Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Thermal-diffusive instabilities in unstretched, planar diffusion flames
 
research article

Thermal-diffusive instabilities in unstretched, planar diffusion flames

Robert, Etienne  
•
Monkewitz, Peter  
2012
Combustion And Flame

The recent development of a novel research burner at EPFL has opened the way for experimental investigations of essentially unstretched planar diffusion flames. In particular, it has become feasible to experimentally validate theoretical models for thermal-diffusive instabilities in idealized one-dimensional diffusion flames. In this paper, the instabilities observed close to the lean extinction limit are mapped in parameter space, notably as function of the two reactant Lewis numbers. Cellular and pulsating instabilities are found at low and high Lewis numbers, respectively, as predicted by linear stability analyses. The detailed investigation of these two types of instabilities reveals the dependence of cell size and pulsation frequency on the transport properties of the reactants and on flow conditions. The experimental scaling of the cell size is found in good agreement with linear stability. The comparison between experimental and theoretical pulsation frequencies, on the other hand, was hampered by the impossibility of experimentally reproducing the parameters of the stability calculations. Hence, a heuristic correlation between pulsation frequency and flow parameters, transport properties, in particular the Damkohler number, and oscillation amplitude has been developed and awaits theoretical interpretation. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.combustflame.2011.10.020
Web of Science ID

WOS:000299855400029

Author(s)
Robert, Etienne  
Monkewitz, Peter  
Date Issued

2012

Publisher

Elsevier

Published in
Combustion And Flame
Volume

159

Start page

1228

End page

1238

Subjects

Diffusion flame

•

Unstrained

•

Thermal-diffusive instabilities

•

Stability

•

Oscillations

•

Cellularity

•

Extinction

•

Numbers

•

Onset

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMF  
Available on Infoscience
March 8, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/78536
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés