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Effect of a single nanosecond pulsed discharge on a flat methane–air flame

Bao, Yupan LU ; Kong, Chengdong LU ; Ravelid, Jonas LU ; Sun, Jinguo LU orcid ; Nilsson, Sebastian LU ; Kristensson, Elias LU and Ehn, Andreas LU (2023) In Applications in Energy and Combustion Science 16.
Abstract

Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plasma-assisted lifted flat methane–air flame by a nanosecond pulsed discharge at atmospheric pressure. The nanosecond pulsed discharge, with a pulse duration of 4 ns and an amplitude of 30 kV to 50 kV, is used to stimulate the flame with a repetition rate of 1 Hz. The flame/plasma interactions are investigated with electrical and optical/laser diagnostics to study plasma-formation and its effect on the temperatures and formaldehyde formation.... (More)

Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plasma-assisted lifted flat methane–air flame by a nanosecond pulsed discharge at atmospheric pressure. The nanosecond pulsed discharge, with a pulse duration of 4 ns and an amplitude of 30 kV to 50 kV, is used to stimulate the flame with a repetition rate of 1 Hz. The flame/plasma interactions are investigated with electrical and optical/laser diagnostics to study plasma-formation and its effect on the temperatures and formaldehyde formation. The flame speed seems to be accelerated for tens of milliseconds after the plasma stimulation, without noticeable gas temperature increase at the flame front and in the post-flame region. Formaldehyde is formed in the unburnt region while there is a slight increase in formaldehyde signal in the preheat zone. These results show that a volumetric effect of plasma-assisted combustion can be achieved with a short nanosecond plasma from a single excitation.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Atmospheric pressure plasma, Flat flame, Laser diagnostics, Nanosecond discharge, Non-thermal plasma, Plasma-assisted combustion
in
Applications in Energy and Combustion Science
volume
16
article number
100198
publisher
Elsevier
external identifiers
  • scopus:85171170549
ISSN
2666-352X
DOI
10.1016/j.jaecs.2023.100198
language
English
LU publication?
yes
additional info
Funding Information: This research was funded by the Swedish Research Council ( 2021-04506 ), the Swedish Energy Agency, Sweden ( 389131 ), Knut & Alice Wallenberg Foundation, Sweden ( 2019.0084 ), the Royal Physiographic Society of Lund and the European Research Council ( 852394 & 803634 ). Publisher Copyright: © 2023 The Author(s)
id
a36ddf95-976b-432c-b08a-d695aa7d85b0
date added to LUP
2023-09-28 09:49:01
date last changed
2023-12-04 14:56:12
@article{a36ddf95-976b-432c-b08a-d695aa7d85b0,
  abstract     = {{<p>Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plasma-assisted lifted flat methane–air flame by a nanosecond pulsed discharge at atmospheric pressure. The nanosecond pulsed discharge, with a pulse duration of 4 ns and an amplitude of 30 kV to 50 kV, is used to stimulate the flame with a repetition rate of 1 Hz. The flame/plasma interactions are investigated with electrical and optical/laser diagnostics to study plasma-formation and its effect on the temperatures and formaldehyde formation. The flame speed seems to be accelerated for tens of milliseconds after the plasma stimulation, without noticeable gas temperature increase at the flame front and in the post-flame region. Formaldehyde is formed in the unburnt region while there is a slight increase in formaldehyde signal in the preheat zone. These results show that a volumetric effect of plasma-assisted combustion can be achieved with a short nanosecond plasma from a single excitation.</p>}},
  author       = {{Bao, Yupan and Kong, Chengdong and Ravelid, Jonas and Sun, Jinguo and Nilsson, Sebastian and Kristensson, Elias and Ehn, Andreas}},
  issn         = {{2666-352X}},
  keywords     = {{Atmospheric pressure plasma; Flat flame; Laser diagnostics; Nanosecond discharge; Non-thermal plasma; Plasma-assisted combustion}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Applications in Energy and Combustion Science}},
  title        = {{Effect of a single nanosecond pulsed discharge on a flat methane–air flame}},
  url          = {{http://dx.doi.org/10.1016/j.jaecs.2023.100198}},
  doi          = {{10.1016/j.jaecs.2023.100198}},
  volume       = {{16}},
  year         = {{2023}},
}