scholarly journals DNS Analysis on the Indirect Relationship between the Local Burning Velocity and the Flame Displacement Speed of Turbulent Premixed Flames

2014 ◽  
Vol 04 (03) ◽  
pp. 288-297
Author(s):  
Kazuya Tsuboi ◽  
Eiji Tomita
Keyword(s):  
Burning Velocity ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Displacement Speed ◽  
Indirect Relationship ◽  
Local Burning ◽  
Turbulent Premixed

DNS Analysis on Local Burning Velocity and Flame Displacement Speed of Turbulent Premixed Flames With Different Density Ratio

2011 ◽  
Author(s):  
Kazuya Tsuboi ◽  
Tatsuya Hasegawa
Keyword(s):  
Burning Velocity ◽  
Density Ratio ◽  
Premixed Flames ◽  
Numerical Results ◽  
Turbulent Premixed Flames ◽  
Present Measurement ◽  
Displacement Speed ◽  
The Relationship ◽  
Local Burning ◽  
Turbulent Premixed

To investigate the relationship between local burning velocity and flame displacement speed with different density ratio, a numerical analysis was performed using DNS databases of statistically steady and fully developed turbulent premixed flames. The local burning velocity based on fuel consumption rate is considered to be most appropriate as the definition of burning rate because combustion is a kind of chemical reactions. Since it is impossible, however, that the local burning velocity is obtained experimentally by using any present measurement technology, the numerical results using the local burning velocity cannot be compared with any experimental data. Hence the flame displacement speed, which can be obtained and compared easily with experiments, has previously been used for numerical analyses. Thus, to realize comparison of numerical results using the local burning velocity with some experimental ones, it is necessary to reveal the relationship between the local burning velocity and the flame displacement speed.

scholarly journals Evaluation of the Local Burning Velocity Using DNS Data of Turbulent Premixed Flames

2014 ◽  
Vol 06 (12) ◽  
pp. 1030-1036
Author(s):  
Kazuya Tsuboi ◽  
Ryoji Matsugi ◽  
Eiji Tomita
Keyword(s):  
Burning Velocity ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Local Burning ◽  
Turbulent Premixed

COMPUTATIONAL FLUID DYNAMIC ANALYSIS OF COUNTERFLOW TURBULENT PREMIXED FLAMES BY THE COHERENT FLAMELET MODEL

2000 ◽  
Vol 24 (1A) ◽  
pp. 33-44
Author(s):  
E. Lee ◽  
K.Y. Huh
Keyword(s):  
Source Term ◽  
Fluid Dynamic ◽  
Burning Velocity ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Computational Fluid Dynamic Analysis ◽  
Flamelet Model ◽  
Turbulent Burning Velocity ◽  
The Relationship ◽  
Turbulent Premixed

The Coherent Flamelet Model (CFM) is applied to symmetric counterflow turbulent premixed flames studied by Kostiuk et al. The flame source term is set proportional to the sum of the mean and turbulent rate of strain while flame quenching is modeled by an additional multiplication factor to the flame source term. The turbulent rate of strain is set proportional to the turbulent intensity to match the correlation for the turbulent burning velocity investigated by Abdel-Gayed et al. The predicted flame position and turbulent flow field coincide well with the experimental observations. The relationship between the Reynolds averaged reaction progress variable and flame density seems to show a wrong trend due to inappropriate modeling of the sink and source term in the transport equation.

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