Challenges and Progress in Controlling Dynamics in Gas Turbine Combustors

TLDR: In this article, the components of a combined analytical, experimental, and computational approach to understand and control combustion dynamics are developed for turbopropulsion engine combustors and industrial combustors.

Abstract: Combustion dynamics impact the design of both conventional diffusion e ame gas turbine combustors and lean premixed combustion systems. The occurrence of dynamics in diffusion e ame combustors can generally be eliminated through changes to the fueling system or operating characteristics driven primarily through empirical design know-how. Lean premixed combustors, such as industrial aeroderivative dry low-emissions combustors, have more persistent dynamics problems that are only partially ameliorated with application of empirical tools and controls. With continuing emphasis on reducing emissions and cost and increasing performance of turbopropulsion engine combustors, the design direction of e ight engines is approaching the lean premixed limit; thus, there is a need for improved tools and control strategies for combustion dynamics in these applications as well. The components of a combined analytical, experimental, and computational approach to understanding and controlling combustion dynamics are being developed. With successful implementation of such an analytical and control mechanism, further improvements in the emissions, stability, and durability characteristics of both e ight and industrial combustors will become possible.