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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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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 |
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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 |
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