Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 321-340 of 9298
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Thermodynamic Optimization of Load-Following Operation in a Decarbonized Combined Cycle Power Plant Under Net-Zero Scenarios
(The American Society of Mechanical Engineers (ASME), 2024)Postcombustion capture (PCC) by means of mono-ethanolamine and hydrogen co-firing, combined with exhaust gas recirculation (EGR), were applied to a typical 2 × 1 combined cycle (CC) with the goal of reaching net-zero CO2 ... -
Local Surrogate Modeling for Spatial Emulation of Gas-Turbine Combustion Via Similarity-Based Sample Processing
(The American Society of Mechanical Engineers (ASME), 2024)This work proposes an accurate and efficient surrogate modeling method for predicting combustion field in a gas-turbine combustor. The method integrates proper orthogonal decomposition-based dimensional reduction, and ... -
Swirler Design Parameter Impact on Lean Blowout, Pressure Loss, and Flame Liftoff
(The American Society of Mechanical Engineers (ASME), 2024)Swirl stabilized combustion is a common technique used in gas turbine engine combustors and is accomplished by introducing swirl into the inlet flow, which enhances mixing and stabilizes the combustion event. Coaxial ... -
Off-Equilibrium Linearization-Based Control of Nonlinear Time-Delay System and Application to a Turbofan Engine
(The American Society of Mechanical Engineers (ASME), 2024)Turbofan engines exhibit pronounced nonlinearity due to component characteristics and thermal processes, necessitating linearization to connect engine control with linear control theory. Off-equilibrium linearization offers ... -
Numerical Investigations of Flows and Heat Transfer in Turbine Disk Cavities
(The American Society of Mechanical Engineers (ASME), 2024)In gas turbines, the stator wells play a key role in the efficiency of the turbomachine. The research for performance gains requires a good understanding and an accurate modeling of the flows and heat transfers occurring ... -
Dynamic Modeling and Experimental Modal Analysis for the Central Rod-Fastened Rotor With Hirth Couplings Based on Fractal Contact Theory
(The American Society of Mechanical Engineers (ASME), 2024)The central rod-fastened rotor of gas turbine exhibits pronounced noncontinuous characteristics due to the large number of contact interfaces between the compressor and turbine disks. It is necessary to establish an accurate ... -
Characteristics of Laminar Separation Bubble With Varying Leading-Edge Shapes and Deflections of the Trailing-Edge Flap
(The American Society of Mechanical Engineers (ASME), 2024)A series of implicit large eddy simulations (ILES) is carried out to examine the characteristics of a leading edge (LE) separation bubble. The test case comprises a flat plate with an elliptic leading edge (ELE), which is ... -
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 ... -
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 ... -
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 ...