Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 721-740 of 9564
-
Characterization of High-Pressure Hydrogen Leakages
(The American Society of Mechanical Engineers (ASME), 2023)Reduction of gas turbine (GT) carbon emissions relies on a strategy for fueling the engines with pure or blended hydrogen. The major technical challenges to solve are (i) the adjustments to the engine and in particular the ... -
On the Demonstration of a Humid Combustion System Performing Flexible Fuel-Switch From Pure Hydrogen to Natural Gas With Ultra-Low NOx Emissions
(The American Society of Mechanical Engineers (ASME), 2023)To fight global warming the European Union formulated the objective of completely decarbonizing the energy sector, stimulating the advent of unconventional fuels and the adaption of the corresponding energy infrastructure. ... -
The Application of an Artificial Neural Network as a Baseline Model for Condition Monitoring of Innovative Humidified Micro Gas Turbine Cycles
(The American Society of Mechanical Engineers (ASME), 2023)Due to high penetration of renewables, the EU energy system is undergoing a transition from large-scale centralized generation toward small-scale distributed generation. The increasing share of intermittent renewables such ... -
Transient Performance Simulation of Gas Turbine Engine Based on Through-Flow Method and Experimental Verification
(The American Society of Mechanical Engineers (ASME), 2023)Current research on engine transient performance primarily focuses on the variation of key aerothermodynamic parameters in specific sections, neglecting the comprehensive understanding of the engine's inner flow field ... -
Turn-Down Capability of Ansaldo Energia's AE94.3A
(The American Society of Mechanical Engineers (ASME), 2023)At an ever-faster pace, market's requirements for operational flexibility and turn-down capabilities are fundamental for heavy-duty gas turbines. Gas turbine energy plants require the lowest minimum environmental load (MEL) ... -
The Role of Diffusive Mixing in Current and Future Aviation Fuels at Relevant Operating Conditions
(The American Society of Mechanical Engineers (ASME), 2023)With aviation's dependence on the high volumetric energy density offered by liquid fuels, Sustainable Aviation Fuels (SAFs) could offer the fastest path toward the decarbonization of aircrafts. However, the chemical ... -
Experimental Investigation of the Effect of Superheated Liquid Fuel Injection on the Combustion Characteristics of Lean Premixed Flames
(The American Society of Mechanical Engineers (ASME), 2023)The effect of superheated liquid fuel injection on the performance and emissions of a single nozzle combustor was investigated. Combustion of the lean premixed flames was achieved using a combination of jet and swirl as a ... -
Experiments on Tuned UHBR Open-Test-Case Fan ECL5/CATANA: Stability Limit
(The American Society of Mechanical Engineers (ASME), 2023)Research of the past decades has shown that the operating range of modern fans and compressors is often limited by aeroelastic phenomena before the onset of pure aerodynamic instability. Prediction of these mechanisms is ... -
Characterization of a Novel Additive Manufacturing Micromix Nozzle Burning Methane to Hydrogen
(The American Society of Mechanical Engineers (ASME), 2023)As the energy landscape transitions to low/zero-carbon fuels, gas turbine manufacturers are targeting fuel flexible operation with natural gas, syngas, and hydrogen-enriched mixtures. Having a single geometry that can ... -
Identification of Compressor Vibration Aerodynamic Forcing Mechanisms by Spectral Characteristics
(The American Society of Mechanical Engineers (ASME), 2023)Nonsynchronous vibration (NSV) in axial compressors can be caused either by (1) unsteady aerodynamic forces that are not related to motion of the blades or (2) motion-dependent aerodynamic forcing (e.g., flutter). Aerodynamic ... -
Conjugate Modeling of a Closed Co-Rotating Compressor Cavity
(The American Society of Mechanical Engineers (ASME), 2023)Robust methods to predict heat transfer are vital to accurately control the blade-tip clearance in compressors and the radial growth of the disks to which these blades are attached. Fundamentally, the flow in the cavity ... -
Comparison of Subspace Identification Methods for Modal Estimation of Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2023)Bladed disks are critical parts of aeronautic turbojet engines requiring numerous dynamic analysis tests to fully achieve their design process. This work presents subspace state-space identification techniques for estimation ... -
Methodology to Monitor Early Warnings Before Gas Turbine Trip
(The American Society of Mechanical Engineers (ASME), 2023)The current energy scenario requires that gas turbines (GTs) operate at their maximum efficiency and highest reliability. Trip is one of the most disrupting events that reduces GT availability and increases maintenance ... -
Development and Validation of a Segregated Conjugate Heat Transfer Procedure on a sCO2 Dry Gas Seal Test Bench
(The American Society of Mechanical Engineers (ASME), 2023)Carbondioxide at supercritical state shows particularly favorable thermodynamic properties for closed-loop Brayton and Rankine cycles. High density, close to a liquid, and low viscosity, close to a gas, drive to achieve ... -
The Structure and Stability of Premixed CH4, H2, and NH3/H2 Flames in an Axially Staged Can Combustor
(The American Society of Mechanical Engineers (ASME), 2023)An experimental investigation of flame structure, stability, and emissions performance was conducted in a two-stage lab-scale generic combustor design operated with CH4, H2, and NH3/H2 fuel blends. The main flame zone ... -
Fluid Dynamic Loss Model With Wide Applicability for Aeroengine Transmission Gears
(The American Society of Mechanical Engineers (ASME), 2023)In high-speed gear systems for aeroengines, it is important to reduce the fluid dynamic loss, which accounts for the majority of power loss, to improve fuel efficiency. For reasonable loss-reduction and the standardization ... -
Large-Eddy-Simulation of Turbulent Non-Premixed Hydrogen Combustion Using the Filtered Tabulated Chemistry Approach
(The American Society of Mechanical Engineers (ASME), 2024)With air traffic expected to grow 5% annually until the year 2030, alternative fuels such as hydrogen are being investigated in order to tackle the current environmental crisis. Due to safety concerns, future hydrogen ... -
Tilting Pad Journal Bearing Computational Fluid Dynamic Parametric Modeling for New Energy Transition Challenges
(The American Society of Mechanical Engineers (ASME), 2023)The necessity of increasing the efficiency and reducing the carbon foot-print of machines is pushing centrifugal compressor bearings design to higher and higher peripheral speed and lower oil consumptions especially in the ... -
Analysis of the Synchronous Response of Rotor Components by Wavelet Transform and Wavelet Probing
(The American Society of Mechanical Engineers (ASME), 2023)The measured synchronous response of rotor components may be analyzed with two objectives. On the one hand, the estimation of the response amplitude is necessary for structural calculations such as the assessment of the ... -
Experimental and Numerical Investigations of Steam Expansion Rate in Low Pressure Steam Turbine
(The American Society of Mechanical Engineers (ASME), 2023)This study focused on the expansion rate of steam; the effect on efficiency was investigated experimentally and numerically by varying the expansion rate of steam in the stage, where condensation occurs by varying the ...