• CFD
• directed relation graph method
• kinetic mechanism reduction
• laminar flames
• open source

Only the use of large detailed kinetic mechanisms is able to describe accurately combustion phenomena. However, it is prohibitive to use them for CFD simulations of practical systems that involve complex geometries, heat exchanges, radiation and turbolent flows. Hence, the reduction of detailed kinetic mechanisms is widely applied with the purpose to provide affordable (skeletal, reduced or even global) schemes. Usually reduction is preformed with a pre-processing analysis in which a specific range of operating conditions is used; however the reduced scheme will be applied to a flame in which characteristics may differ in space and time.

The objective of this Thesis is to implement a reduction method to be used on-the-fly in numerical simulations of reactive flows, thus able to adapt the reduction procedure to the different conditions across the flame. The Directed Relation Graph method was chose because its simplicity and implemented using an open-source library called OpenSMOKE++. The DRG method was validate first in 1-D systems, batch and transient stirred reactors, to verify the accuracy of the algorithm. Than, it was used in laminar pulsating coflow flames, confirming the ability to provide results similar to those obtained with detailed schemes but with a strong reduction of CPU time.