Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 561-580 of 9564
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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 ... -
Experimental Evaluation of an Electric Powertrain Designed for a 180-kW Turboelectric Aircraft Ground Test Rig
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents the experimental results of a representative aircraft turbo-electric powertrain. The 180-kW hybrid gas-electric ground test rig was designed, fabricated, and experimentally evaluated. Hybrid turbo-electric ... -
Step-by-Step Evaluation of the Fuel Switch From Kerosene to Hydrogen on the Thermodynamic Cycle in Gas Turbine Engines
(The American Society of Mechanical Engineers (ASME), 2024)Hydrogen combustion engines are one of the few possible ways forward to drastically reduce climate impact of aviation. While there is many information about the engine performance of hydrogen combustion engines, it is not ... -
Accuracy of Steady Pneumatic Probes in Unsteady Turbomachinery Flows
(The American Society of Mechanical Engineers (ASME), 2024)This study shows that no additional measurement error due to unsteadiness was detected, when measuring in periodic turbomachinery flows at frequencies up to 5 kHz with steady, pneumatic probes. An experiment was designed, ... -
Experimental and Numerical Investigation of Hydrogen Combustion in a Dual-Swirl Burner for Aero-Engine Applications
(The American Society of Mechanical Engineers (ASME), 2024)Green hydrogen produced by electrolysis offers a high potential for reducing CO2 emissions and thus represents a promising approach for the decarbonization of aviation. However, propulsion systems based on direct hydrogen ... -
Characteristics of Premixed Ammonia/Methane/Air Blends as an Alternative Fuel in a Swirl-Stabilized Gas Turbine Combustor Under Varying Pilot Percentage
(The American Society of Mechanical Engineers (ASME), 2024)Alternative low carbon fuel blends are a promising way toward clean energy transition in the transportation and power generation sectors. In this work, the objective was to study the combustion characteristics of one such ... -
Lean Blow-Off Behaviour of Premixed Bluff-Body Stabilized Hydrocarbon-Air Flames and Ammonia/Hydrogen/Nitrogen-Air Flames
(The American Society of Mechanical Engineers (ASME), 2024)The lean blow-off (LBO) behavior of turbulent premixed bluff-body stabilized hydrocarbon flames and ammonia/hydrogen/nitrogen flame was investigated and compared both experimentally and numerically. Simultaneous high-speed ... -
Adjoint-Based Optimization for the Venturi Mixer of A Burner
(The American Society of Mechanical Engineers (ASME), 2024)The optimization of Venturi mixers in burners is critical for enhancing combustion efficiency and minimizing emissions. In this study, we utilize the adjoint method to analyze and refine the design of a Venturi mixer. Our ... -
On the Potential of Biomass-Fueled Externally Fired Micro-Gas Turbines in the Energy Transition: Off-Design Performance Analysis
(The American Society of Mechanical Engineers (ASME), 2024)The potential of replacing the use of natural gas with biomass gasification syngas through an externally fired micro-gas turbine (EFMGTs) is the main scope of this study. This includes the performance assessment at various ... -
Prediction of Steam Turbine Blade Erosion Using Computational Fluid Dynamics Simulation Data and Hierarchical Machine Learning
(The American Society of Mechanical Engineers (ASME), 2024)The information of the degree of blade erosion is vital for the efficient operation of steam turbines. However, it is nearly impossible to directly measure the degree of blade erosion during operation. Moreover, collecting ... -
Compact Heat Exchangers With Curved Fins for Hydrogen Turbofan Intercooling
(The American Society of Mechanical Engineers (ASME), 2024)Hydrogen is being considered as a possible path toward carbon-neutral aviation. There are additional advantages besides its main benefit of CO2-free combustion. One application is to use it for aero engine heat management ... -
A Dynamic Testing Approach for Particulate Erosion–Corrosion for Gas Turbine Coatings
(The American Society of Mechanical Engineers (ASME), 2024)Particle interactions in engines can be complex phenomena leading to degradation of thermal (TBCs) and environmental barrier coatings (EBCs) meant to protect engine components. Ingestion of particles into the engine can ... -
Validation of Thermal History Coating Technology on Two Stage-One Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2024)Small and midsize gas turbines for distributed power generation have been widely used in recent years, with designers constantly seeking to improve efficiency by increasing operating temperatures. Therefore, accurate thermal ... -
A Preconditioner-Based Data-Driven Polynomial Expansion Method: Application to Compressor Blade With Leading Edge Uncertainty
(The American Society of Mechanical Engineers (ASME), 2024)In engineering practice, the amount of measured data is often scarce and limited, posing a challenge in uncertainty quantification (UQ) and propagation. Data-driven polynomial chaos (DDPC) is an effective way to tackle ... -
Numerical Investigation on the Influence of Continuous Rotating Backpropagation Pressure Wave on Turbine Performance
(The American Society of Mechanical Engineers (ASME), 2024)Researches have shown that the use of a continuous detonation afterburner can improve the propulsion performance of aero engine. However, backpropagation pressure waves (BPW) generated by the pressure gain of detonation ...