OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Numerical study of ignition and inter-sector flame propagation in gas turbine

Esclapez, Lucas. Numerical study of ignition and inter-sector flame propagation in gas turbine. PhD, Energétique et Transferts, Institut National Polytechnique de Toulouse, 2015

[img]
Preview
(Document in English)

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
9MB
[img]
Preview
(Document in English)

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
10MB
[img]
Preview
(Document in English)

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
5MB

Abstract

For safety reasons, in-flight relight of the engine must be guaranteed over a wide range of operating conditions but the increasing stringency of pollutant emission constraints requires the development of new aero-engine combustor whose design might be detrimental to the ignition capability. To improve the knowledge of the ignition process in aeronautical gas turbines and better combine conflicting technological solutions, current research relies on both complex experimental investigation and high fidelity numerical simulations. In this work, numerical study of the ignition process in gas turbines from the energy deposit to the light-around is performed with several objectives: increase the level of confidence of Large Eddy Simulations tool for the analysis of the ignition process, investigate the mechanisms controlling ignition in conditions representative of realistic aeronautical gas turbine flows and improve the low-order methodologies for the prediction of ignition performance. In a first part, LES of the single burner installed at CORIA (France) is carried out and allows to highlight the LES accuracy and to build a database on which the main mechanisms controlling the ignition success are identified. Based on these results, a methodology is developed to predict the ignition performance at a low computational cost using the non-reacting flow statistics only. In a second part, the light-around process is studied on two experimental set-ups and the very good agreement of the LES results with experiments is the starting point from an analysis of the mechanisms driving the flame propagation process.

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Laboratory name:
Research Director:
Cuenot, Bénédicte and Riber, Eleonore
Statistics:download
Deposited By: Thèse INPT
Deposited On:31 Mar 2016 09:31

Repository Staff Only: item control page