Analysis of premixed flame propagation between two closely-spaced parallel plates

Motivated by experimental observations on premixed-gas flame propagation in Hele-Shaw cells, this work analyzes quasi-isobaric flame propagation between two adiabatic parallel plates using a simple quasi-2D formulation based on averaging the flow properties across the cell gap. Instabilities associa...

Full description

Saved in:
Bibliographic Details
Published in:Combustion and flame 2018-04, Vol.190, p.133-145
Main Authors: Fernández-Galisteo, Daniel, Kurdyumov, Vadim N., Ronney, Paul D.
Format: Article
Language:English
Subjects:
Adiabatic flow
Cellular flames
Computer simulation
Flame propagation
Hele-Shaw cell
Intrinsinc flame instabilities
Micro-scale combustion
Organic chemistry
Parallel plates
Propagation
Saffman–Taylor instability
Thermal energy
Thermal expansion
Thick flames
Time dependence
Viscosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Motivated by experimental observations on premixed-gas flame propagation in Hele-Shaw cells, this work analyzes quasi-isobaric flame propagation between two adiabatic parallel plates using a simple quasi-2D formulation based on averaging the flow properties across the cell gap. Instabilities associated with thermal expansion, buoyancy, viscosity change across the front and differential diffusion of thermal energy and reactants are investigated with one-step chemistry, constant heat capacity and variable transport coefficients through time-dependent computations of the flame front evolution in large domains. These instabilities are found to induce flame wrinkling which increases flame surface area and thus propagation speeds in ways different from those associated with freely propagating flames. The simulations are compared with experiments in Hele-Shaw cells; very good qualitative and (in some cases) quantitative agreement is found.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2017.11.022