Interactions between soot and CH* in a laminar boundary layer type diffusion flame in microgravity

被引：32

作者：

Fuentes, A. ^{[1
]}

Legros, G. ^{[2
]}

Claverie, A. ^{[1
]}

Joulain, P. ^{[1
]}

Vantelon, J. -P. ^{[1
]}

Torero, J. L. ^{[3
]}

机构：

[1] Lab Combust & Deton, F-86961 Futuroscope, France

[2] Univ Paris 06, Mecan Phys Lab, F-78230 Saint Cyr Lecole, France

[3] Univ Edinburgh, Sch Elect Engn, Edinburgh EH9 3JN, Midlothian, Scotland

来源：

PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2007年 / 31卷

关键词：

soot; CH*; diffusion flame; laser-induced incandescence; microgravity;

D O I：

10.1016/j.proci.2006.08.031

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A three-dimensional laminar non-buoyant diffusion flame was studied with the objective of improving the understanding of the soot production. The flame originated from a porous ethylene burner discharging into a laminar boundary layer. Soot volume fractions were measured using Laser-Induced Incandescence (LII), and the spontaneous emission from CH* was determined using chemiluminescence. The main parameter varied was the oxidizer flow. CH* measurements allowed the identification of the reaction zone, while LII measurements permitted the tracking of soot. It was observed that soot volume fractions are inversely proportional to the global residence time. This is in contradiction to previous studies on axi-symmetric non-buoyant diffusion flames. The combined measurements allowed it to be established that the apparently contradictory behaviour can be explained by an analysis of the influence of the flow field on the ratio of soot production to oxidation. (c) 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：2685 / 2692

页数：8

共 25 条

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Absolute CH concentration measurements in low-pressure methane flames: Comparisons with model results [J].