Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Classification and lift-off height prediction of non-premixed MILD and autoignitive flames
Author: Evans, M.
Medwell, P.
Wu, H.
Stagni, A.
Ihme, M.
Citation: Proceedings of the Combustion Institute, 2017; 36(3):4297-4304
Publisher: Elsevier
Issue Date: 2017
ISSN: 1540-7489
Statement of
M.J. Evans, P.R. Medwell, H. Wu, A. Stagni, M. Ihme
Abstract: A new non-premixed definition for moderate or intense low oxygen dilution (MILD) com- bustion based on an equivalent activation energy rather than prior assessment of a reference temperature was derived and proved to be consistent with previous experimental observations of gradual ignition. This new definition is a function of initial and final temperatures and the effective activation energy of an equivalent one-step chemical reaction which inherently agrees with the features of the premixed flamelet definition and provides insight to reconcile premixed and non-premixed classifications of MILD combustion. Time-averaged chemiluminescent images of a series of C2H4 flames showed that autoignitive flames exhibit peak temperatures at the flame-base in contrast to the gradual ignition predicted and observed in MILD jet flames. Transient flamelet modeling suggested that the shift in ignition location from regions of low scalar dissipation rate towards the jet shear layer is responsible for the observed non-monotonic trend in flame lift-off heights.
Keywords: MILD combustion; non-premixed flames; lifted flames; autoignition; flamelet theory
Description: Available online 16 June 2016
Rights: © 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
DOI: 10.1016/j.proci.2016.06.013
Published version:
Appears in Collections:Aurora harvest 8
Mechanical Engineering publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.