Abstract: Since lean premixed combustion allows for fuelefficiency and low emissions, it is nowadays state of the art in stationary gas turbines. In the long term, it is also a promising approach for aero engines, when safety issues ...

Abstract: Residence time distributions in a swirling, premixed combustor flow are determined by means of tracer experiments and a reactor network model. The measurements were conducted at nonreacting, reacting, and steamdiluted ...

Abstract: Amplitudedependent flame transfer functions, also denoted as flame describing functions, are valuable tools for the prediction of limitcycle amplitudes of thermoacoustic instabilities. However, the effects that govern the ...

Abstract: The majority of recent stationary gas turbine combustors employ swirling flows for flame stabilization. The swirling flow undergoes vortex breakdown (VB) and exhibits a complex flow field including zones of recirculating ...

Abstract: Humidified gas turbines (HGT) offer the attractive possibility of increasing plant efficiency without the cost of an additional steam turbine as is the case for a combined gassteam cycle. In addition to efficiency gains, ...

Abstract: Linear stability analysis is applied to a swirlstabilized combustor flow with the aim to understand how the flame shape and associated density field affects the manifestation of selfexcited flow instabilities. In isothermal ...

Abstract: Lean premixed gas turbulent flames stabilized in the flow generated by an industrial swirl burner with a central bluff body are experimentally found to behave bistable. This bistable behavior, which can be triggered via a ...

Abstract: The current paper investigates the nonlinear interaction of the flow field and the unsteady heat release rate and the role of swirl fluctuations. The test rig consists of a generic swirlstabilized combustor fed with natural ...

Abstract: Coherent flow structures in shear flows are generated by instabilities intrinsic to the hydrodynamic field. In a combustion environment, these structures may interact with the flame and cause unsteady heat release rate ...

Abstract: In the current study, the influence of pressure and steam on the emission formation in a premixed natural gas flame is investigated at pressures between 1.5 bar and 9 bar. A premixed, swirlstabilized combustor is developed ...