Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 441-460 of 9564
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An Investigation of a Multi-Injector, Premix/Micromix Burner Burning Pure Methane to Pure Hydrogen
(The American Society of Mechanical Engineers (ASME), 2025)Micromix combustion technology has been identified as a promising strategy to mitigate the risks associated with burning high-hydrogen-content fuels. This technology has recently been introduced in premixed injector designs ... -
Forecasting High Cycle and Very High Cycle Fatigue Through Enhanced Strain-Energy Based Fatigue Life Prediction
(The American Society of Mechanical Engineers (ASME), 2025)This study applies a novel strain-energy based fatigue life prediction method to low cycle fatigue (LCF) data additive manufactured (AM) Inconel 718 round dog-bones, specifically focusing on cycles to failure less than ... -
Evaluation of Subfilter Model Performance for Large-Eddy Simulations of Supercritical Fluids
(The American Society of Mechanical Engineers (ASME), 2025)The accuracy of three large-eddy simulations (LES) is assessed using a reference dataset obtained via direct numerical simulation (DNS). All of the LES simulations employ the dynamic Smagorinsky model to close the momentum ... -
In Situ Species Concentration Measurements in Ammonia-Mix Flames Using FTIR Spectroscopy
(The American Society of Mechanical Engineers (ASME), 2025)Hydrogen and ammonia represent two carbon-free fuel sources that could be used in place of current fossil energy sources in combustion systems. To develop optimized ammonia combustion systems, validated modeling tools are ... -
Transient Analysis of Flow Unsteadiness and Machine Instabilities in a Centrifugal Compressor at Surge and Second Quadrant Operation
(The American Society of Mechanical Engineers (ASME), 2024)Instabilities in turbomachinery operation originate from intrinsic flow unsteadiness, sudden variations of operating conditions, and interactions with the surrounding system, affecting both system stability and machine ... -
Numerical Modeling of a Primary Heat Exchanger in sCO2 Power Cycles for Thermal Energy Storage Systems
(The American Society of Mechanical Engineers (ASME), 2024)Renewable energy sources are the key for long-term decarbonization of energy. However, the intermittent nature of renewables does not always meet the energy demand in the electrical grid. Thus, electrical heated thermal ... -
Techno-Economic Comparative Assessment of High-Temperature Heat Pump Architectures for Industrial Pumped Thermal Energy Storage
(The American Society of Mechanical Engineers (ASME), 2024)The industrial sector is a key global source of wealth, but it is also recognized as a major challenge toward worldwide decarbonization. Today, the industrial sector requires more than 22% of the global energy demand as ... -
Multimodal Shunt Damping of Monolithic Bladed Drums Using Multiple Digital Vibration Absorbers
(The American Society of Mechanical Engineers (ASME), 2024)Based on a digital realization of piezoelectric shunt circuits, this work presents a proof-of-concept damping approach tailored to address the complex dynamics of monolithic bladed drums (BluMs) and attenuate their vibrations. ... -
The Role of the Working Fluid and Nonideal Thermodynamic Effects on Performance of Gas-Lubricated Bearings
(The American Society of Mechanical Engineers (ASME), 2024)Small-scale turbomachinery operating at high rotational speed is a key technology for increasing the power density of energy and propulsion systems. A notable example is the turbine of an organic Rankine cycle turbogenerator ... -
On a New Cyclic Symmetry Formulation Accounting for Boundaries Undergoing Nonlinear Forces
(The American Society of Mechanical Engineers (ASME), 2024)Although cyclic symmetry theory was initially developed for linear structures, the introduction of nonlinear forces on internal nodes of the fundamental sector does not affect the methodology. Nevertheless, the method is ... -
Numerical Study of Low Engine Order Excitations Due to Manufacturing Variability Part II: An Efficient Approach for Stochastic Studies
(The American Society of Mechanical Engineers (ASME), 2024)In turbomachinery rows, the geometric variability between the airfoils induces nonuniformity in the flow, which directly translates into low engine order (LEO) excitation and vibration in the adjacent rows. Direct simulations ... -
Temperature Margin Calculation During Finite Element Creep Simulations
(The American Society of Mechanical Engineers (ASME), 2024)Creep deformation in turbomachinery applications is a highly nonlinear phenomenon where ±15 °C may halve or double the average rupture life. Even in well-controlled laboratory conditions, this stochastic nature means that ... -
Validation of the Numerical Simulation of Rotor/Stator Interactions in Aircraft Engine Low-Pressure Compressors
(The American Society of Mechanical Engineers (ASME), 2024)This contribution focuses on the validation of a numerical strategy developed jointly by Safran and Polytechnique Montréal for the simulation and the analysis of blade-tip/casing contact interactions in low-pressure ... -
Dynamic Performance and Control Analysis of a Supercritical CO2 Recuperated Cycle
(The American Society of Mechanical Engineers (ASME), 2024)Supercritical CO2 (sCO2) power cycles represent a promising technology for driving the energy transition. In fact, various research projects around the world are currently studying the possible applications of this technology, ... -
Multidisciplinary Surrogate-Based Optimization of a Compressor Rotor Blade Considering Ice Impact
(The American Society of Mechanical Engineers (ASME), 2024)Ice ingestion can lead to a range of detrimental effects, from diminished engine performance to potentially catastrophic failure, especially for the first compressor stages. As the ice is traveling through the engine, ... -
Residual Stress Optimization for Manufacturing of a Nozzle Guide Vane in Mar-M-509 by Laser Powder Bed Fusion
(The American Society of Mechanical Engineers (ASME), 2024)This paper delves into the potential of additive manufacturing (AM) technologies, focusing on the utilization of laser powder bed fusion (LPBF) to optimize the manufacturing process for Mar-M-509, a cobalt-based superalloy, ... -
A Static/Dynamic Coupled Harmonic Balance Method for Dry Friction Systems Containing Rigid Body Modes
(The American Society of Mechanical Engineers (ASME), 2024)A harmonic balance method for underconstrained dry friction systems containing rigid body modes (HBM-RBM) is proposed. This method aims to overcome the encountered obstacle when applying the harmonic balance method to ... -
Evaluation of Current and Future Aviation Fuels at High-Pressure Rich-Quench-Lean-Type Combustor Conditions
(The American Society of Mechanical Engineers (ASME), 2024)Decarbonizing the aviation sector is one of the biggest challenges to minimize climate change effects associated with carbon dioxide emission. Sustainable aviation fuels will play a major role in this context especially ... -
Numerical Investigation of Two-Phase Shock Waves in CO2 Flows Using a Modified Hertz–Knudsen Model
(The American Society of Mechanical Engineers (ASME), 2024)Understanding the complex behavior of two-phase shocks in CO2 flows is essential for a variety of applications, including carbon capture and storage () and transcritical refrigeration cycles. This study presents a comprehensive ... -
Burner and Flame Transfer Matrices of Jet-Stabilized Flames: Influence of Jet Velocity and Fuel Properties
(The American Society of Mechanical Engineers (ASME), 2024)To achieve the decarbonization of electrical power generation, gas turbines need to be upgraded to combust high-hydrogen content fuels reliably. One of the main challenges in this upgrade is the burner design. A promising ...