Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation

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 mounte...

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Autores principales:	Elna J. K. Nilsson, Tomas Hurtig, Andreas Ehn, Christer Fureby
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	pulsed microwave electric field heat flux method plasma assisted combustion laminar burning velocity Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/089d1e9f71294a49b91df0b8f428687f
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spelling	oai:doaj.org-article:089d1e9f71294a49b91df0b8f428687f2021-11-25T18:52:01ZLaminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation10.3390/pr91120762227-9717https://doaj.org/article/089d1e9f71294a49b91df0b8f428687f2021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2076https://doaj.org/toc/2227-9717Laminar 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.Elna J. K. NilssonTomas HurtigAndreas EhnChrister FurebyMDPI AGarticlepulsed microwaveelectric fieldheat flux methodplasma assisted combustionlaminar burning velocityChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2076, p 2076 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	pulsed microwave electric field heat flux method plasma assisted combustion laminar burning velocity Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	pulsed microwave electric field heat flux method plasma assisted combustion laminar burning velocity Chemical technology TP1-1185 Chemistry QD1-999 Elna J. K. Nilsson Tomas Hurtig Andreas Ehn Christer Fureby Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
description	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.
format	article
author	Elna J. K. Nilsson Tomas Hurtig Andreas Ehn Christer Fureby
author_facet	Elna J. K. Nilsson Tomas Hurtig Andreas Ehn Christer Fureby
author_sort	Elna J. K. Nilsson
title	Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
title_short	Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
title_full	Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
title_fullStr	Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
title_full_unstemmed	Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation
title_sort	laminar burning velocity of lean methane/air flames under pulsed microwave irradiation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/089d1e9f71294a49b91df0b8f428687f
work_keys_str_mv	AT elnajknilsson laminarburningvelocityofleanmethaneairflamesunderpulsedmicrowaveirradiation AT tomashurtig laminarburningvelocityofleanmethaneairflamesunderpulsedmicrowaveirradiation AT andreasehn laminarburningvelocityofleanmethaneairflamesunderpulsedmicrowaveirradiation AT christerfureby laminarburningvelocityofleanmethaneairflamesunderpulsedmicrowaveirradiation
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Laminar Burning Velocity of Lean Methane/Air Flames under Pulsed Microwave Irradiation

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