Effects of coflow on turbulent flame puffs

AIAA Journal ◽  
2002 ◽  
Vol 40 ◽  
pp. 1355-1362
Author(s):  
J. C. Hermanson ◽  
R. Sangras ◽  
J. E. Usowicz ◽  
H. Johari
Keyword(s):  
Turbulent Flame

Turbulent flame-wall interactions for flames diluted by hot combustion products

2021 ◽  
Vol 230 ◽  
pp. 111432
Author(s):  
Bin Jiang ◽  
Davy Brouzet ◽  
Mohsen Talei ◽  
Robert L. Gordon ◽  
Quentin Cazeres ◽  
...  
Keyword(s):  
Turbulent Flame ◽  
Combustion Products ◽  
Wall Interactions

scholarly journals Numerical Investigation of Pressure Influence on the Confined Turbulent Boundary Layer Flashback Process

Fluids ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 146 ◽  
Author(s):  
Aaron Endres ◽  
Thomas Sattelmayer
Keyword(s):  
Boundary Layer ◽  
Gas Turbines ◽  
Separation Zone ◽  
Turbulent Flame ◽  
Pressure Rise ◽  
Flame Speed ◽  
Zone Size ◽  
Detailed Chemical Kinetics ◽  
Turbulent Flame Speed ◽  
Quenching Distance

Boundary layer flashback from the combustion chamber into the premixing section is a threat associated with the premixed combustion of hydrogen-containing fuels in gas turbines. In this study, the effect of pressure on the confined flashback behaviour of hydrogen-air flames was investigated numerically. This was done by means of large eddy simulations with finite rate chemistry as well as detailed chemical kinetics and diffusion models at pressures between 0 . 5 and 3 . It was found that the flashback propensity increases with increasing pressure. The separation zone size and the turbulent flame speed at flashback conditions decrease with increasing pressure, which decreases flashback propensity. At the same time the quenching distance decreases with increasing pressure, which increases flashback propensity. It is not possible to predict the occurrence of boundary layer flashback based on the turbulent flame speed or the ratio of separation zone size to quenching distance alone. Instead the interaction of all effects has to be accounted for when modelling boundary layer flashback. It was further found that the pressure rise ahead of the flame cannot be approximated by one-dimensional analyses and that the assumptions of the boundary layer theory are not satisfied during confined boundary layer flashback.

scholarly journals A Coalescence/Dispersion Model for Turbulent Flame Stability

AIAA Journal ◽  
1984 ◽  
Vol 22 (3) ◽  
pp. 388-393 ◽  
Author(s):  
Krishnan Radhakrishnan ◽  
David T. Pratt
Keyword(s):  
Dispersion Model ◽  
Turbulent Flame ◽  
Flame Stability
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