Farmer, JR
1996
Modeling of Industrial Gas Turbine Combustors
Meng, F.L.; Farmer, J.R.; Brewster, B.S. and Smoot, L.D.
Proceedings of the Fall 1996 Meeting of the Western States Section / The Combustion Institute, The University of Southern California, Los Angeles, California, October 28-29, 1996. Funded by ACERC.
A new model has been developed for simulating modern gas turbine combustors. The new model includes the capability of simulating lean, premixed combustion of methane (or natural gas) and air, and uses and unstructured-grid flow solver to accommodate geometrical complexity. The set of incompressible, steady state, Navier-Stokes equations is solved using a co-located, equal-order, control volume finite element method. The convection term is treated using the mass-weighted, skew upwind scheme, and the diffusion, pressure gradient, and source terms are interpolated linearly in each element. Turbulence is modeled using the kappa-epsilon model. Convective and radiative heat losses are modeled using a wall function method and a discrete ordinates method, respectively. The interaction between turbulence and chemistry is modeled using the velocity-composition Monte-Carlo PDF approach, coupled with a multiple-step reaction mechanism for methane and air. Validation of the code has been initiated by modeling lean, premixed combustion (Phi = 0.8) of natural gas and air in a laboratory-scale, gas turbine combustor with a simple, two-step kinetic mechanism for CH4-O2. Comparison with detailed measurements is forthcoming. Application to industrial gas turbine combustor components is also underway.
Farmer, JR
1996
Modeling of Industrial Gas Turbine Combustors
Meng, F.L.; Farmer, J.R.; Brewster, B.S. and Smoot, L.D.
Proceedings of the Fall 1996 Meeting of the Western States Section / The Combustion Institute, The University of Southern California, Los Angeles, California, October 28-29, 1996. Funded by ACERC.
A new model has been developed for simulating modern gas turbine combustors. The new model includes the capability of simulating lean, premixed combustion of methane (or natural gas) and air, and uses and unstructured-grid flow solver to accommodate geometrical complexity. The set of incompressible, steady state, Navier-Stokes equations is solved using a co-located, equal-order, control volume finite element method. The convection term is treated using the mass-weighted, skew upwind scheme, and the diffusion, pressure gradient, and source terms are interpolated linearly in each element. Turbulence is modeled using the kappa-epsilon model. Convective and radiative heat losses are modeled using a wall function method and a discrete ordinates method, respectively. The interaction between turbulence and chemistry is modeled using the velocity-composition Monte-Carlo PDF approach, coupled with a multiple-step reaction mechanism for methane and air. Validation of the code has been initiated by modeling lean, premixed combustion (Phi = 0.8) of natural gas and air in a laboratory-scale, gas turbine combustor with a simple, two-step kinetic mechanism for CH4-O2. Comparison with detailed measurements is forthcoming. Application to industrial gas turbine combustor components is also underway.