Session: 04-17 Combustion Modeling V

Paper Number: 123810

123810 - Combustion Modelling of the T100 Micro-Gas Turbine Burner Including the Influence of the Stretch and Heat Loss/Gain Effects on the Flame 

The work presented in this paper focuses on the application of an extension for Zimont's Turbulent Flame Closure formulation to include the stretch and heat loss/gain effects on the flame. The effects are introduced by tabulating the consumption speed of laminar 1D counter-flow flames in a "fresh-to-burnt" configuration with detailed chemistry for different stretch and heat loss/gain values. An analysis of an enthalpy-based heat loss formulation is performed. Specifically, in the construction of the consumption speed look-up table, the heat loss/gain effects are applied not only to the combustion products but also to the reactants. The built look-up table is then included in Zimont's Turbulent Flame Closure expression, defining the turbulent flame speed as a function of the mentioned flame stretch and heat loss/gain. 
The necessity of evaluating the heat loss/gain effects on the reactants derives from the flow and geometrical characteristics of the Ansaldo Green Tech T100 micro-gas turbine (mGT) burner, the object of this study. The inlet reverse-flow air and the main line fuel distribution plenum, demand to take into account the burner heat loss/gain effects on the mixture before entering the combustion chamber. 
In a first step, the performances of the proposed model are validated by comparing computational fluid dynamics (CFD) simulations predictions to experimental data of an atmospheric turbulent premixed bluff-body stabilized methane (CH₄) flame. The model is then applied to the T100 burner,  emphasizing how the extension significantly improves the flame shape prediction with respect to the original Zimont model. 

Presenting Author: Giulio Generini University of Florence

Presenting Author Biography: My name is Giulio Generini, a PhD student from University of Florence Department of Industrial Engineering (DIEF).
I received my bachelor's degree in mechanical engineering in 2018 with a thesis named "Numerical analysis of heat transfer in a film-cooled gas turbine blade" and my master's degree in 2020 with a work by the name "Numerical Simulation of Fluid-Structure Interaction of blood flow in an elastic carotid artery".
After a brief period in the industry of steel thermal treatment, I started my PhD in 2021, working on different topics concerning CFD and FEM simulation and analysis. Specifically, I worked on particle simulation, secondary flow sealing systems, and micro-gas turbine combustion modeling.

Authors:

Giulio Generini University of Florence
Antonio Andreini University of Florence
Enrico Bianchi Ansaldo Green Tech