Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 121-140 of 9298
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On the Optimum Distribution of Multiple Helmholtz Resonators for Annular Combustors
(The American Society of Mechanical Engineers (ASME), 2024)The combustors of many modern land-based gas turbines and aero-engines are annular. This kind of combustors often suffer from thermoacoustic oscillations, with the occurrence of mostly the circumferential first-order, ... -
Investigation of Viscor and Methanol Spray Dynamics Using Proper Orthogonal Decomposition in Siemens Energy Industrial Atomizers
(The American Society of Mechanical Engineers (ASME), 2024)The demand to reduce carbon emissions has prompted research into alternative fuels that can replace conventional fuels like diesel in industrial gas turbines. Among different potential biofuels and e-fuels, methanol emerges ... -
Optimal Control Allocation for Distributed Electric Propulsion in a Series/Parallel Partial Hybrid Powertrain
(The American Society of Mechanical Engineers (ASME), 2024)The SUbsonic Single Aft eNgine (SUSAN) Electrofan is a National Aeronatics and Space Administration (NASA) concept transport aircraft representative of technology anticipated for a 2040 entry-into-service date. The powertrain ... -
Investigation of the Sigma Approximation Technique for the Solution of the Time Spectral Equation System
(The American Society of Mechanical Engineers (ASME), 2024)The time spectral method (TSM) is commonly utilized to analyze periodic unsteady flows within turbomachines. However, the time spectral solutions in regions with large temporal and spatial gradients, such as wakes, shocks, ... -
Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning
(The American Society of Mechanical Engineers (ASME), 2024)This study presents data-driven modeling of the Reynolds stress tensor and turbulent heat flux vector for improving unsteady Reynolds-averaged Navier–Stokes (RANS) predictions of natural convection problems. While RANS-based ... -
Robust Controller Development Via Iterative Model Updating for Active Magnetic Bearing Rotor Systems
(The American Society of Mechanical Engineers (ASME), 2024)Modern turbomachinery equipped with active magnetic bearings (AMBs) requires increasingly high-performance controllers to ensure safe and efficient operations. These controllers are typically tuned based on frequency ... -
Investigating the Impact of Steam Enhancement on Combustion in a Swirl-Assisted Jet-Stabilized Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2024)A newly developed gas turbine combustor system based on the swirl-assisted jet-stabilized concept using Jet A-1 and natural gas as reference fuel is tested under wet conditions to evaluate its combustion characteristics ... -
Characterization of Knocking Pressure Data From Two Closely Spaced Transducers: Effect of Transducer Mounting
(The American Society of Mechanical Engineers (ASME), 2025)In this study, pressure data acquired simultaneously from two different, closely spaced pressure transducers were compared to understand the quantification of knock intensity. The comparison between four different transducer ... -
Image-Based Flashback Detection in a Hydrogen-Fired Gas Turbine Using a Convolutional Autoencoder
(The American Society of Mechanical Engineers (ASME), 2025)Flame flashback (FB) is a major concern in hydrogen-fired gas turbines. In order to determine the flashback propensity of a hydrogen burner, several burner design tests at different operating points and fuel blends are ... -
In-Cylinder Imaging and Emissions Measurements of Cold-Start Split Injection Strategies
(The American Society of Mechanical Engineers (ASME), 2025)Strategies to mitigate cold-start emissions are critical to meet stringent standards for particulate and regulated gaseous emissions from direct injection spark ignition (DISI) engines. The objective of the current work ... -
Experimental Identification of Blade Tip Rub Forces at Engine Relevant Temperatures and Speeds
(The American Society of Mechanical Engineers (ASME), 2024)Abradable casing liners are used to safely minimize the clearance between rotating turbomachinery blades and outer casings. Reduced clearance improves engine efficiency but can lead to more blade tip rub events. These blade ... -
Analysis of the Flow-Field Distortions Induced by Pneumatic Pressure Probes in Test Bench Experiments on Centrifugal Compressors: Are We Testing Right?
(The American Society of Mechanical Engineers (ASME), 2024)Experimental testing at the test rig still plays a key role in the development of new centrifugal compressor designs for industrial applications. Although a wide set of different probes is used as per common practice, the ... -
Effect of Piston Ring Grooves on the Radial and Tangential Forces of a Squeeze Film Damper
(The American Society of Mechanical Engineers (ASME), 2024)Squeeze film dampers (SFDs) are components of rotating machinery used to reduce vibration amplitudes and improve the rotor dynamic stability. Piston rings (PRs) are often employed as end seals for SFDs. They enhance the ... -
Design, Analysis, and Testing of an Additively Manufactured Catalytic Combustor for a Micro-Wave Rotor Turbine
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, an additively manufactured (AM) Inconel catalytic combustor was tested in combination with a microwave rotor turbine with nonaxial channels designed for shaft power extraction. This was done in an open-loop ... -
Model Order Determination for Modal Parameter Estimation: Application to a Composite Fan Stage
(The American Society of Mechanical Engineers (ASME), 2024)Experimental methods are necessary to quantify structural damping. Among these methods, modal testing of bladed disks is of particular interest because it provides an efficient experimental characterization of these ... -
The Impact of Pad Elasticity on Frequency-Dependent Linear Dynamic Coefficients of Tilting-Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2024)The frequency-dependent dynamic coefficients of tilting-pad bearings are significantly influenced by the pad pivot elasticity. In addition to the elasticity of the pivot, there is also the flexibility of the structure that ... -
The Effect of Additive “Depositional” Reprofiling of Compressor Blade Leading Edges on Engine Performance
(The American Society of Mechanical Engineers (ASME), 2024)A common problem for gas turbine engines after ingesting atmospheric dust is compressor fouling, where small particles adhere to component surfaces. By sampling components from both a test engine and a service engine, ... -
Interplay Between Unburned Emissions and NOx Emissions From a Dual Swirl Hydrogen Air Injector
(The American Society of Mechanical Engineers (ASME), 2024)OH planar laser induced fluorescence (OH-PLIF) and particle image velocimetry (PIV) are employed to analyze the structure of hydrogen/air flames stabilized by a dual swirl injection system under globally lean and atmospheric ... -
Field Performance Testing and Test Codes for Gas Compressors
(The American Society of Mechanical Engineers (ASME), 2024)Field testing of gas compressor packages requires the accurate determination of efficiency, capacity, head, and power in sometimes less than ideal working environments. The results of field tests have significant implications ... -
Rotordynamics of a Single-Stage Brush Seal in Isolation: The Effects of Variable Stiffness and Back Plate Geometry
(The American Society of Mechanical Engineers (ASME), 2024)Brush seals control leakage around rotating components from areas of high to low pressure inside turbomachinery. They are known to contribute to the overall stability of gas turbines, therefore their dynamic behavior is ...