Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 161-180 of 9298
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Development of a Method for Shape Optimization for a Gas Turbine Fuel Injector Design Using Metal-Additive Manufacturing
(The American Society of Mechanical Engineers (ASME), 2024)Adjoint shape optimization has enabled physics-based optimal designs for aerodynamic surfaces. Additive manufacturing (AM) makes it possible to manufacture complex shapes. However, there has been a gap between optimal and ... -
Teaching Aero-Engine Performance: From Analytics to Hands-On Exercises Using Gas Turbine Performance Software
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, we present an approach for teaching turbojet engine performance that combines mathematical analysis with the use of performance software to provide students with a comprehensive and in-depth understanding ... -
Forced Response of Rotating Blisks: Prediction and Correlation to Blade Tip-Timing Measurements
(The American Society of Mechanical Engineers (ASME), 2024)This paper explores two different blisk dynamic models for resonant vibration prediction of a rotating blisk test piece, i.e., the Model-BDTID and geometrically mistuned models (GMM). The former represents a mistuned blisk ... -
Performance Analysis of a Self-Decarbonizing Combustor
(The American Society of Mechanical Engineers (ASME), 2024)Hydrogen is envisioned to be a key decarbonization solution for fossil fuel-dependent power generation and aviation industries. At present, a significant fraction of the generated electrical power is derived from natural ... -
Analysis of Thermo-Acoustic Instabilities Induced by Hydrogen Swirling Flames
(The American Society of Mechanical Engineers (ASME), 2024)A considerable research effort has been concerned combustion dynamics of systems fed with hydrocarbon fuels. The case of pure hydrogen/air flames deserves to be specifically considered because hydrogen is highly reactive, ... -
Global Stability and Forced Response Analysis of Swirling Flows in Aviation Combustors
(The American Society of Mechanical Engineers (ASME), 2024)Swirling jets are canonical flow fields used to stabilize flames in many gas-turbine combustion systems. These flows amplify background acoustic disturbances and perturb the flame, producing combustion noise and potentially ... -
Temperature Dependence of Aerated Turbine Lubricating Oil Degradation From a Lab-Scale Test Rig
(The American Society of Mechanical Engineers (ASME), 2025)Operational, efficiency, safety, and economic issues may arise from the formation and accumulation of sludge, varnish, and coke deposits that result from the degradation of engine lubricants through oxidation or thermal ... -
Tool Wear Prediction in Broaching Based on Tool Geometry
(The American Society of Mechanical Engineers (ASME), 2024)The aircraft engine is a safety-critical part of an aircraft. Constructive modifications resulting in ecological and economic improvements of the engine lead to necessary changes in manufacturing processes. The turbine ... -
Multidimensional Modeling of Mixture Formation in a Hydrogen-Fueled Heavy-Duty Optical Engine With Direct Injection
(The American Society of Mechanical Engineers (ASME), 2025)Hydrogen (H2), as a carbon-free fuel, is considered as one of the most promising solutions to reduce the carbon footprint of hard-to-decarbonize energy and transportation sectors. As such, hydrogen-fueled internal combustion ... -
Comprehensive Life Cycle Analysis of Diverse Hydrogen Production Routes and Application on a Hydrogen Engine
(The American Society of Mechanical Engineers (ASME), 2025)In the effort of achieving net-zero greenhouse gas (GHG) emissions, hydrogen is becoming increasingly relevant in several sectors such as automotive, cogeneration, maritime, off-road, and railroad. However, hydrogen can ... -
An Experimental Comparison of Methanol Combustion Strategies: Spark Ignition Versus Compression Ignition
(The American Society of Mechanical Engineers (ASME), 2025)Methanol has garnered significant attention over the past few years due to its potential as a hydrogen carrier in a future green economy. As a result, it is a leading candidate to displace fossil fuels in the transportation ... -
Effect of Blending Ammonia With Natural Gas Hydrocarbons on the Performance of a Heavy-Duty Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2025)Ammonia (NH3) is a promising carbon-free fuel candidate to replace conventional petroleum-based fuels. However, NH3 has low flame speed, low calorific value, narrow flammability limits, and requires high ignition energy. ... -
The Impact of Different Equilibrium Hypotheses on the Nonlinear Response of Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2025)Underplatform dampers (UPDs) are widely used in bladed disks to mitigate blades' vibration amplitude. Such devices introduce localized nonlinearities, whose modeling requires nonlinear solution techniques. When the harmonic ... -
Metallurgical Investigation and Failure Analysis in GTD-111 Stage 2 Buckets From an Industrial F-Class Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2025)A utility experienced cracking in multiple stage 2 buckets (S2Bs) in a large F-class power generation gas turbine after only 7348 h and 31 starts following a standard repair and rejuvenation heat treatment cycle. The blades ... -
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 ...