Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1501-1520 of 9564
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Conditioning of Leakage Flows in Gas Turbine Rotor–Stator Cavities
(The American Society of Mechanical Engineers (ASME), 2021)Ingress is the penetration of hot mainstream fluid into the cavity formed between the turbine disk (rotor) and its adjacent casing (stator). Gas turbine engine designers use rim-seals fitted at the periphery of the disks, ... -
Assimilation of Experimental Data to Create a Quantitatively Accurate Reduced-Order Thermoacoustic Model
(The American Society of Mechanical Engineers (ASME), 2021)We combine a thermoacoustic experiment with a thermoacoustic reduced order model using Bayesian inference to accurately learn the parameters of the model, rendering it predictive. The experiment is a vertical Rijke tube ... -
On the Mechanism of Spike Stall Inception and Near Stall Nonsynchronous Vibration in an Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2021)The aerodynamic and aeroelastic behavior of an engine-like transonic compressor stage is investigated in this paper. Simulations were carried out for the transonic compressor at the Technical University of Darmstadt using ... -
New Insights From Conceptual Design of an Additive Manufactured 300 W Microgas Turbine Toward Unmanned Aerial Vehicle Applications
(The American Society of Mechanical Engineers (ASME), 2021)Owing to the high energy density of hydrocarbon fuels, ultramicrogas turbines (UMGT) with power outputs below 1 kW have clear potential as battery replacement in drones. However, previous works on gas turbines of this scale ... -
Optimal Control of a Compound Rotorcraft for Engine Performance Enhancement
(The American Society of Mechanical Engineers (ASME), 2021)Demands for rotorcraft with increased flight speed, improved operational performance and reduced environmental impact have led to a drive in research and development of alternative concepts. Compound rotorcraft overcome ... -
Combined Numerical and Experimental Study on the Use of Gurney Flaps for the Performance Enhancement of NACA0021 Airfoil in Static and Dynamic Conditions
(The American Society of Mechanical Engineers (ASME), 2021)Power augmentation devices in wind energy applications have been receiving increasing interest from both the scientific and the industrial community. In particular, Gurney flaps (GFs) showed a great potential thanks to the ... -
Aero Engine Concepts Beyond 2030: Part 3—Experimental Demonstration of Technological Feasibility
(The American Society of Mechanical Engineers (ASME), 2021)Recognizing the attention currently devoted to the environmental impact of aviation, this three-part publication series introduces two new aircraft propulsion concepts for the timeframe beyond 2030. The first part focuses ... -
Aero Engine Concepts Beyond 2030: Part 2—The Free-Piston Composite Cycle Engine
(The American Society of Mechanical Engineers (ASME), 2021)Recognizing the attention currently devoted to the environmental impact of aviation, this three-part publication series introduces two new aircraft propulsion concepts for the timeframe beyond 2030. This second part presents ... -
Aero Engine Concepts Beyond 2030: Part 1—The Steam Injecting and Recovering Aero Engine
(The American Society of Mechanical Engineers (ASME), 2021)Recognizing the attention currently devoted to the environmental impact of aviation, this three-part publication series introduces two new aircraft propulsion concepts for the timeframe beyond 2030. This first part focuses ... -
Aeromechanical Analysis of a Complete Wind Turbine Using Nonlinear Frequency Domain Solution Method
(The American Society of Mechanical Engineers (ASME), 2021)The high-fidelity computational fluid dynamics (CFD) simulations of a complete wind turbine model usually require significant computational resources. It will require much more resources if the fluid–structure interactions ... -
An Experimental and Computational Investigation of a Pulsed Air-Jet Excitation System on a Rotating Bladed Disk
(The American Society of Mechanical Engineers (ASME), 2021)Nonsynchronous vibrations are a difficult problem to address for turbomachines due to the complex nature of the forcing. Such vibrations can be caused by vortex shedding, flow instabilities, stall cells, or flutter. Testing ... -
A High-Fidelity Modeling Tool to Support the Design of Oxy-Combustors for Direct-Fired Supercritical CO2 Cycles
(The American Society of Mechanical Engineers (ASME), 2021)The challenge in the design of oxy-combustors for direct-fired supercritical CO2 (sCO2) cycles is in addressing disparate performance metrics and objectives. Key design parameters to consider include, among others, injector ... -
Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures
(The American Society of Mechanical Engineers (ASME), 2021)With the increasing demand of the oil and gas industry, many pump companies are developing multiphase pumps, which can handle liquid–gas flow directly without separating the liquid from a mixed flow. The see-through labyrinth ... -
On the Effect of the Gap of End Seals on Force Coefficients of a Test Integral Squeeze Film Damper: Experiments and Predictions
(The American Society of Mechanical Engineers (ASME), 2021)An integral squeeze film damper (ISFD) offers the advantages of a lower number of parts, a shorter axial span, a lighter weight, a split manufacturing, and high precision on its film clearance construction. An ISFD does ... -
A Thermo-Hydrodynamic Model for Thermal Energy Flow Management in A (Semi) Floating Ring Bearing System for Automotive Turbochargers
(The American Society of Mechanical Engineers (ASME), 2021)Oil-engine lubricated turbochargers (TCs) operate at high temperature and must withstand large temperature gradients that produce severe thermomechanical stresses in the TC mechanical components. Thus, an insight into the ... -
Rotordynamic Performance of the Interlocking Labyrinth Seal With a Tilting Rotor
(The American Society of Mechanical Engineers (ASME), 2021)Numerical analysis model of an interlocking labyrinth seal (ILS) is established for studying the effect of tilting rotor on its rotordynamic characteristics. The dynamic characteristic identification method based on ... -
Novel Approach for Optical Characterization of Thrust Collar Lubricated Area: Experimental and Numerical Results
(The American Society of Mechanical Engineers (ASME), 2021)Thrust collars (TCs) are bearing elements used in geared machinery that transmit axial loads from one shaft to another. TCs are primarily used in integrally geared compressors (IGCs) but are also found in gearboxes and ... -
Reliable Calculation of Thermoacoustic Instability Risk Using an Imperfect Surrogate Model
(The American Society of Mechanical Engineers (ASME), 2021)One of the fundamental tasks in performing robust thermoacoustic design of gas turbine combustors is calculating the modal instability risk, i.e., the probability that a thermoacoustic mode is unstable, given various sources ... -
A Methodology to Characterize Modal Damping in Vibrating Systems: Application to the Case of Gas Turbine Combustion Chambers
(The American Society of Mechanical Engineers (ASME), 2020)The present paper proposes a methodology to characterize the modal damping ratio as a function of frequency in vibrating systems, with a focus on gas turbine combustion chambers. Proposed methodology correlates the modal ... -
Investigation of the Fuel Distribution in a Shockless Explosion Combustor
(The American Society of Mechanical Engineers (ASME), 2020)Shockless explosion combustor (SEC) is a promising concept for implementing pressure gain combustion into a conventional gas turbine cycle. This concept aims for a quasi-homogeneous auto-ignition that induces a moderate ...