Abstract: This paper develops a formalism for optimizing nozzle location/configuration with respect to combustion stability of high-frequency transverse modes in a can combustor. The stability of these acoustically noncompact flames ...

Abstract: Premixed flames are sensitive to flow disturbances, which can arise from acoustic or vortical fluctuations. For transverse instabilities, it is known that a dominant mechanism for flame response is “injector coupling,” ...

Abstract: This paper describes measurements and modeling of the response of a swirling, lifted flame to transverse flow excitation. The problem is motivated by combustion instabilities associated with transverse acoustic modes of ...

Abstract: Swirling jets are canonical flow fields used to stabilize flames in many gas-turbine combustion systems. These flows amplify background acoustic disturbances and perturb the flame, producing combustion noise and potentially ...

Abstract: Future energy conversion devices need to operate in dynamic environments with stringent emissions requirements and various potential fuels, including hydrogen, ammonia, methane, and other light hydrocarbons from fossil or ...

Abstract: Thermoacoustic instabilities in annular or circular combustors are often coupled with azimuthal modes. These modes can be characterized by a spin ratio (SR), which quantifies the dominant mode between two counterrotating ...

Abstract: Hydrogen (H2) fuel for gas turbines is a promising approach for long duration storage and dispatchable utilization of intermittent renewable power. A major global discussion point, however, is the potential air quality ...