Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 401-420 of 9298
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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 ... -
Large Eddy Simulation of Soot Formation in a Real Aero-Engine Combustor Using Tabulated Chemistry and a Quadrature-Based Method of Moments
(The American Society of Mechanical Engineers (ASME), 2023)Considering the increasingly stringent targets for aircraft emissions, computational fluid dynamics (CFD) is becoming a viable tool for improving future aero-engine combustors. However, predicting pollutant formation remains ... -
Effect of Rim Seal Geometry on Rotationally-Driven Ingestion
(The American Society of Mechanical Engineers (ASME), 2024)This study investigates turbine rim seal geometry effects within the rotationally-driven ingestion regime. Computations were performed with a wall-resolved unsteady Reynolds-averaged Navier–Stokes (URANS) model and a ... -
The Effect of Film Development on Primary Breakup in a Prefilming Airblast Atomizer
(The American Society of Mechanical Engineers (ASME), 2024)Liquid fueled gas turbines are likely to remain a dominant force in aviation propulsion for the foreseeable future, and therefore understanding the atomization process is key to meeting future emissions and performance ... -
A Phenomenological Thermal Spray Wall Interaction Modeling Framework Applied to a High-Temperature Ignition Assistant Device
(The American Society of Mechanical Engineers (ASME), 2024)Airborne compression ignition engines must operate with reliable ignition systems to achieve proper ignition at every cycle, particularly at high altitudes. Glow-plug-based ignition-assistant (IA) devices can provide the ... -
Predicting the Performance of Turbine Exhaust Diffuser-Collector Systems Across the Operating Range: Comparison of Lattice-Boltzmann Method Simulations With Experiments
(The American Society of Mechanical Engineers (ASME), 2024)The predictive capability of the lattice-Boltzmann very large eddy simulation (LBM-VLES) methodology was evaluated for industrial gas turbine exhaust diffuser-collector applications. The effort focused on evaluating the ... -
Effect of Impurities on the Compatibility of Steels in Supercritical CO2 at 450°–650°C
(The American Society of Mechanical Engineers (ASME), 2024)Direct-fired supercritical CO2 (sCO2) power cycles are a pathway to low-CO2 fossil energy but contain O2 and H2O in the sCO2 from combustion. The effect of impurities on structural steels was investigated at 450°–650 °C ...