Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 281-300 of 9298
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Experimental Study of High-Diodicity Inlet Effects on Rotating Detonation Combustor Performance and Operability
(The American Society of Mechanical Engineers (ASME), 2024)Implementing high-diodicity inlets is critical to reduce backflow and mitigate the pressure loss across the injector in rotating detonation combustors (RDCs). Experiments on air injection diodicity were conducted in a ... -
The Effect of Mixture Variation and Initial Temperature on the NH2* Thickness of Spherically Propagating Laminar Ammonia Flames
(The American Society of Mechanical Engineers (ASME), 2024)Interest in ammonia (NH3) in combustion has increased in recent years as a carbon-free fuel alternative. Therefore, understanding its combustion characteristics is crucial. One way to increase the knowledge of ammonia ... -
An Optimization Method for Stiffness and Damping Mistuning Identification From Blade Tip Timing Data
(The American Society of Mechanical Engineers (ASME), 2024)System identification of dynamic properties is of large interest in the turbomachinery industry to create more accurate computational models and more effective designs. Previous identification techniques are able to ... -
Quantitative Measurements in the Exhaust Flow of A Rotating Detonation Combustor Using Rainbow Schlieren Deflectometry
(The American Society of Mechanical Engineers (ASME), 2024)This study employs rainbow schlieren deflectometry (RSD) to characterize the unsteady, supersonic/subsonic exhaust plume of a rotating detonation combustor (RDC). First, RSD images are analyzed to quantify the frequency ... -
Performance Characterization of a Radial Rotating Detonation Combustor With Axial Exhaust
(The American Society of Mechanical Engineers (ASME), 2024)This experimental study characterizes the performance of a radial rotating detonation combustor (RDC). An aerospike nozzle for rocket propulsion has been integrated into the center of the combustor, although the same ... -
Performance Evaluation of Different Rotating Detonation Combustor Designs Using Simulations and Experiments
(The American Society of Mechanical Engineers (ASME), 2024)Rotating detonation engines (RDEs) present a potential avenue for enhancing the efficiency of gas turbine combustors through the utilization of a detonation-driven process. However, integrating an RDE with a downstream ... -
Low Swirl Effect on Compact Spray and Combustion Systems Using Additive Manufactured Dual Airblast Injectors
(The American Society of Mechanical Engineers (ASME), 2024)Novel low swirl concepts provide a promising approach to ensure stable flame anchoring over an extensive operation condition range, necessary for optimizing compact designs for liquid fuel combustors as used in hybrid ... -
Advancements in Sustainable Aviation Fuels: Impact of Nano-Additives and Ammonia-Based Strategies on Emissions
(The American Society of Mechanical Engineers (ASME), 2024)Our study investigates the impact of nanoparticulate additives—specifically those based on ammonia and water—on the combustion characteristics of Jet-A1 aviation fuel, using a 300-kW liquid swirl combustor. Experiments ... -
Numerical and Experimental Study of Flow-Induced Vibrations in Micro-Tube Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2024)Thermal management presents an increasing challenge in future engineering systems, especially in applications like combined cycle precooling, waste heat recovery, and innovative propulsion systems. These systems face a ... -
An Aero-Engine Disk Sizing and Weight Estimation Approach With Improved Temperature Profiles
(The American Society of Mechanical Engineers (ASME), 2024)During the predesign phase of an aero-engine, interdisciplinary parametric studies are crucial for identifying an optimum engine. As innovative engine concepts emerge, it is essential to study trends aiming to minimize ... -
Assessing the Environmental Impact of Aircraft/Engine Integration With Respect to Contrails
(The American Society of Mechanical Engineers (ASME), 2024)In recent years, the radiative forcing of aircraft contrails and aircraft-induced contrail cirrus have been highlighted as a serious short-term climate impact of the aviation industry. Greater understanding of factors ... -
Influence of Helical Intake Port Structure Parameters of Diesel Engine on Intake Performance
(The American Society of Mechanical Engineers (ASME), 2024)To enhance the performance of the diesel engine helical intake port, computational fluid dynamics (CFD) was employed to conduct numerical simulations of the intake port and in-cylinder flow of the D19 diesel engine. The ... -
Integrated Power and Thermal Management System for A Hybrid-Electric Aircraft: Integrated Modeling and Passive Cooling Analysis
(The American Society of Mechanical Engineers (ASME), 2024)Aircraft electrification introduces challenges in power and thermal management. In a hybrid-electric aircraft (HEA), the additional heat loads generated by the high-power electrical components in the propulsion system can ... -
NOx Emissions Assessment of a Multijet Burner Operated With Premixed High Hydrogen Natural Gas Blends
(The American Society of Mechanical Engineers (ASME), 2024)Decarbonization of gas turbine combustion creates a pressing demand for new technical solutions for the combustion process. While switching to hydrogen fuels may solve the problem of carbon emissions and associated pollutants, ... -
Comparative Analysis of Total Pressure Measurement Techniques in Rotating Detonation Combustors
(The American Society of Mechanical Engineers (ASME), 2024)Current total pressure measurement techniques in rotating detonation combustors (RDCs) are based on different assumptions and therefore show different applicability for specific RDC operating conditions, and few studies ... -
Liquid Cooling of Fuel Cell Powered Aircraft: The Effect of Coolants on Thermal Management
(The American Society of Mechanical Engineers (ASME), 2024)Electric propulsors powered by Proton Exchange Membrane Fuel Cells (PEMFCs) offer a net zero solution to aircraft propulsion. Heat generated by the PEMFCs can be transferred to atmospheric air via a liquid cooling system; ... -
Spatial Temperature Measurements in a Swirl-Stabilized Hydrogen–Air Diffusion Flame at Elevated Pressure Using Laser-Induced Grating Spectroscopy
(The American Society of Mechanical Engineers (ASME), 2024)Laser-induced grating spectroscopy (LIGS) is applied, for the first time, to a swirling nonpremixed hydrogen–air flame in a high-pressure combustion facility. A portable LIGS unit is used to probe 35 different axial and ... -
Comprehensive Understanding of Thermally Grown Oxide Morphology Effect on the Thermal Barrier Coatings Failure Under Free Edges
(The American Society of Mechanical Engineers (ASME), 2024)The growth stresses induced by the thermally grown oxide (TGO) will be amplified at the free-edge site, making the free-edge site a weak part of the thermal barrier coatings (TBCs). In this study, the TBCs failure behavior ... -
Generalized Method for the Conceptual Design of Compact Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2024)The paper introduces a novel method for generalized heat exchanger (HX) design and evaluation, freeing the process from predefined geometries. It aims to facilitate early-stage conceptual exploration, allowing the designer ... -
Development of 1400 °C (2552 °F) Class Ceramic Matrix Composite Turbine Shroud and Demonstration Test With JAXA F7 Aircraft Engine
(The American Society of Mechanical Engineers (ASME), 2024)The authors developed 1400 °C (2552 °F) class ceramic matrix composite (CMC) material system, which consists of silicon carbide (SiC) fibers and SiC matrix and ytterbium silicate base matrix, aiming for higher temperature ...