logo SBA

ETD

Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-09152015-102914


Tipo di tesi
Tesi di laurea magistrale
Autore
DI FIORE, DANILA
URN
etd-09152015-102914
Titolo
Implementation of a directed relation graph method for the dynamic reduction of detailed kinetic mechanisms
Dipartimento
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA ENERGETICA
Relatori
relatore Galletti, Chiara
relatore Parente, Alessandro
Parole chiave
  • CFD
  • directed relation graph method
  • kinetic mechanism reduction
  • laminar flames
  • open source
Data inizio appello
01/10/2015
Consultabilità
Completa
Riassunto
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.
File