in a transient spray flame by laser-induced fluorescence and incandescence techniques. Paper presented at 29th International Symposium on Combustion, Sapporo, Japan.