Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 581-600 of 9564
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Using Machine Learning Tools for Rotating Stall Warning in a Contra-Rotating Compressor
(The American Society of Mechanical Engineers (ASME), 2024)This paper takes a low-speed axial contra-rotating compressor as the experimental object, and the sensor array is used to collect the pressure sequences in stall conditions for different speed configurations. These pressure ... -
Combustion and Emission Characteristics of an Ammonia Microgas Turbine Combustor With a Twin-Fluid Atomizer
(The American Society of Mechanical Engineers (ASME), 2024)In this study, combustion and emission characteristics in the test rig of microgas turbine with liquid ammonia fuel injection using the twin-fluid atomizers (TFAs) are investigated and compared with the previous result ... -
On the Performance of Variable-Geometry Ducted E-Fans
(The American Society of Mechanical Engineers (ASME), 2024)Electrically driven ducted fans (e-fans), either underwing-mounted or located at the aft-fuselage, can potentially improve the system overall efficiency in hybrid-electric propulsion architectures by increasing their thrust ... -
Modeling and Experimental Validation of Prechamber Jet Penetration Considering Jet Density and Ejection Pressure Variations
(The American Society of Mechanical Engineers (ASME), 2024)Although prechamber (PC) is regarded as a promising solution to enhance ignition in lean-burn gas engines, a lack of comprehensive understanding of PC jet penetration dynamics remains. This study proposed a zero-dimensional ... -
Experimental and Numerical Investigation of Dynamic Vibration Absorber Array for Vibration Mitigation of Integral Blisk
(The American Society of Mechanical Engineers (ASME), 2024)Dynamic vibration absorber array (DVAA) is a promising technique for vibration mitigation of integral blisk. In this paper, the effectiveness of the DVAA method is experimentally validated on a piezoelectric actuators-driven ... -
Prediction of Soot in a Rich–Quench–Lean Burner Using a Semidetailed JetA-1 Chemistry
(The American Society of Mechanical Engineers (ASME), 2024)This work proposes a methodology to include accurate kinetics for soot modeling taking into account real fuel complexity in large eddy simulation (LES) of aeronautical engines at a reasonable computational cost. The ... -
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 ...