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Analysis of the Chemical Structure in a Nonpremixed H2/N2 Flame Using Large Eddy Simulation with Detailed Chemistry: 8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China

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Analysis of the Chemical Structure in a Nonpremixed H2/N2 Flame Using Large Eddy Simulation with Detailed Chemistry : 8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China. / Zhou, Xuejin; Jiang, Xi.

In: Energy Procedia, Vol. 105, 01.05.2017, p. 1948-1952.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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@article{cbd816fb1b8642449835530745aab82c,
title = "Analysis of the Chemical Structure in a Nonpremixed H2/N2 Flame Using Large Eddy Simulation with Detailed Chemistry: 8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China",
abstract = "Abstract This paper presents numerical studies of flame structure in a well-known nonpremixed H2/N2 jet flame. A detailed kinetic mechanism is implemented to large eddy simulation approach with linear eddy model as subgrid closure method. The numerical techniques are validated against experimental data in temperature profiles, specie mass fractions and mixture fractions. Reaction rates are calculated at the flame base to investigate the dominant chemistry for a variety of conditions of fuel and coflow. The results show that the decrease of hydrogen concentration leads to chemical pathways changing at the flame base that is responsible for the autoignition. Oxygen content variation in the coflow affects the reaction rates but does not change the dominant chemistry. Furthermore, water addition to the coflow is found to enhance NOx formation by promoting radical production.",
keywords = "chemical structure, hydrogen flame, large eddy simulation, detailed kinetic mechanism, linear eddy model",
author = "Xuejin Zhou and Xi Jiang",
year = "2017",
month = may,
day = "1",
doi = "10.1016/j.egypro.2017.03.565",
language = "English",
volume = "105",
pages = "1948--1952",
journal = "Energy Procedia",
issn = "1876-6102",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Analysis of the Chemical Structure in a Nonpremixed H2/N2 Flame Using Large Eddy Simulation with Detailed Chemistry

T2 - 8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China

AU - Zhou, Xuejin

AU - Jiang, Xi

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Abstract This paper presents numerical studies of flame structure in a well-known nonpremixed H2/N2 jet flame. A detailed kinetic mechanism is implemented to large eddy simulation approach with linear eddy model as subgrid closure method. The numerical techniques are validated against experimental data in temperature profiles, specie mass fractions and mixture fractions. Reaction rates are calculated at the flame base to investigate the dominant chemistry for a variety of conditions of fuel and coflow. The results show that the decrease of hydrogen concentration leads to chemical pathways changing at the flame base that is responsible for the autoignition. Oxygen content variation in the coflow affects the reaction rates but does not change the dominant chemistry. Furthermore, water addition to the coflow is found to enhance NOx formation by promoting radical production.

AB - Abstract This paper presents numerical studies of flame structure in a well-known nonpremixed H2/N2 jet flame. A detailed kinetic mechanism is implemented to large eddy simulation approach with linear eddy model as subgrid closure method. The numerical techniques are validated against experimental data in temperature profiles, specie mass fractions and mixture fractions. Reaction rates are calculated at the flame base to investigate the dominant chemistry for a variety of conditions of fuel and coflow. The results show that the decrease of hydrogen concentration leads to chemical pathways changing at the flame base that is responsible for the autoignition. Oxygen content variation in the coflow affects the reaction rates but does not change the dominant chemistry. Furthermore, water addition to the coflow is found to enhance NOx formation by promoting radical production.

KW - chemical structure

KW - hydrogen flame

KW - large eddy simulation

KW - detailed kinetic mechanism

KW - linear eddy model

U2 - 10.1016/j.egypro.2017.03.565

DO - 10.1016/j.egypro.2017.03.565

M3 - Journal article

VL - 105

SP - 1948

EP - 1952

JO - Energy Procedia

JF - Energy Procedia

SN - 1876-6102

ER -