Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 381-400 of 9298
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Role of the Equivalence Ratio on Soot Formation in a Perfectly Premixed Turbulent Swirled Flame: A Combined Experimental and Large Eddy Simulations Study
(The American Society of Mechanical Engineers (ASME), 2024)The understanding of processes that govern soot production in aero-engines is fundamental for the design of new combustion systems with low environmental impact. Many combustors, more specifically those used in aero-engines, ... -
Spatially Resolved Modeling of the Nonlinear Dynamics of a Laminar Premixed Flame With a Multilayer Perceptron—Convolution Autoencoder Network
(The American Society of Mechanical Engineers (ASME), 2024)This work presents a multilayer perceptron-convolutional auto-encoder (MLP-CAE) neural network, which accurately predicts the two-dimensional flame dynamics of an acoustically excited premixed laminar flame. The architecture ... -
Scaling of Lean Aeronautical Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2024)A numerical procedure is presented for the scaling of lean aeronautical gas turbine combustors to different thrust classes. The procedure considers multiple operating points and aims for a self-similar flow field with ... -
Influence of Variable Swirl on Emissions in a Non-Premixed Fuel-Flexible Burner at Elevated Ambient Conditions
(The American Society of Mechanical Engineers (ASME), 2024)As alternative fuels are designated for future energy applications, flexible combustor designs require considerable development to ensure stable operation with reduced NOx emissions. A nonpremixed variable swirl burner was ... -
Investigation of Fuel and Load Flexibility of an Atmospheric Single Nozzle Jet-Stabilized FLOX® Combustor With Hydrogen/Methane-Air Mixtures
(The American Society of Mechanical Engineers (ASME), 2023)In this work, an existing single nozzle FLOX® (FLOX®, WS Wärmeprozesstechnik GmbH, Renningen, Germany) burner was modified with a fuel nozzle that was installed concentrically inside the outer air nozzle and was arranged ... -
Nondestructive Inspection of Hot Corrosion Damage on Internal Surfaces of Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2023)Two nondestructive techniques for the identification of hot corrosion damage on internal surfaces were investigated: magnetic permeability measurements and X-ray computed tomography (CT). A group of sixty-one Solar Titan ... -
Fluid Dynamic Behavior of Conventional and Pressure Relieving Brush Seals
(The American Society of Mechanical Engineers (ASME), 2023)Brush seals consist of a static ring of densely packed, flexible, fine wire bristles that provide resistance to the flow. Pressure relieving brush seals can be employed to overcome issues such as hysteresis that affect ... -
Thermo-Economic Analysis of Solar-Powered Trigeneration System With Integrated Ejector-Absorption Recompression and Modified Organic Rankine Cycle
(The American Society of Mechanical Engineers (ASME), 2024)In this study, the organic Rankine cycle (ORC) and hybrid absorption recompression cycle have been modified by the addition of turbine bleeding with regeneration and ejector, making it a unique solar-powered trigeneration ... -
Multidisciplinary Prediction of Spatial–Temporal Evolution of Creep Damage on an Internally Cooled Turbine Vane
(The American Society of Mechanical Engineers (ASME), 2024)One of the main causes of damage to gas turbine nozzle guide vanes (NGVs) is creep, which threatens the safety and reliability of gas turbines. Although creep life prediction has been applied to design and maintenance, ... -
Modeling Flame Transfer Functions of an Industrial Premixed Burner
(The American Society of Mechanical Engineers (ASME), 2023)This paper presents an analysis of the unsteady heat release rate response of industrially relevant axisymmetric premixed flames to harmonic velocity perturbations. The heat release rate response, quantified using the flame ... -
Application of a Multidisciplinary Design Process to Assess the Influence of Requirements and Constraints on the Design of Military Engines
(The American Society of Mechanical Engineers (ASME), 2023)The design of supersonic military aircraft is a complex multidisciplinary optimization process in which the dependencies and strong interactions between engine and aircraft must be imperatively considered. Applying a fully ... -
Impact of Preheating on Flame Stabilization and NOx Emissions From a Dual Swirl Hydrogen Injector
(The American Society of Mechanical Engineers (ASME), 2023)Flame stabilization, flame structure, and pollutant emissions are investigated experimentally on a swirled injection system operating with globally lean air/hydrogen mixtures at atmospheric conditions and moderate Reynolds ... -
Impact of Cylinder-to-Cylinder Dispersion of Exhaust Gas Recirculation on the Three-Way Catalyst Performance and Tailpipe Emissions of Spark-Ignition Engines
(The American Society of Mechanical Engineers (ASME), 2024)New generations of spark-ignition engines include exhaust gas recirculation (EGR) to improve the engine efficiency. Depending on the design of the EGR routing, some differences in the total amount of recirculated gases ... -
Parametric Vibration and Combined Resonance of a Bending-Torsional Coupled Turbine Blade With a Preset Angle
(The American Society of Mechanical Engineers (ASME), 2024)The parametric vibration and combined resonance of a turbine blade with a preset angle subjected to the combined effect of parametric and forced excitation were investigated. The blade was modeled as a rotating beam ... -
Multiobjective Optimization Study on the Aerodynamic Performance and Anti-Erosion Characteristics of a Single-Stage Dusty Flue Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Solid particle erosion of dusty energy recovery turbine blades has a great impact on the operating economics and safety of the unit. To mitigate the erosion of blade and improve the aerodynamic performance of the turbine, ... -
Evaluation of Water-Cooling Effect in Hydrogen-Fed SOFC for High-Efficiency Combined System Design
(The American Society of Mechanical Engineers (ASME), 2024)If pure hydrogen is used as a fuel in high-temperature fuel cells, waste heat must be removed by air cooling, which requires increased power consumption for supplying excess air. This study presents a hydrogen-fed solid ... -
Applicability of Numerical Simulation to the Classification of Fluid Dynamic Loss in Aeroengine Transmission Gears
(The American Society of Mechanical Engineers (ASME), 2023)In high-speed gear systems for aeroengines, reducing the fluid dynamic loss, which accounts for the majority of power loss, can significantly improve fuel economy. However, few practical numerical examples are available ... -
Thermoacoustic Characterization of a Premixed Multi Jet Burner for Hydrogen and Natural Gas Combustion
(The American Society of Mechanical Engineers (ASME), 2023)In this study, the acoustics and flame dynamics of a prototype multi jet burner with 19 individual mixing tubes for operation with pure hydrogen and pure natural gas are experimentally investigated. The burner transfer ... -
Experimental Measurements of Flow-Averaged Toroidal Vortices in Buoyancy-Dominated Rotating Cavities
(The American Society of Mechanical Engineers (ASME), 2023)The flow structures and heat transfer within rotating cavities of aero-engine axial compressors influence the thermal expansion of the rotor disks, and consequently the blade-tip clearances. To investigate the flow field ... -
Effect of Fuel Reactivity and Operating Conditions on Flame Anchoring in the Premixing Zone of a Swirl Stabilized Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2023)Flashback with subsequent flame anchoring (FA) is an inherent risk of lean premixed gas turbine combustors operated with highly reactive fuel. The present study has been performed to characterize flame stabilization in the ...