Numerical simulations of combustion process in a gas turbine with a single and multi-point fuel injection system
作者： Artur Tyliszczak , Andrzej Boguslawski , Dariusz Nowak
DOI: 10.1016/J.APENERGY.2016.04.106
关键词:
摘要: Abstract The paper presents a numerical study of medium size model industrial gas turbine combustor. research was conducted using the RANS (Reynolds Averaged Navier–Stokes) approach with k – ∊ and LES (Large Eddy Simulation) WALE (Wall Adapting Local viscosity) subgrid model. simulations were performed in cold reacting flow conditions. In latter case, combustion process modelled steady flamelet chemical mechanisms Smooke 16 species 25 elementary reactions, GRI-2.11 49 277 reactions including NO chemistry. first part paper, results validated against experimental data velocity field, temperature concentrations. components predicted for agree very well measurements. case flow, some discrepancies observed both field However, main flame characteristics captured correctly. It turned out that kinetics had larger impact on than turbulence second we modified fuel air injection method analysed how changes introduced affect dynamics. shown that: (i) depending distribution air, velocity, composition upper chamber can be significantly altered; (ii) more substantial achieved by shifting points; their location outside recirculation zone leads to dangerous situation resulting overheating walls; (iii) it turns differences vanish approaching outlet plane mixture compositions are similar.
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