CUED Publications database

Large Eddy Simulation of flame edge evolution in a spark-ignited methane-air jet

Chen, Z and Ruan, S and Swaminathan, N (2017) Large Eddy Simulation of flame edge evolution in a spark-ignited methane-air jet. Proceedings of the Combustion Institute, 36. pp. 1645-1652. ISSN 1540-7489

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Abstract

The unsteady evolution of lifted CH 4 -air jet flames following spark ignition was investigated using Large Eddy Simulation. A presumed joint Probability Density Function (PDF) approach was used for the sub-grid combustion modeling accounting for both premixed and non-premixed mode contributions. Two flames one with high and another with low jet velocities were studied and the computed temporal variation of flame leading point agreed very well with the measured data for both the transient evolution and final lift-off height. The joint PDF of the axial and radial stabilization locations showed that these locations were correlated with the jet exit velocity. The flame leading point evolution in the three-dimensional physical space was analyzed using its trajectory starting from the ignition location to the final lift-off height. A spiral-shaped path was observed for both velocity cases showing different flame propagation behaviors at different heights from the jet exit.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:08
Last Modified: 19 Oct 2017 01:28
DOI: