YaBeSH Digital Library: Recent submissions
Now showing items 10521-10540 of 316660
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Application of an Improved Workflow for the Identification of Flame Dynamics to Swirl-Stabilized Wet Combustion
(The American Society of Mechanical Engineers (ASME), 2024)The estimation of flame transfer functions (FTF) from time series data generated by large eddy simulation (LES) via system identification (SI) is an important element of thermoacoustic analysis. A continuous time series ... -
Development of Large-Diameter Hybrid Film-Riding Seals for Supercritical Carbon Dioxide Turbines
(The American Society of Mechanical Engineers (ASME), 2024)Compared to traditional labyrinth seals, large-diameter (about 24 in or 609.6 mm) film-riding face seals are worth 0.55–0.65% points efficiency for utility-scale supercritical carbon dioxide (sCO2) turbines. Conventional ... -
Dynamic Response of a Rotor Supported on Hybrid Bearings in Air, Water, and Liquid Nitrogen: Measurements and Comparisons to Predictions
(The American Society of Mechanical Engineers (ASME), 2024)Modern liquid rocket engine turbopumps implement hybrid bearings, which combine hydrostatic and hydrodynamic fluid film principles, in compact and lightweight units known for their superior reusability, durability, and ... -
Physical Reservoir Computing in a Music Hall Experiment
(The American Society of Mechanical Engineers (ASME), 2024)Music is a complex vibratory structure that evolves temporally and, while it has been studied for centuries, both quantitatively and qualitatively, it has seldom been studied under the lens of computer science and information ... -
Rectangular Bismuth Oxychloride With High Mid-Wave Infrared Reflectance to Strengthen Radiative Cooling Performance
(The American Society of Mechanical Engineers (ASME), 2024)Radiative cooling materials (RCMs) based on polymers, which reflect solar irradiance (0.24–2.5 μm) strongly and emit radiation within atmospheric window (8–13 μm) intensively, have yielded obvious cooling performance. ... -
Design and Manufacture of SiC/SiC Nozzle Guide Vanes With Environmental Barrier Coatings for High-Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2024)Increasing the efficiency of jet engines is essential to meet the demanded climate targets. Ceramic matrix composites (CMCs) are strong candidates for aircraft applications because they withstand high temperatures, while ... -
A High-Temperature, High-Speed, Oil-Free Syngas Compressor for Small-Scale Combined Heat and Power
(The American Society of Mechanical Engineers (ASME), 2024)For low-emission, small-scale combined heat and power generation, integrating a biomass gasifier with a downstream solid oxide fuel cell system is very promising due to their similar operating conditions in terms of ... -
Compressor Surge Identification in Innovative Heat-Pump Systems Equipped by Vaned Diffuser Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2024)In the present energy scenario, heat pumps (HPs) are assuming an important role to improve energy efficiency in reversible cooling systems. In particular, in case of industrial size plants, centrifugal compressors are ... -
Analysis and Optimization of the Fatigue Damage Accumulation Under Transient Vibrations of Mistuned Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2024)This paper develops an efficient method for calculations of stress levels, accumulation of high-cycle fatigue (HCF), and mistuning optimization aimed at the reduction of the fatigue damages for mistuned bladed disks under ... -
On the Optimum Distribution of Multiple Helmholtz Resonators for Annular Combustors
(The American Society of Mechanical Engineers (ASME), 2024)The combustors of many modern land-based gas turbines and aero-engines are annular. This kind of combustors often suffer from thermoacoustic oscillations, with the occurrence of mostly the circumferential first-order, ... -
Investigation of Viscor and Methanol Spray Dynamics Using Proper Orthogonal Decomposition in Siemens Energy Industrial Atomizers
(The American Society of Mechanical Engineers (ASME), 2024)The demand to reduce carbon emissions has prompted research into alternative fuels that can replace conventional fuels like diesel in industrial gas turbines. Among different potential biofuels and e-fuels, methanol emerges ... -
Optimal Control Allocation for Distributed Electric Propulsion in a Series/Parallel Partial Hybrid Powertrain
(The American Society of Mechanical Engineers (ASME), 2024)The SUbsonic Single Aft eNgine (SUSAN) Electrofan is a National Aeronatics and Space Administration (NASA) concept transport aircraft representative of technology anticipated for a 2040 entry-into-service date. The powertrain ... -
Investigation of the Sigma Approximation Technique for the Solution of the Time Spectral Equation System
(The American Society of Mechanical Engineers (ASME), 2024)The time spectral method (TSM) is commonly utilized to analyze periodic unsteady flows within turbomachines. However, the time spectral solutions in regions with large temporal and spatial gradients, such as wakes, shocks, ... -
Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning
(The American Society of Mechanical Engineers (ASME), 2024)This study presents data-driven modeling of the Reynolds stress tensor and turbulent heat flux vector for improving unsteady Reynolds-averaged Navier–Stokes (RANS) predictions of natural convection problems. While RANS-based ... -
Robust Controller Development Via Iterative Model Updating for Active Magnetic Bearing Rotor Systems
(The American Society of Mechanical Engineers (ASME), 2024)Modern turbomachinery equipped with active magnetic bearings (AMBs) requires increasingly high-performance controllers to ensure safe and efficient operations. These controllers are typically tuned based on frequency ... -
Extension of Hamiltonian Mechanics to Non-Conservative Systems Via Higher-Order Dynamics
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents a detailed review of the emerging topic of higher-order dynamics and their intrinsic variational structure, which has enabled—for the very first time in history—the general application of Hamiltonian ... -
Investigating the Impact of Steam Enhancement on Combustion in a Swirl-Assisted Jet-Stabilized Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2024)A newly developed gas turbine combustor system based on the swirl-assisted jet-stabilized concept using Jet A-1 and natural gas as reference fuel is tested under wet conditions to evaluate its combustion characteristics ... -
Numerical Investigation on Tip Clearance Leakage Control for a Radial Turbine With Tip Control Holes
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, a novel tip clearance control structure, the tip control hole (TCH), is proposed, which is appropriate for the radial turbines with the characteristics of low manufacturing cost, thin blade, insufficient tip ... -
Experimental Demonstration of a Topology Optimization Method to Generate a Capacity-Specific Device With Cavitation Resistance for Control Valve Applications
(The American Society of Mechanical Engineers (ASME), 2024)Topology optimization (TO) is a powerful method of generating structures that have desirable functional performance, to date most commonly used to improve structural behavior or to optimize pressure drops in laminar flow ... -
An Actuator-Disk Model Augmentation for Low-Pressure Axial Fan Simulation
(The American Society of Mechanical Engineers (ASME), 2024)Actuator-disk rotor models are important simulation tools for cost-effective industrial axial fan system analysis. Actuator-disk fan model performance, however, is constrained by the conventional use of two-dimensional ...