Session: 04-17 Combustion Modeling V

Paper Number: 122234

122234 - Thickened Flame Model Extension for Dual Gas GT Combustion: Validation Against Single Cup Atmospheric Test 

The development of predictive combustion models is more and more strategic in the design definition of gas turbine combustor. The Thickened Flame Model (TFM), despite its high computational cost, is one of the most accurate approach available in literature since it can naturally take into account the non-equilibrium effects into the flame brush (i.e., strain and heat losses) as well as preferential diffusion when hydrogen is employed. Conversely, the original formulation of this combustion model needs several adjustments to accommodate the properties of the mixture when different streams of fuels and/or oxidizers are present in the system.

The present work represents a first step in the extension of this combustion model to handle multiple streams of fuels and oxidizers. More specifically, an industrial burner fed with two different fuel streams and air as oxidizer is considered. The pilot fuel line is fed with micro hydrogen injections (with the aim to enhance the lean blow-out margin) while the main one with pure methane. Dedicated tests are performed at the THT laboratory (University of Florence) to retrieve the main information characterizing the burner, such as the Particle Velocimetry Image for the flow field and OH* chemiluminescence for the flame shape and position using.

The comparison between the numerical results and the experimental data will provide highlights about the ability of the extended TFM to capture the main features of the flame stabilization mechanisms.

Presenting Author: Roberto Meloni Baker Hughes

Presenting Author Biography: Senior Combustion Engineer at baker hughes since 2014.

Authors:

Roberto Meloni Baker Hughes
Giulia Babazzi Baker Hughes
Nicola Giannini Baker Hughes
Simone Castellani Università degli Studi di Firenze
Pier Carlo Nassini Università degli studi di Firenze
Alessio Picchi Università degli studi di Firenze
Sofia Galeotti Università degli studi di Firenze
Riccardo Becchi Università degli studi di Firenze
Antonio Andreini Università degli studi di Firenze