The Effect of Diluents on the Flame Structure and NO Generation Characteristics of H2/CO Micromixing Flames

Wentong Wang; Dengke Chen; Wenkun Zhu; Rui Sun

doi:10.3390/en16031252

The Effect of Diluents on the Flame Structure and NO Generation Characteristics of H₂/CO Micromixing Flames

Wentong Wang^*
, Dengke Chen
, Wenkun Zhu
, Rui Sun^*

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

This paper uses numerical simulation to investigate the effects of diluents on the flame structure and NO generation of H₂/CO micromixing flames. The results show that under the same thermal power condition, the diluents reduce the flame temperature and decrease the combustion reaction rate and flame propagation velocity. In addition, the diluents downsize the flame and force it downstream. With an increase in the diluent fraction, these trends are amplified. The NO production decreases due to the diluents, and the NO is lowest when H₂O is added. When the diluents are CO₂ and H₂O, the NO generation is dominated by the reactants’ concentration. This results in the lowest temperature not corresponding to the lowest NO production. The diluents also reduce the sensitivity of the NO production to the temperature, and the CO₂ diluent highly weakens the sensitivity.

Original language	English
Article number	1252
Journal	Energies
Volume	16
Issue number	3
DOIs	https://doi.org/10.3390/en16031252
State	Published - Feb 2023
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

H/CO mixed fuel
NO generation characteristics
diluents
flame structure
micromixing combustion

Access to Document

10.3390/en16031252

Cite this

@article{28e3ffbdb63549a3abc79a0698469627,

title = "The Effect of Diluents on the Flame Structure and NO Generation Characteristics of H2/CO Micromixing Flames",

abstract = "This paper uses numerical simulation to investigate the effects of diluents on the flame structure and NO generation of H2/CO micromixing flames. The results show that under the same thermal power condition, the diluents reduce the flame temperature and decrease the combustion reaction rate and flame propagation velocity. In addition, the diluents downsize the flame and force it downstream. With an increase in the diluent fraction, these trends are amplified. The NO production decreases due to the diluents, and the NO is lowest when H2O is added. When the diluents are CO2 and H2O, the NO generation is dominated by the reactants{\textquoteright} concentration. This results in the lowest temperature not corresponding to the lowest NO production. The diluents also reduce the sensitivity of the NO production to the temperature, and the CO2 diluent highly weakens the sensitivity.",

keywords = "H/CO mixed fuel, NO generation characteristics, diluents, flame structure, micromixing combustion",

author = "Wentong Wang and Dengke Chen and Wenkun Zhu and Rui Sun",

note = "Publisher Copyright: {\textcopyright} 2023 by the authors.",

year = "2023",

month = feb,

doi = "10.3390/en16031252",

language = "英语",

volume = "16",

journal = "Energies",

issn = "1996-1073",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "3",

}

TY - JOUR

T1 - The Effect of Diluents on the Flame Structure and NO Generation Characteristics of H2/CO Micromixing Flames

AU - Wang, Wentong

AU - Chen, Dengke

AU - Zhu, Wenkun

AU - Sun, Rui

PY - 2023/2

Y1 - 2023/2

N2 - This paper uses numerical simulation to investigate the effects of diluents on the flame structure and NO generation of H2/CO micromixing flames. The results show that under the same thermal power condition, the diluents reduce the flame temperature and decrease the combustion reaction rate and flame propagation velocity. In addition, the diluents downsize the flame and force it downstream. With an increase in the diluent fraction, these trends are amplified. The NO production decreases due to the diluents, and the NO is lowest when H2O is added. When the diluents are CO2 and H2O, the NO generation is dominated by the reactants’ concentration. This results in the lowest temperature not corresponding to the lowest NO production. The diluents also reduce the sensitivity of the NO production to the temperature, and the CO2 diluent highly weakens the sensitivity.

AB - This paper uses numerical simulation to investigate the effects of diluents on the flame structure and NO generation of H2/CO micromixing flames. The results show that under the same thermal power condition, the diluents reduce the flame temperature and decrease the combustion reaction rate and flame propagation velocity. In addition, the diluents downsize the flame and force it downstream. With an increase in the diluent fraction, these trends are amplified. The NO production decreases due to the diluents, and the NO is lowest when H2O is added. When the diluents are CO2 and H2O, the NO generation is dominated by the reactants’ concentration. This results in the lowest temperature not corresponding to the lowest NO production. The diluents also reduce the sensitivity of the NO production to the temperature, and the CO2 diluent highly weakens the sensitivity.

KW - H/CO mixed fuel

KW - NO generation characteristics

KW - diluents

KW - flame structure

KW - micromixing combustion

UR - https://www.scopus.com/pages/publications/85147844993

U2 - 10.3390/en16031252

DO - 10.3390/en16031252

M3 - 文章

AN - SCOPUS:85147844993

SN - 1996-1073

VL - 16

JO - Energies

JF - Energies

IS - 3

M1 - 1252

ER -