Numerical simulations of Jet-A combustion in a gas turbine combustion chamber

In order to develop a new multiple-fuel combustion chamber, a series of numerical simulations has been conducted on an existing combustion chamber, in order to determine the modifications required to allow its proper operation for multiple liquid fuels and fuel mixtures. The combustion chamber used in the simulations comes from a Garrett gas turbine engine, model GTP 30-67. A three-dimensional unsteady RANS numerical integration of the Navier-Stokes equations has been carried out, using an Eddy Dissipation combustion Model (EDM) and the k-e turbulence model, implemented in a numerical simulation conducted using the commercial software ANSYS CFX. To verify the numerical simulations accuracy, the outlet temperature has been recorded along 600 time-averaged iterations and compared with the designed turbine inlet temperature. Numerical simulations results have a good accuracy in this particular case, so it can be concluded that the used numerical models are valid and appropriate for use to simulate the combustion process under different conditions. Thus the results obtained in these simulations will help adapt the existing combustion chamber to different fuels and fuel mixtures.