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RISFlame Holding in the Premixing Zone of a Gas Turbine Model Combustor After Forced Ignition of H2–Natural Gas–Air Mixtures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flashback (FB) and self-ignition in the premixing zone of typical gas turbine swirl combustors in lean premixed operation are immanent risks and can lead to damage and failure of components. Thus, steady combustion in the ...
Modeling Approach for a Hydrolysis Reactor for the Ammonia Production in Maritime Selective Catalytic Reduction Applications
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The catalytic generation of ammonia from a liquid urea solution is a critical process determining the performance of selective catalytic reduction (SCR) systems. Solid deposits on the catalyst surface from the decomposition ...
NOx-Formation and CO-Burnout in Water-Injected, Premixed Natural Gas Flames at Typical Gas Turbine Combustor Residence Times
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With the transition of the power production markets toward renewable energy sources, an increased demand for flexible, fossil-based power production systems arises. Steep load gradients and a high range of flexibility make ...
Boundary Layer Flashback in Premixed Hydrogen–Air Flames With Acoustic Excitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Lean premixed combustion is prevailing in gas turbines to minimize nitrogen oxide emissions. However, this technology bears the risk of flame flashback and thermoacoustic instabilities. Thermoacoustic instabilities induce ...
Investigation of NO2 Formation Kinetics in Dual-Fuel Engines With Lean Premixed Methane–Air Charge
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: A dual fuel engine concept with lean premixed methane–air charge ignited by a diesel pilot flame is highly promising for reducing NOx and soot emissions. One drawback of this combustion method, however, is the high nitric ...
Energetically Consistent Computation of Combustor Stability With a Model Consisting of a Helmholtz Finite Element Method Domain and a Low-Order Network
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An efficient approach for the detection of the acoustic damping of gas turbine combustors is the combination of spatially resolved finite element method (FEM) approaches based on the Helmholtz equation with low-order ...
Amplitude-Dependent Damping and Driving Rates of High-Frequency Thermoacoustic Oscillations in a Lab-Scale Lean-Premixed Gas Turbine Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the numerical investigations of amplitude-dependent stability behavior of thermoacoustic oscillations at screech level frequencies in a lean-premixed, atmospheric, swirl-stabilized, lab-scale gas turbine ...
Influence of Hole-to-Hole Interaction on the Acoustic Behavior of Multi-Orifice Perforated Plates
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A key factor for developing low-emission combustion systems in modern gas turbines and aero-engines is the acoustic liner's optimized design. Several models are available in the literature for the acoustic impedance of ...
High-Frequency Mode Shape Dependent Flame-Acoustic Interactions in Reheat Flames
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas turbines featuring sequentially staged combustion systems offer excellent performance in terms of fuel flexibility, part load performance and combined-cycle efficiency. These reheat combustion systems are therefore a ...
Comparison of the Flame Dynamics of a Liquid-Fueled Swirl-Stabilized Combustor for Different Degrees of Fuel-Air Premixing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study investigates the flame dynamics of lean premixed kerosene combustion for two different degrees of fuel–air premixing using a swirl stabilized burner with an axially movable twin fluid fuel injection nozzle. ...