Large Eddy Simulation of an ethanol spray flame under MILD combustion with the stochastic fields method
File(s)
Accepted version
Author(s)
Gallot-Lavallee, S
Jones, WP
Marquis, AJ
Type
Journal Article
Abstract
A combustion device operating in Moderate or Intense Low-oxygen Dilution (MILD) condition is numerically simulated. The burner consists of a cylindrical hot co-flow generator with an injector installed on the central axis. The hot co-flow is obtained by the lean combustion of Dutch Natural Gas (DNG). The spray is injected through an industrial pressure swirl atomiser using liquid ethanol as fuel. MILD combustion consists in burning the fuel in a high temperature environment so that the temperature gradients are limited and the production of pollutants such as NOx reduced. MILD combustion has been investigated for furnace applications and for various gaseous fuels, recently it has also been explored for spray combustion. The simulation is performed in the context of Large Eddy Simulation (LES) and the transported pdf equation for the scalars is solved using the stochastic fields approach. The validation of the results is based on the comparison with experimental data. The characteristics of the injector are obtained a posteriori by the use of the measurements at downstream location. The simulation correctly reproduces the velocity profiles of the particles within their size classes and the integral particle size distribution which is represented by the Sauter Mean Diameter (SMD). The gas phase temperature and velocity are also in good agreement with the measurements, however, some discrepancies are observed, presumably because of the lack of modelling of primary atomisation. The model employed appears to reliably reproduce the behaviour of the spray combustion system under MILD conditions.
Date Issued
2016-06-20
Date Acceptance
2016-06-02
Citation
Proceedings of the Combustion Institute, 2016, 36 (2), pp.2577-2584
ISSN
1540-7489
Publisher
Elsevier
Start Page
2577
End Page
2584
Journal / Book Title
Proceedings of the Combustion Institute
Volume
36
Issue
2
Copyright Statement
© 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
ALSTOM (Switzerland) Ltd
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000397458900105&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
4500697255
Subjects
Science & Technology
Physical Sciences
Technology
Thermodynamics
Energy & Fuels
Engineering, Chemical
Engineering, Mechanical
Engineering
Large Eddy Simulation
Stochastic fields method
MILD combustion
Ethanol
Spray combustion
PROBABILITY DENSITY-FUNCTION
HOT-DILUTED COFLOW
NUMERICAL-SIMULATION
SCALAR
Publication Status
Published
Date Publish Online
2016-06-20