YaBeSH Digital Library: Recent submissions
Now showing items 13881-13900 of 316660
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Working Fluid Selection and Thermodynamic Optimization of the Novel Renewable Energy-Based RESTORE Seasonal Storage Technology
(The American Society of Mechanical Engineers (ASME), 2024)Seasonal-based energy storage is expected to be one of the main options for the decarbonization of the space heating sector by increasing the renewables dispatchability. Technologies available today are mainly based on hot ... -
Application of Numerical Bifurcation Tracking Strategy to Blade-Tip/Casing Interactions in Aircraft Engines
(The American Society of Mechanical Engineers (ASME), 2024)Building on the regularized-Lanczos harmonic balance method (RL-HBM), a previously developed frequency method, this paper presents a numerical bifurcation tracking strategy dedicated to high-dimensional nonlinear mechanical ... -
Particulate Characterization and Lubricating Oil Tribology Investigations of a Gasoline Compression Ignition Engine Using Low Octane Fuels
(The American Society of Mechanical Engineers (ASME), 2024)High compression ratio and lean-burn operation of low-octane gasoline-fueled compression ignition engines lead to significantly higher thermal efficiencies. Hence, it has emerged as a potential technology to propel medium ... -
Prediction and Analysis of Transient Turbine Tip Clearance Using Long Short-Term Memory Neural Network
(The American Society of Mechanical Engineers (ASME), 2024)The transient turbine tip clearance (δ) throughout the engine process is crucial to modern high-performance aero engines. However, there is still a lack of efficient and accurate transient prediction models of tip clearances ... -
Numerical Analysis of High Frequency Transverse Instabilities in a Can-Type Combustor
(The American Society of Mechanical Engineers (ASME), 2024)Dry low emissions (DLE) systems are well-known to be susceptible to thermoacoustic instabilities. In particular, transverse, spinning modes of high frequency may appear, and lead to severe damage in a matter of seconds. ... -
Analysis of Unburned Methane Emission Mechanisms in Large-Bore Natural Gas Engines With Prechamber Ignition
(The American Society of Mechanical Engineers (ASME), 2024)Although precombustion chambers, or prechambers, have long been employed for improving large-bore two-stroke natural gas engine ignition and combustion stability, their design predates modern analysis techniques. Employing ... -
Gas Turbine's Role in Energy Transition
(The American Society of Mechanical Engineers (ASME), 2024)Modern heavy duty industrial gas turbines in combined cycle configuration, with rated efficiencies (at ISO base load) above 60% net LHV, are expected to play a significant role in reducing the carbon footprint of utility ... -
Integrated Hybrid Engine Cycle Design and Power Management Optimization
(The American Society of Mechanical Engineers (ASME), 2024)A novel integrated gas turbine cycle design and power management optimization methodology for parallel hybrid electric propulsion architectures is presented in this paper. The gas turbine multipoint cycle design method is ... -
Analysis of In-Cylinder Flow in a Small-Bore Spark-Ignition Engine Using Computational Fluid Dynamics Simulations and Zero-Dimensional-Based Modeling
(The American Society of Mechanical Engineers (ASME), 2024)The evolution of in-cylinder flow involves large- and small-scale structures during the intake and compression strokes, significantly influencing the fuel–air mixing and combustion processes. Extensive research has been ... -
The Effect of Swirl Number on Lean Blow Out Limits of Lean Direct Injection Combustors
(The American Society of Mechanical Engineers (ASME), 2024)This is the first study where a single variable sweep of SN is conducted to assess its impact on lean blowout limits (LBO) in a liquid-fueled lean direct injection (LDI) combustor. This study uses a scaled NASA SV-LDI ... -
A Multistage Nonlinear Method for Aeroengine Health Parameter Estimation Based on Adjacent Operating Points
(The American Society of Mechanical Engineers (ASME), 2024)Health parameter estimation is the core of engine gas path analysis (GPA), which is widely adopted for engine safety improvement, as well as for operation and maintenance cost reduction. The major challenge of GPA lies in ... -
Vibration Characteristics Investigation of Hard-Coated Mistuned Blisk With Multipackets by Lumped Parameter Model
(The American Society of Mechanical Engineers (ASME), 2024)To improve the performance and reduce the vibration of the mistuned blisk, a novel approach combining hard-coating and multipackets is presented. First, the dynamical models of the blisk without hard-coating and multipackets, ... -
Multidisciplinary Design Methodology for Micro-Gas-Turbines—Part II: System Analysis and Optimization
(The American Society of Mechanical Engineers (ASME), 2024)Owing to their high specific energy capabilities, ultramicrogas turbines (UMGT) are a high-potential technology to provide portable electric power supply for applications with demand of less than 1 kW. UMGT conceptual ... -
Enhancing Efficiency in Collision Avoidance: A Study on Transfer Reinforcement Learning in Autonomous Ships’ Navigation
(The American Society of Mechanical Engineers (ASME), 2024)Collision avoidance in ships and robotic vehicles exemplifies a complex work process that necessitates effective scenario recognition and precise movement decision-making. Machine learning methods addressing such work ... -
Multidisciplinary Design Methodology for Micro-Gas-Turbines—Part I: Reduced Order Component Design and Modeling
(The American Society of Mechanical Engineers (ASME), 2024)Ultramicrogas turbines (UMGTs) for electric power generation up to 1 kW are a viable replacement technology for lithium batteries in drones due to their high energy density. Previous research has shown that small-scale ... -
Evaluation of Extreme Value Predictions for Unsteady Flow Distortion of Aero-Engine Intakes
(The American Society of Mechanical Engineers (ASME), 2024)Unsteady flow distortion is of interest for the development of air-breathing propulsion systems. Stochastic fluctuations can generate incompatibilities between intakes and aero-engines. Observing the extreme flow distortion ... -
Cooled Spray Technology for Particulate Reduction in a Heavy-Duty Engine
(The American Society of Mechanical Engineers (ASME), 2024)Cooled spray (CS) technology passively reduces particulate matter (PM) emissions from diesel engines compared to non-CS-equipped diesel engines. CS inserts are mounted near the injector nozzle and control mixing so that ... -
Development and Evaluation of Generic Test Pieces for Creep Property Assessment of Laser Powder Bed Fusion Components
(The American Society of Mechanical Engineers (ASME), 2024)Metal laser powder bed fusion (PBF-LB/M) allows for high degrees of design freedom and the manufacture of high-temperature Ni-based materials, such as IN738LC. The PBF-LB/M microstructure is dependent on several factors, ... -
Modeling Ammonia-Hydrogen-Air Combustion and Emission Characteristics of a Generic Swirl Burner
(The American Society of Mechanical Engineers (ASME), 2024)The combustion process of both pure NH3 and a NH3/H2 fuel blends is here analyzed using two kinetics processors, i.e., Chemkin-Pro-and CANTERA: detailed kinetic mechanisms have been tested and compared in terms of laminar ... -
Oxygen Storage Incorporated Into Net Power and the Allam–Fetvedt Oxy-Fuel sCO2 Power Cycle—Techno-Economic Analysis
(The American Society of Mechanical Engineers (ASME), 2024)With the planned future reliance on variable renewable energy, the ability to store energy for prolonged time periods will be required to reduce the disruption of market fluctuations. This paper presents a method to analyze ...