The Effect of Diluents on the Flame Structure and NO Generation Characteristics of H 2 /CO Micromixing Flames

Wentong Wang (), Dengke Chen, Wenkun Zhu and Rui Sun ()
Additional contact information
Wentong Wang: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Dengke Chen: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Wenkun Zhu: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Rui Sun: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China

Energies, 2023, vol. 16, issue 3, 1-14

Abstract: This paper uses numerical simulation to investigate the effects of diluents on the flame structure and NO generation of H 2 /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 H 2 O is added. When the diluents are CO 2 and H 2 O, 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 CO 2 diluent highly weakens the sensitivity.

Keywords: diluents; flame structure; NO generation characteristics; micromixing combustion; H 2 /CO mixed fuel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/3/1252/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/3/1252/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:3:p:1252-:d:1045363

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().