Browsing Journal of Engineering for Gas Turbines and Power by Issue Date
Now showing items 1-20 of 9298
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High-Fidelity Energy Deposition Ignition Model Coupled With Flame Propagation Models at Engine-Like Flow Conditions
(The American Society of Mechanical Engineers (ASME), 1/10/2023 )With the heightened pressure on car manufacturers to increase the efficiency and reduce the carbon emissions of their fleets, more challenging engine operation has become a viable option. Highly dilute, boosted, and ... -
A Novel Yield Criterion for Nickel-Based Superalloys
(The American Society of Mechanical Engineers (ASME), 1/10/2023 )With the significant evolution of modern gas turbine engines, selection of high-temperature resistant alloys in the hot section is known to be the fundamental solution to enhance the capabilities of these engines. In ... -
Creep Analysis and Microstructural Evaluation of a Novel Additively Manufactured Nickel-Base Superalloy (ABD®-900AM)
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )Nickel-base superalloys containing 30 to 50% gamma prime (γ') volume fraction are typically used in hot section components (e.g., guide vanes or blades) for power generating gas turbines, and suitable time-dependent ... -
Performance Prediction Method for Forward Variable Area Bypass Injector of Variable Cycle Engine Based on Numerical Simulation
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )As an evolutional concept of aero engine, the variable cycle engine (VCE) can adjust the thermodynamic cycle via working on different modes to meet different flight missions. These working modes lead to the performance and ... -
Multi-Objective Optimization of Economy, Safety and Emissions for the Startup Scheduling of a Steam Turbine
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )With the rapid development of renewable energy, traditional power generation such as combined cycle unit needs to startup or change load quickly to balance the variability brought by renewable resources. In the combined ... -
Modal Identification for Integrally Bladed Rotors Under Traveling Wave Excitation
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )The safety of a fielded integrally bladed rotor (IBR) is often assessed through vibration testing. Responses due to various types of excitation are measured and processed and can be inputs to follow-on analyses, such as ... -
An Upgraded Chemical Kinetic Mechanism for Iso-Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )Iso-octane is widely recognized as a prominent candidate to represent the oxidation of iso-alkanes within jet fuel and gasoline surrogates. This work evaluated a chemical kinetic mechanism for iso-octane focusing on the ... -
Dynamic Characteristics of Rotor-Squeeze Film Damper-Support System Excited by Base Harmonic Excitations Using MHB-AFT Method
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )When operating at high speed, aeroengines mounted on the aircrafts also perform complicated maneuvering flights along with the aircrafts. The engine rotor systems will undergo forced motions excited by base movements and ... -
A Stepped Shaft Labyrinth Seal Verses A Pocket Damper Seal: Leakage and Dynamic Force Coefficients Under Wet Gas Operation
(The American Society of Mechanical Engineers (ASME), 10/19/2022)Modern turbomachinery favors pocket damper seals (PDS) which produce more effective damping than labyrinth seals (LS). Liquid tolerant compressors enable deep sea oil and gas (O&G) facilities; and seals supplied with ... -
Performance Optimization of Semi-Closed Oxy-Combustion Combined Cycle for Current and Future Blade Materials
(The American Society of Mechanical Engineers (ASME), 10/19/2022)Among the technologies for carbon capture and storage (CCS) from natural gas, oxy-turbine plants are a very promising solution thanks to the high efficiency, absence of stack, and nearly 100% capture rate. This paper ... -
Roller Bearing Skidding for Aero-Engine Applications: All-Steel Versus Hybrid Bearings
(The American Society of Mechanical Engineers (ASME), 10/19/2022)Roller bearings operating under light loads may suffer from skidding. The latter is more pronounced as the speed increases and may result in extensive wear and reduced service life of the bearing. The main objective of ... -
A Mechanistic Model for the Predictive Maintenance of Heavy-Duty Centrifugal Fans Operating With Dust-Laden Flows
(The American Society of Mechanical Engineers (ASME), 10/19/2022)Heavy-duty centrifugal fans are employed for the transport of dust-laden flows in industrial plants, for cement or steel production, or in energy production of plants and mine ventilation systems. These applications require ... -
From Pressure Time Series Data to Flame Transfer Functions: A Framework for Perfectly Premixed Swirling Flames
(The American Society of Mechanical Engineers (ASME), 10/19/2022)We present a two-step optimization (TSO) framework, which uses the pressure data of an unstable combustion process to estimate the complex-valued flame transfer function (FTF). From the pressure time series, we obtain the ... -
An Experimental Investigation on the Dynamic Response Variability of a Turbine Blade With Midspan Dampers
(The American Society of Mechanical Engineers (ASME), 10/19/2022)This paper addresses two main subjects. First, a novel test setup is described to experimentally study the nonlinear dynamic behavior of a turbine blade coupled with two midspan dampers (MSDs). To this end, a representative ... -
Nonlinear Dynamics of Turbine Generator Shaft Trains: Evaluation of Bifurcation Sets Applying Numerical Continuation
(The American Society of Mechanical Engineers (ASME), 10/19/2022)The nonlinear dynamics of turbine generator shaft trains for power generation are investigated in this paper. Realistic models of rotors, pedestals, and nonlinear bearings of partial arc and lemon bore configuration are ... -
Axial Compressor Map Generation Leveraging Autonomous Self-Training Artificial Intelligence
(The American Society of Mechanical Engineers (ASME), 10/19/2022)The paper describes the study performed by SoftInWay in the scope of the Phase I SBIR project funded by the National Aeronautics and Space Administration (NASA). The project was dedicated to a study of optimization of the ... -
High-Frequency Mode Shape Dependent Flame-Acoustic Interactions in Reheat Flames
(The American Society of Mechanical Engineers (ASME), 10/20/2022)Gas turbines featuring sequentially staged combustion systems offer excellent performance in terms of fuel flexibility, part load performance and combined-cycle efficiency. These reheat combustion systems are therefore a ... -
Static and Rotordynamic Characteristics for Supercritical Carbon Dioxide Spiral Groove Dry Gas Seal With the Tilted Seal Ring
(The American Society of Mechanical Engineers (ASME), 10/20/2022)Supercritical carbon dioxide (SCO2) Brayton cycle has been widely used as a substitute for traditional steam cycles. As one of the key components of power-dense turbomachines, dry gas seal (DGS) has been considered one of ... -
Hysteresis and Bistability in Transversely Excited Swirling Flows
(The American Society of Mechanical Engineers (ASME), 10/21/2022)We investigate the effect of transverse acoustic excitation on nonreacting swirling jets. The work is motivated by the azimuthal instabilities in annular gas turbine combustor which are one of the major challenges in ... -
Application of Machine Learning to Forced Response Predictions of an Industrial Axial Compressor Rotor Blade
(The American Society of Mechanical Engineers (ASME), 10/21/2022)Machine learning has gone way beyond a ground-breaking technology a few decades ago to now taken for granted in many day-to-day activities. It is now providing new ways for manufacturing, assembling, operating, monitoring, ...