Soot particle size distributions in turbulent opposed jet flames with premixed propene-air reactants
File(s)
Published version
Author(s)
Shariatmadar, H
Lindstedt, RP
Type
Journal Article
Abstract
Emissions of soot are strongly dependent on turbulence-chemistry interactions due to the relatively slow formation and oxidation processes. Studies of laminar flames have shown that both flow conditions and the chemistry of the parent fuel have a significant impact on measured particle size distributions (PSDs). The current study determines the impact of flow on the development of PSDs in premixed turbulent flames through a variation in the total rate of strain using an opposed jet configuration with fractal grid generated turbulence. The impact of fuel chemistry is investigated under such conditions through the use of propene–air flames with results compared to the corresponding ethene–air flames quantified in earlier studies. Samples were extracted using a quartz probe featuring aerodynamic quenching and dual port dilution at the probe tip and in the transfer-line. Spatially resolved PSD data is obtained along the stagnation point streamline using a scanning mobility particle sizer equipped with nano- and long-DMA columns to show the evolution through the turbulent flame brush. Results confirm that PSDs of soot in premixed turbulent flames are exceptionally sensitive to both the chemistry of the parent fuel and the flow field. The reduced residence times in the current turbulent flows lead to maximum median and mean mobility diameters below 10 nm with higher rates of strain promoting unimodal PSD shapes. It is further shown that the chemistry of the parent fuel has a strong influence on PSDs with propene causing a two order of magnitude increase in smaller particles compared to the corresponding ethene flame.
Date Issued
2023
Date Acceptance
2022-07-24
Citation
Proceedings of the Combustion Institute, 2023, 39 (1), pp.1089-1097
ISSN
0082-0784
Publisher
Elsevier
Start Page
1089
End Page
1097
Journal / Book Title
Proceedings of the Combustion Institute
Volume
39
Issue
1
Copyright Statement
© 2022 The Authors. Published by Elsevier Inc. on behalf of The Combustion Institute. This is an open access
article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001020990500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
COMBUSTION
DENSITY
Energy & Fuels
Engineering
Engineering, Chemical
Engineering, Mechanical
ETHYLENE
Impact of fuel
Impact of rate of strain
MOBILITY SIZE
Particle size distributions
Physical Sciences
Premixed turbulent flames
QUANTIFICATION
Science & Technology
Soot
Technology
Thermodynamics
Publication Status
Published
Date Publish Online
2022-09-30