Abstract The desire to reduce gas turbine emissions drives the use of design optimization approaches within combustor process. However, relative cost combustion simulations can prohibit such optimizations from being carried out an industrial setting. Strategies which significantly studies enable designers further improve performance. This paper investigates application a multifidelity surrogate...

Self-excited spinning mode azimuthal instability in an annular combustor with non-swirling flow is investigated using large eddy simulation (LES). Compressible Navier-Stoke equations are solved a flamelet combustion model to describe the subgrid chemistry$-$turbulence interactions. Two models, and without heat loss effects, compared elucidate non-adiabatic wall effects on thermoacoustic instabi...

This paper presents the numerical and experimental investigation of a straight core annular diffuser normally used in marine gas turbine combustor. The flow in the annular diffuser has been simulated by solving the equations for conservation of mass and momentum. For turbulence modeling the standard k-ε model is employed and the predicted results have been validated with experiments. A five-hol...

The present work addresses unsteady flame dynamics in a lean-premixed swirl-stabilized combustor, with attention focused on the transition of flame structure from a stable to an unstable state. It was found that the inlet temperature and equivalence ratio are the two most important variables determining the stability characteristics of the combustor. A slight increase in the inlet mixture tempe...

A power criterion for selecting the electric motor used in a gas turbine emulator is defined. The power criterion is derived in terms of the ratio of inertias between the gas turbine engine and the electric motor, rotational losses and load torque. The gas turbine emulator allows emulating the speed-torque behavior of a gas turbine engine. Using simulation models, we show that the steady-state ...