scholarly journals Computation of laminar premixed flame extinction limits in the unburnt-to-unburnt opposed flow configuration with upstream heat loss

1996 ◽  
Vol 24 (8) ◽  
pp. 105-113 ◽  
Author(s):  
G. Dixon-Lewis
Keyword(s):  
Heat Loss ◽  
Premixed Flame ◽  
Flame Extinction ◽  
Flow Configuration ◽  
Opposed Flow

scholarly journals Impact of Stretch and Heat Loss on Flame Stabilization in a Lean Premixed Flame approaching Blow-off

2018 ◽  
Vol 148 ◽  
pp. 250-257 ◽  
Author(s):  
Pier Carlo Nassini ◽  
Daniele Pampaloni ◽  
Antonio Andreini
Keyword(s):  
Heat Loss ◽  
Flame Stabilization ◽  
Premixed Flame ◽  
Lean Premixed

On the Stability of Planar Premixed Flames Under Nonadiabatic Conditions and Preferential Diffusion

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
Eman Al-Sarairah ◽  
Bilal Al-Hasanat ◽  
Ahmed Hachicha
Keyword(s):  
Heat Loss ◽  
Numerical Study ◽  
Lewis Number ◽  
Premixed Flame ◽  
Constant Density ◽  
Damkohler Number ◽  
Damköhler Number ◽  
Number Ratio ◽  
Preferential Diffusion ◽  
The Stability

In this paper, we provide a numerical study of the stability analysis of a planar premixed flame. The interaction of preferential diffusion and heat loss for a planar premixed flame is investigated using a thermodiffusive (constant density) model. The flame is studied as a function of three nondimensional parameters, namely, Damköhler number (ratio of diffusion time to chemical time), Lewis number (ratio of thermal to species diffusivity), and heat loss. A maximum of four solutions are identified in some cases, two of which are stable. The behavior of the eigenvalues of the linearized system of stabilty is also discussed. For low Lewis number, the heat loss plays a major role in stabilizing the flame for some moderately high values of Damköhler number. The results show the effect of increasing or decreasing Lewis number on adiabatic and nonadiabatic flames temperature and reaction rate as well as the range of heat loss at which flames can survive.

Combined Influence of Strain and Heat Loss on Turbulent Premixed Flame Stabilization

2015 ◽  
Vol 97 (1) ◽  
pp. 263-294 ◽  
Author(s):  
Luis Tay-Wo-Chong ◽  
Mathieu Zellhuber ◽  
Thomas Komarek ◽  
Hong G. Im ◽  
Wolfgang Polifke
Keyword(s):  
Heat Loss ◽  
Flame Stabilization ◽  
Premixed Flame ◽  
Turbulent Premixed Flame ◽  
Turbulent Premixed
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