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2018-06-11 - Colloque/Présentation - poster - Anglais - 1 page(s)

Pappa Alessio , Cordier Marie , Bricteux Laurent , Bénard Pierre, De Paepe Ward , "Large Eddy Simulation of a Non-Reactive Flow in a Typical Micro Gas Turbine" in ASME Turbo Expo 2018: Turbomachinery Technical Conference & Exposition, Lillestrøm (Oslo), Norway, 2018

  • Codes CREF : Mécanique des fluides (DI1244), Combustion (DI2212), Turbines a gaz (DI2223), Programmation du calcul numérique (DI1166)
  • Unités de recherche UMONS : Thermique et Combustion (F704)
  • Instituts UMONS : Institut de Recherche en Energétique (Energie)

Abstract(s) :

(Anglais) One of the biggest concern of this century is related to the management of our energy resources. Next to the economical aspect, it also involves environmental issues, such as air pollution, inherent to the combustion process in gas turbine applications. Flameless oxydation can offer a path to increase combustion efficiency, NOx emission reduction and fuel flexibility. Moreover it allows to work in unconventional conditions such as those found in humidified cycles or in presence of Exhaust Gas Recirculation (EGR). This kind of combustion process involves complex fluid dynamics due to swirl and high recirculation levels in the chamber. In this framework, performing scale resolved simulations of the complex flow can provide a better understanding of the combustion process. In this poster, we will present preliminary LES results from simulations of the cold flow in a combustion chamber of a micro Gas Turbine (mGT). The influence of the swirl level is assessed on the non-reactive flow in a multi-perforated combustion chamber, representative for a typical mGT combustion chamber. The simulations, presented in this poster, are performed using the massively parallel LES flow solver YALES2 in order to predict the flow behaviour at a high fidelity level. Whereas this first step will focus on the impact of the swirl on the cold flow, further work includes the simulation of flameless combustion with EGR on a flexible humidified mGT. With these simulations, we will be able to assess the influence of EGR on flameless oxydation in both dry and humidified cycle.