Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 901-920 of 9564
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Experimental Determination of Blade Tip Rub Forces in a Multiblade System
(The American Society of Mechanical Engineers (ASME), 2022)As improved efficiency goals require ever smaller gaps between rotating turbomachinery blade tips and stationary outer casings, it becomes more important to understand the physics of what happens when a blade tip rubs ... -
Demonstration of Natural Gas and Hydrogen Cocombustion in an Industrial Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2022)Hydrogen cofiring in a gas turbine is believed to cover an energy transition pathway with green hydrogen as a driver to lower the carbon footprint of existing thermal power generation or cogeneration plants through the ... -
Stabilization of Auto-Igniting Flames Within a Gas Turbine Sequential Combustor, Through the Control of Static Temperature Variation—Detailed Numerical Investigation
(The American Society of Mechanical Engineers (ASME), 2022)Axially staged combustion systems offer both enhanced operability and fuel flexibility for gas turbines, allowing stable operation and low emissions across a wide range of engine loads. The sequential combustion concept, ... -
A Gray Target Calculation–Cloud Gravity Center Health Assessment Method for Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2022)Since the health status of gas turbine engine is difficult to quantify, which brings great challenges to health assessment and remaining useful life predictions. To solve this problem, a gray target calculation and cloud ... -
Next Generation Air Plasma Spray Porous Thermal Barrier Coatings for Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2022)Modern gas turbine combustors rely on thermal barrier coatings (TBC) in addition to sophisticated cooling strategies to survive high temperature environments. The need for lower emissions either driven by International ... -
Stability Analysis of an Industrial Blade Accounting for a Blade-Tip/Casing Nonlinear Interface
(The American Society of Mechanical Engineers (ASME), 2022)This paper investigates the local stability analysis of periodic solutions corresponding to the nonlinear vibration response of an industrial compressor blade, NASA rotor 37, on which are applied different types of ... -
Experimental Ignition Delay Time Measurements and Chemical Kinetics Modeling of Hydrogen/Ammonia/Natural Gas Fuels
(The American Society of Mechanical Engineers (ASME), 2022)In recent years, hydrogen-carrying compounds have accrued interest as an alternative to traditional fossil fuels due to their function as zero-emission fuels. As such, there is interest in investigating hydrogen-carrying ... -
Correlations for the Performance, Efficiency, and Energy Losses for Single Cylinder, Four-Cycle Internal Combustion Engines With Displaced Volumes Ranging From 40 to 200 cc
(The American Society of Mechanical Engineers (ASME), 2023)Five commercial-off-the-shelf (COTS) engines ranging from 40 to 200 cc were tested as potential power plants for Group Two RPAs. The maximum brake power ranged from 1.8 to 5.0 kW. Of the five engines, two were designed for ... -
A Comparison of Static and Rotordynamic Characteristics for Three Types of Impeller Front Seals in a Liquid Oxygen Turbopump
(The American Society of Mechanical Engineers (ASME), 2022)Annular seals are widely used to minimize the leakage, and improve efficiency and rotordynamic stability in turbomachinery. In a liquid oxygen turbopump, the operating conditions of annular seals are harsher with the ... -
Detection of the Onset of Trip Symptoms Embedded in Gas Turbine Operating Data
(The American Society of Mechanical Engineers (ASME), 2022)One of the most disrupting events that affect gas turbine (GT) operation is trip, since its occurrence reduces machine life span and also causes business interruption. Thus, early detection of incipient symptoms of GT trip ... -
Investigation of Adaptive Mesh Refinement on an Industrial Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2022)An adaptive mesh refinement (AMR) method is demonstrated for Large Eddy Simulations (LES) of an industrial gas turbine combustor, the SGT-100 provided by Siemens Energy Industrial Turbomachinery Ltd. In this paper, the ... -
Symmetry Breaking in an Experimental Annular Combustor Model With Deterministic Electroacoustic Feedback and Stochastic Forcing
(The American Society of Mechanical Engineers (ASME), 2022)In this study, we use an annular combustor experimental model with electroacoustic feedback to investigate systematically the effect of stochastic forcing and nonuniform flame response distribution on azimuthal thermoacoustic ... -
Machine-Learning Clustering Methods Applied to Detection of Noise Sources in Low-Speed Axial Fan
(The American Society of Mechanical Engineers (ASME), 2022)The integration of rotating machineries in human-populated environments requires to limit noise emissions, with multiple aspects impacting on control of amplitude and frequency of the acoustic signature. This is a key issue ... -
A New Approach to Estimate Particulate Matter Emissions From Ground Certification Data: The nvPM Mission Emissions Estimation Methodology
(The American Society of Mechanical Engineers (ASME), 2022)Estimating nonvolatile particulate matter (nvPM)—or black carbon—emissions during an aircraft mission is extremely challenging because of the lack of reliable data in flight. For this reason, a detailed study has been ... -
An Experimental Investigation of Supercritical Methane Injection Characteristics in a CO2 Environment
(The American Society of Mechanical Engineers (ASME), 2022)Clean energy generation is gaining significant attention from industries, academia, and governments across the globe. The Allam cycle is one such technology that has been under focus due to its efficiency, environmental ... -
Design Optimization of a High-Speed Twin-Stage Compressor for Next-Gen Aircraft Environmental Control System
(The American Society of Mechanical Engineers (ASME), 2022)The environmental control system (ECS) is the largest auxiliary power consumer, i.e., around 75% of non-propulsive power, among the aircraft subsystems. The adoption of a novel ECS architecture, based on an electrically-driven ... -
Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V
(The American Society of Mechanical Engineers (ASME), 2022)Very high cycle fatigue (VHCF) data and experiments, 107–109 cycles to failure, have traditionally been both a cumbersome and costly task to perform. However, characterizing VHCF behavior of material systems is critical ... -
Flame Transfer Functions for Turbulent, Premixed, Ammonia-Hydrogen-Nitrogen-Air Flames
(The American Society of Mechanical Engineers (ASME), 2022)Ammonia is a promising hydrogen and energy carrier but also a challenging fuel to use in gas turbines, due to its low flame speed, limited flammability range, and the production of NOx from fuel-bound nitrogen. Previous ... -
Assessing the Structural Integrity of Plasma-Sprayed Multilayer Thermal Barrier Coatings
(The American Society of Mechanical Engineers (ASME), 2022)The majority of lifetime models associate the failure of thermal barrier coatings (TBCs) to oxidation of the bond coat (BC). A thickening of the thermally grown oxide (TGO) leads to a conversion of stresses at the undulated ... -
Influence of Different Flow Solvers and Off-Design Conditions on the Determination of Fan-Rotor Wakes for Broadband Noise Prediction
(The American Society of Mechanical Engineers (ASME), 2022)The acoustic interaction of fan-rotor wakes with the downstream stator vanes is considered as an important noise source of an aircraft engine. The turbulence induced by the rotor generates a stochastic acoustic source that ...