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RISCombustion Instability and Emission Control by Pulsating Fuel Injection
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Open-loop control methodologies were used to suppress symmetric and helical thermoacoustic instabilities in an experimental low-emission swirl-stabilized gas-turbine combustor. The controllers were ...
Tuning of the Acoustic Boundary Conditions of Combustion Test Rigs With Active Control: Extension to Actuators With Nonlinear Response
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the design process, new burners are generally tested in combustion test rigs. With these experiments, as well as with computational fluid dynamics, finite element calculations, and low-order ...
Assessment of Different Actuator Concepts for Acoustic Boundary Control of a Premixed Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the design process, new burners are generally tested in combustion test rigs. With these experiments, computational fluid dynamics, and finite element calculations, the burners’ performance in ...
Combustion Control by Vortex Breakdown Stabilization
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flame anchoring in a swirl-stabilized combustor occurs in an aerodynamically generated recirculation region which is a result of vortex breakdown (VBD). The characteristics of the recirculating ...
An Experimental Investigation of the Nonlinear Response of an Atmospheric Swirl-Stabilized Premixed Flame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Due to stringent emission restrictions, modern gas turbines mostly rely on lean premixed combustion. Since this combustion mode is susceptible to thermoacoustic instabilities, there is a need for ...
Acoustic Response of a Helmholtz Resonator Exposed to Hot-Gas Penetration and High Amplitude Oscillations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Helmholtz resonators are often used in the gas turbine industry for the damping of thermoacoustic instabilities. To prevent thermal destruction, these devices are usually cooled by a purging ...
Effects of Outlet Boundary Conditions on the Reacting Flow Field in a Swirl-Stabilized Burner at Dry and Humid Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: During the design and testing process of swirl-stabilized combustors, it is often impractical to maintain identical outlet boundary conditions. Furthermore, it is a common practice to intentionally ...
Comparison of Linear Stability Analysis With Experiments by Actively Tuning the Acoustic Boundary Conditions of a Premixed Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Linear stability analysis by means of low-order network models is widely spread in industry and academia to predict the thermoacoustic characteristics of combustion systems. Even though a vast ...
Thermoacoustic Modeling of a Gas Turbine Combustor Equipped With Acoustic Dampers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the TA3 thermoacoustic network is presented and used to simulate acoustic pulsations occurring in a heavy-duty ALSTOM gas turbine. In our approach, the combustion system is ...
Instability Control by Premixed Pilot Flames
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Premixed flames of swirl-stabilized combustors (displaced half-cone) are susceptible to thermo-acoustic instabilities, which should be avoided under all operating conditions in order to guarantee a ...