Studies of laminar opposed-flow diffusion flames of acetylene at low-pressures with photoionization mass spectrometry

被引：14
|
作者：
Skeen, S. A. [1 ]
Yang, B. [2 ]
Michelsen, H. A. [1 ]
Miller, J. A. [3 ]
Violi, A. [4 ]
Hansen, N. [1 ]
机构：
[1] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA
[2] Princeton Univ, Combust Energy Frontier Res Ctr, Princeton, NJ 08540 USA
[3] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
[4] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA
来源：
PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2013年 / 34卷
关键词：
Non-premixed opposed-flow flames; Flame-sampling molecular-beam mass spectrometry; Acetylene combustion chemistry; Low-pressure combustion; RESONANCE-STABILIZED RADICALS; CROSS-SECTIONS; COMBUSTION CHEMISTRY; BENZENE FORMATION; HYDROCARBONS; EXTINCTION; PROPANE;
D O I：
10.1016/j.proci.2012.06.075
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
We have designed an opposed-flow flame system to investigate the chemical composition of non-premixed flames using in situ flame-sampling molecular-beam mass spectrometry with synchrotron-generated tunable vacuum-ultraviolet light as an ionization source. This paper provides details of the experimental apparatus, sampling method, and data-reduction procedures. To test the system, we have investigated the chemical composition of three low-pressure (30-50 Torr), non-premixed, opposed-flow acetylene(Ar)/O-2(Ar) flames. We measured quantitative mole-fraction profiles as a function of the distance from the fuel outlet for the major species and several intermediates, including the methyl and propargyl radicals. We determined the temperature profiles of these flames by normalizing a sampling-instrument function to thermocouple measurements near the fuel outlet. A comparison of the experimental temperature and major species profiles with modeling results indicates that flame perturbations caused by the sampling probe are minimal. The observed agreement between experimental and modeled results, apparent for most combustion species, is similar to corresponding studies of premixed flames. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码：1067 / 1075
页数：9
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