This paper presents the results of a second-order closure Conditional Moment Closure model applied to a lifted turbulent H 2 -air flame. The objective is to find out how a second-order closure will modify the lift-off height compared to first-order results. A 10-step chemical mechanism is used to predict rates of reaction in hydrogen-air mixtures but the second-order correction terms are calculated using one-step chemistry. First a progress variable for this reduced mechanism is defined and an additional equation for its conditional variance is derived. The level of the conditional fluctuation is found to be around 30% of its maximum value for stoichiometric mixtures in the flame stabilisation area. The second-order closure has a distinct effect on the flame position determined in the simulations.
@article{898,
title = {A second-order conditional moment closure model for the simulation of a lifted turbulent flame},
journal = {ANZIAM Journal},
volume = {45},
year = {2004},
doi = {10.21914/anziamj.v45i0.898},
language = {EN},
url = {http://dml.mathdoc.fr/item/898}
}
Devaud, C. B. A second-order conditional moment closure model for the simulation of a lifted turbulent flame. ANZIAM Journal, Tome 45 (2004) . doi : 10.21914/anziamj.v45i0.898. http://gdmltest.u-ga.fr/item/898/