Cargando…

Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions

[Image: see text] This study applies experimental methods to investigate the partially premixed ignition characteristics of a bluff-body flameholder with a pilot stage. The ignition fuel–air ratio (FAR) under different igniter and inlet conditions is obtained, while the ignition process is recorded...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhang, Yuxuan, Zhang, Jinghua, He, Xiaomin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8697616/
https://www.ncbi.nlm.nih.gov/pubmed/34963979
http://dx.doi.org/10.1021/acsomega.1c05643
_version_ 1784620085250359296
author Zhang, Yuxuan
Zhang, Jinghua
He, Xiaomin
author_facet Zhang, Yuxuan
Zhang, Jinghua
He, Xiaomin
author_sort Zhang, Yuxuan
collection PubMed
description [Image: see text] This study applies experimental methods to investigate the partially premixed ignition characteristics of a bluff-body flameholder with a pilot stage. The ignition fuel–air ratio (FAR) under different igniter and inlet conditions is obtained, while the ignition process is recorded with a high-speed photography device. Numerical simulations are carried out to investigate the relationship between the flow field, fuel distribution, and ignition process. The results show that a higher total capacitance energy storage of the igniter, inlet Mach number, or total pressure inside the combustion chamber will help increase the ignition performance, accelerate the development of the flame, and shorten the ignition delay. The flame propagation routine of the flameholder is controlled by several pairs of symmetrical recirculation zones behind the flameholder structure and the specific uneven fuel distribution caused by the flow field. This study provides a detailed understanding of the ignition process for the bluff-body flameholder.
format Online
Article
Text
id pubmed-8697616
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-86976162021-12-27 Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions Zhang, Yuxuan Zhang, Jinghua He, Xiaomin ACS Omega [Image: see text] This study applies experimental methods to investigate the partially premixed ignition characteristics of a bluff-body flameholder with a pilot stage. The ignition fuel–air ratio (FAR) under different igniter and inlet conditions is obtained, while the ignition process is recorded with a high-speed photography device. Numerical simulations are carried out to investigate the relationship between the flow field, fuel distribution, and ignition process. The results show that a higher total capacitance energy storage of the igniter, inlet Mach number, or total pressure inside the combustion chamber will help increase the ignition performance, accelerate the development of the flame, and shorten the ignition delay. The flame propagation routine of the flameholder is controlled by several pairs of symmetrical recirculation zones behind the flameholder structure and the specific uneven fuel distribution caused by the flow field. This study provides a detailed understanding of the ignition process for the bluff-body flameholder. American Chemical Society 2021-12-07 /pmc/articles/PMC8697616/ /pubmed/34963979 http://dx.doi.org/10.1021/acsomega.1c05643 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Zhang, Yuxuan
Zhang, Jinghua
He, Xiaomin
Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title_full Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title_fullStr Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title_full_unstemmed Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title_short Partially Premixed Ignition for a Bluff-Body Flameholder under Various Igniter and Inlet Conditions
title_sort partially premixed ignition for a bluff-body flameholder under various igniter and inlet conditions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8697616/
https://www.ncbi.nlm.nih.gov/pubmed/34963979
http://dx.doi.org/10.1021/acsomega.1c05643
work_keys_str_mv AT zhangyuxuan partiallypremixedignitionforabluffbodyflameholderundervariousigniterandinletconditions
AT zhangjinghua partiallypremixedignitionforabluffbodyflameholderundervariousigniterandinletconditions
AT hexiaomin partiallypremixedignitionforabluffbodyflameholderundervariousigniterandinletconditions