Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 221-240 of 9298
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Experimental Investigations on Carbon Segmented Seals With Smooth and Pocketed Pads
(The American Society of Mechanical Engineers (ASME), 2024)The present paper introduces experimental results for radial segmented seals operating at high rotating speed. These seals are made of three or more interlocking, carbon-graphite segments, in permanent contact with the ... -
Fatigue Failure of Steam Turbine Disks—A Centenary Tribute to Wilfred Campbell
(The American Society of Mechanical Engineers (ASME), 2024)The year 2024 marks one hundred years since Wilfred Campbell published his landmark work on vibrational analysis of rotating disk following a series of disk failures in steam turbines. Despite the absence of advanced ... -
Hydrogen Cofiring Demonstration at Constellation Hillabee Siemens Energy SGT6-6000G Power Plant
(The American Society of Mechanical Engineers (ASME), 2024)Gas turbines will need to reduce CO2 emissions and prove their flexibility based on market needs and new proposed rules. Economically, utilizing existing gas turbine assets to meet these requirements will be of great benefit ... -
Experimental Measurements of Buoyancy-Induced Flow in Rotating Cavities Under High Reynolds Number Conditions
(The American Society of Mechanical Engineers (ASME), 2024)The buoyancy-induced flow structure and heat transfer in rotating cavities is a well-known conjugate problem. The disk temperatures affect the flow and vice versa. This creates a challenging environment to study as it is ... -
The Effect of Air–Water Mixture on the Dynamic Response of a Hydrodynamic Journal Bearing With Inclined Grooves
(The American Society of Mechanical Engineers (ASME), 2024)Water-lubricated hydrodynamic journal bearings with deep inclined grooves are often used to support radial loads and dampen pump vibrations in nuclear power plants. The inclined grooves increase the pumping effect of the ... -
A Comparison of Model Predictive Control Architectures for Application to Electrified Aircraft Propulsion Systems
(The American Society of Mechanical Engineers (ASME), 2024)As electrified aircraft propulsion (EAP) systems continue to mature, more sophisticated hardware and software are being developed to balance operations among electric machines and gas-turbine engines. In hybrid-electric ... -
Investigation of Ammonia/Hydrogen Mixtures and Pilot-Split Strategies in a Laboratory-Scale Radial Swirl Combustor
(The American Society of Mechanical Engineers (ASME), 2024)The transition to a decarbonized energy future relies on identifying the most suitable alternative fuels that can meet the needs of various energy sectors. While both ammonia and hydrogen are zero-carbon energy vectors, ... -
Relationship Between Wavy Liquid Film Dynamics and Droplet Formation From Trailing Edge
(The American Society of Mechanical Engineers (ASME), 2024)Erosion of steam turbine blades due to coarse droplet impingement is a serious problem. The physical relationship is still elusive between the dynamics of wavy liquid film on a wall and the droplet dispersion from the ... -
Development of Detailed and Reduced Chemical Kinetic Models for Ammonia Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2024)The power generation sector has been recently moving toward decarbonization, and there is an increased interest in replacing conventional fossil fuels with fuels that produce reduced/zero carbon emissions. One such fuel ... -
A Keyphasor-Free Traveling Waves Analysis Method Based on Blade Tip Timing and Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2024)Vibration-induced high-cycle fatigue of blades is a prevalent issue in turbomachinery. Blade tip timing (BTT) emerges as a nonintrusive, promising method for assessing blade vibration. Despite its potential, BTT's inherent ... -
IndRNN-Based Data-Driven Modeling Integrated With Physical Knowledge for Engine Performance Monitoring
(The American Society of Mechanical Engineers (ASME), 2024)Monitoring the whole performance status of aircraft engines is of paramount importance for ensuring flight safety, control system, and prognostic health management. This work introduced an aircraft engine deep learning ... -
Experimental Investigation on Leakage and Frictional Heat Generation Characteristics of Low Hysteresis Brush Seals
(The American Society of Mechanical Engineers (ASME), 2024)Low hysteresis brush seals are frequently used in systems operating at a high speed in environments featuring a high temperature and pressure. The high-speed rotor comes into contact with the bottom end of the bristles of ... -
Numerical Investigation of the Flow Structure of Cryogenic Hydrogen in Corrugated Metal Flexhoses Due to Fluid–Structure Interactions
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, details of flow field characteristics and pressure drop of cryogenic hydrogen in corrugated metal flexhoses will be numerically evaluated using multiphase flow physics coupled with fluid–structure interactions. ... -
Development of High-Temperature, Interlaminar Tension Test Methodology for Ceramic Matrix Composites
(The American Society of Mechanical Engineers (ASME), 2024)This paper was to present how an affordable, high-temperature, interlaminar tension (ILT) strength testing method was explored and developed for ceramic matrix composites (CMCs), leading to development of a diametral-compression ... -
Pressure Gain Combustion for Gas Turbines: Analysis of a Fully Coupled Engine Model
(The American Society of Mechanical Engineers (ASME), 2024)The “Shockless Explosion Combustion” (SEC) concept for gas turbine combustors, introduced in 2014, approximates constant volume combustion (CVC) by harnessing acoustic confinement of auto-igniting gas packets. The resulting ... -
Performance Optimization of an Axial Compressor Using a Novel Multifidelity Surrogate Model Based on Flow Field Extraction
(The American Society of Mechanical Engineers (ASME), 2024)During the utilization of efficient optimization algorithms for axial compressors, the construction of a precise performance prediction surrogate model stands as a pivotal step. To reduce the cost of constructing the ... -
Sensitivity Analysis of the Static and Rotordynamic Characteristics on Geometric Parameters for a Supercritical Carbon Dioxide Hole-Pattern Damper Seal
(The American Society of Mechanical Engineers (ASME), 2024)Hole-pattern damper seal (textured stator with numerous circular-hole cavities and smooth rotor) is a typical annular damper seal that is gradually used in modern turbomachinery as a replacement of the conventional labyrinth ... -
Blade Excitation Alleviation of a Nozzleless Radial Turbine by Casing Treatment Based on Reduced-Order Model
(The American Society of Mechanical Engineers (ASME), 2024)High cycle fatigue (HCF) is the most common form of blade failure in nozzleless radial turbines. Current studies relating to blade vibration reduction focus on redesign of blade and volute geometries. These methods have ... -
Response of n-Heptane and Dodecane Swirl-Stabilized Spray Flames to Transverse Forcing Characterized by Flame Describing Functions Based on Downstream Acoustic Pressure or Velocity Signals
(The American Society of Mechanical Engineers (ASME), 2024)Predicting thermoacoustic instabilities in annular combustors requires knowledge of the impact of acoustic oscillations on heat release rate (HRR) oscillations. Flame describing functions (FDF) measured at the burner exit ... -
Understanding Environmental Barrier Coating Lifetimes and Performance for Industrial Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2024)Hydrogen or hydrogen blend fuels are expected to replace natural gas in land-based industrial gas turbines (IGTs) to support a greener power economy. Silicon carbide (SiC) base ceramic matrix composites (CMCs) are considered ...