Laminar burning velocity of lean methane/air flames under pulsed microwave irradiation
Nilsson, Elna J.K. LU
; Hurtig, Tomas
; Ehn, Andreas
LU
and Fureby, Christer
LU
(2021)
In Processes
9(11).
- Abstract
Laminar burning velocity of lean methane/air flames exposed to pulsed microwave irradiation is determined experimentally as part of an effort to accurately quantify the enhancement resulting from exposure of the flame to pulsed microwaves. The experimental setup consists of a heat flux burner mounted in a microwave cavity, where the microwave has an average power of up to 250 W at an E-field in the range of 350–380 kV/m. Laminar burning velocities for the investigated methane/air flames increase from 1.8 to 12.7% when exposed to microwaves. The magnitude of the enhancement is dependent on pulse sequence (duration and frequency) and the strength of the electric field. From the investigated pulse sequences, and at a constant E-field and... (More)
Laminar burning velocity of lean methane/air flames exposed to pulsed microwave irradiation is determined experimentally as part of an effort to accurately quantify the enhancement resulting from exposure of the flame to pulsed microwaves. The experimental setup consists of a heat flux burner mounted in a microwave cavity, where the microwave has an average power of up to 250 W at an E-field in the range of 350–380 kV/m. Laminar burning velocities for the investigated methane/air flames increase from 1.8 to 12.7% when exposed to microwaves. The magnitude of the enhancement is dependent on pulse sequence (duration and frequency) and the strength of the electric field. From the investigated pulse sequences, and at a constant E-field and average power, the largest effect on the flame is obtained for the longest pulse, namely 50 μs. The results presented in this work are, to the knowledge of the authors, the first direct determination of laminar burning velocity on a laminar stretch-free flame exposed to pulsed microwaves.
(Less)
- author
- Nilsson, Elna J.K.
LU
; Hurtig, Tomas
; Ehn, Andreas
LU
and Fureby, Christer
LU
- organization
- publishing date
- 2021-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electric field, Heat flux method, Laminar burning velocity, Plasma assisted combustion, Pulsed microwave
- in
- Processes
- volume
- 9
- issue
- 11
- article number
- 2076
- publisher
- MDPI AG
- external identifiers
-
- scopus:85119907082
- ISSN
- 2227-9717
- DOI
- 10.3390/pr9112076
- project
- Advanced Laser Diagnostics for Discharge Plasma
- language
- English
- LU publication?
- yes
- id
- c58d263b-2e7f-4793-bd58-2c02485c2863
- date added to LUP
- 2021-12-15 12:51:47
- date last changed
- 2022-10-17 19:46:07
@article{c58d263b-2e7f-4793-bd58-2c02485c2863,
abstract = {{<p>Laminar burning velocity of lean methane/air flames exposed to pulsed microwave irradiation is determined experimentally as part of an effort to accurately quantify the enhancement resulting from exposure of the flame to pulsed microwaves. The experimental setup consists of a heat flux burner mounted in a microwave cavity, where the microwave has an average power of up to 250 W at an E-field in the range of 350–380 kV/m. Laminar burning velocities for the investigated methane/air flames increase from 1.8 to 12.7% when exposed to microwaves. The magnitude of the enhancement is dependent on pulse sequence (duration and frequency) and the strength of the electric field. From the investigated pulse sequences, and at a constant E-field and average power, the largest effect on the flame is obtained for the longest pulse, namely 50 μs. The results presented in this work are, to the knowledge of the authors, the first direct determination of laminar burning velocity on a laminar stretch-free flame exposed to pulsed microwaves.</p>}},
author = {{Nilsson, Elna J.K. and Hurtig, Tomas and Ehn, Andreas and Fureby, Christer}},
issn = {{2227-9717}},
keywords = {{Electric field; Heat flux method; Laminar burning velocity; Plasma assisted combustion; Pulsed microwave}},
language = {{eng}},
number = {{11}},
publisher = {{MDPI AG}},
series = {{Processes}},
title = {{Laminar burning velocity of lean methane/air flames under pulsed microwave irradiation}},
url = {{http://dx.doi.org/10.3390/pr9112076}},
doi = {{10.3390/pr9112076}},
volume = {{9}},
year = {{2021}},
}