Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 661-680 of 9564
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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 ... -
Numerical Analysis of Flame Shape Impact on the Performance of Fuel Staging in a Lean-Burn Aeronautical Burner
(The American Society of Mechanical Engineers (ASME), 2023)The BIMER combustor is a lab-scale burner investigating fuel staging techniques as a stabilization strategy for lean premixed prevaporized combustion for aeronautical applications. Two stages compose its injection system: ... -
Reacting Flow Prediction of the Low-Swirl Lifted Flame in an Aeronautical Combustor With Angular Air Supply
(The American Society of Mechanical Engineers (ASME), 2024)The development of lean-burn combustion systems is of paramount importance for reducing the pollutant emissions of future aero engine generations. By tilting the burners of an annular combustor in circumferential direction ... -
Evaluation of Minimum NOx Emission From Ammonia Combustion
(The American Society of Mechanical Engineers (ASME), 2024)Ammonia (NH3) is being explored as a hydrogen carrier with no carbon emissions. However, if burned directly as NH3, rather than being completely decomposed back to N2/H2, the fuel-bound nitrogen comes with a potentially ... -
Integration of a Gas Model Into Computational Fluid Dynamics Analysis for the Simulation of Turbine Exhaust Flows With High Steam Loads
(The American Society of Mechanical Engineers (ASME), 2023)The water-enhanced turbofan (WET) is a promising future propulsion concept to reduce aero engine emissions. In the WET-engine, a heat exchanger uses turbine exhaust heat in order to generate superheated steam out of liquid ... -
The Hybrid Pathway to Flexible Power Turbines, Part II: Fast Data Transfer Methods Between Varying Fidelity Simulations, to Enable Efficient Conjugate Thermal Field Prediction
(The American Society of Mechanical Engineers (ASME), 2023)The global drive toward renewable energy is imposing challenging operating requirements on power turbines. Flexible load-leveling applications must accept more frequent and demanding start-stop cycles. Full transient ... -
Measurement of Temperature and Load Versus Bearing Displacement in a Thrust Foil Bearing: Differences Between Light Load and High Load Operation
(The American Society of Mechanical Engineers (ASME), 2023)This paper presents a test rig for evaluation of gas thrust foil bearings (GTFBs) and details measurements of load capacity conducted with a commercial GTFB comprising a single 360 deg, 0.127 mm thick top foil divided into ... -
A Literature Review of NOx Emissions in Current and Future State-of-the-Art Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2024)Current U.S. government policy seeks to achieve a completely carbon-free economy by 2050, with a carbon-free electricity sector by 2035 (per executive orders #14008 and #14057). To address these goals, the U.S. Department ... -
Analysis of Failure Forms of Bevel Gear, Shaft, and Bearing Structure System Considering Multi-Mode Damage Accumulation
(The American Society of Mechanical Engineers (ASME), 2023)During the working process, the structural system, including bevel gear, shaft, and bearing, located in the front journal of the high pressure compressor of the aeroengine rotor is affected by various loads such as assembly ... -
Predicting Premature Failures in Small Wind Turbines With Recurrence Plots
(The American Society of Mechanical Engineers (ASME), 2023)This paper presents the application of the recurrence plot as an alternative for preprocessing the raw data. The recurrence plots can extract the nonlinear and transient response and are sensitive to slight variations in ... -
Integrated Aerodynamic and Mechanical Design of a Large-Scale Axial Turbine Operating With A Supercritical Carbon Dioxide Mixture
(The American Society of Mechanical Engineers (ASME), 2023)In this paper, the design of a large-scale axial turbine operating with supercritical carbon dioxide (sCO2) blended with sulfur dioxide (SO2) is presented considering aerodynamic and mechanical design aspects as well as ... -
Numerical Investigations of Near Surge Operating Conditions in a Two-Stage Radial Compressor With Refrigerant Gas
(The American Society of Mechanical Engineers (ASME), 2023)Modern compressor design targets require high performance and a wide operating range in order to reduce the environmental impact. To understand the fluid dynamics mechanisms that trigger instability, studying the system ... -
Manufacturing and Hydro Testing of a 10 MWe sCO2 Axial Turbine
(The American Society of Mechanical Engineers (ASME), 2023)Supercritical CO2 (sCO2) power cycles designed for thermodynamic efficiencies above 50% push component designs into pressure and temperature combinations that approach the limits of American Society of Mechanical Engineers ... -
Techno-Economic Analysis of a Physisorption-Based Hydrogen Storage System
(The American Society of Mechanical Engineers (ASME), 2023)Alternative long-term storage of energy is becoming increasingly important due to climate change. Hydrogen-based storage technologies have long been considered promising alternatives to batteries. However, the different ... -
Techno-Economic Analysis of the Solid Oxide Semi-Closed CO2 Cycle and Comparison With Other Power Generation Cycles With CO2 Capture
(The American Society of Mechanical Engineers (ASME), 2023)This work presents the techno-economic analysis of the solid oxide semi-closed CO2 cycle (SOS-CO2), a hybrid semi-closed cycle with solid oxide fuel cells (SOFC) recently developed by Politecnico di Milano for power ...