Effect of Radiation on Flow Regime in Can Type of Gas Turbine Combustor
R. D. Shaha and J. Banerjeeb
Department Mechanical Engineering , S. V. National Institute of Technology, Surat 395 007, Gujarat, India.
ards@med.svnit.ac.in
bjbaner@med.svnit.ac.in
ABSTRACT
Three dimensional numerical investigations are carried out on model gas turbine combustor geometry to study the effect of radiative mode of heat transfer on combustor flow regime. General purpose Computational Fluid Dynamics (CFD) tool FLUENT is used to perform numerical simulation. The gases like O2 and N2 do not emit or absorb radiation and are essentially transparent to incident thermal radiation. The augmentation or decay of radiation considered in the present study is only due to the hydrocarbon gases CO2 and H2O (vapour). The Discrete Ordinate Method (DOM) has been utilized for modeling Radiative Transfer Equation (RTE). Turbulent combustion of non-premixed air and propane as fuel is modeled using Probability Density Function (PDF) model. Computation including radiation model shows lower overall temperature and hence low NOX emission. Keywords: Gas turbine combustor, Radiative transfer equations, Turbulent combustion, Probability density function, DOM.
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