Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 821-840 of 9564
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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 ... -
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 ... -
Solution-Based Mesh Adaption Criteria Development for Accelerating Flame Tracking Simulations
(The American Society of Mechanical Engineers (ASME), 12/20/2022)Solution-based mesh adaption approaches have been widely studied and tested by different research groups to generate the required finer meshes in the critical regions on the fly while keeping the overall mesh count to a ... -
Low Reduced Frequency Theory of Airfoils Vibrating in Complex Modes
(The American Society of Mechanical Engineers (ASME), 12/13/2022)This paper extends a previous study on the unsteady aerodynamics of vibrating airfoils in the low reduced frequency regime to the case of complex modes, where the phase of the different points of the same airfoil is not ... -
Optimal Management of Reversible Heat Pump/Organic Rankine Cycle Carnot Batteries
(The American Society of Mechanical Engineers (ASME), 12/13/2022)In the view of reducing the global greenhouse gas emissions, it becomes fundamental to exploit the renewable energy sources at their maximum potential by developing effective strategies for their flexible use. Among the ... -
Carbon Capture Performance Assessment Applied to Combined Cycle Gas Turbine Under Part-Load Operation
(The American Society of Mechanical Engineers (ASME), 12/13/2022)The growing share of renewable energies in our electricity production, together with the still lacking storage capacity, strongly reinforces the need for more flexible electricity production units. In this context, combined ... -
Computation of Intrinsic Instability and Sound Generation From Auto-Ignition Fronts
(The American Society of Mechanical Engineers (ASME), 12/13/2022)Burning carbon-free fuels such as hydrogen in gas turbines promise power generation with minimal emissions of greenhouse gases. A two-stage sequential combustor architecture with a propagation-stabilized flame in the first ... -
Effects of Hole Blockage on Endwall Film Cooling and Vane Phantom Cooling Performances of a Transonic Turbine Vane
(The American Society of Mechanical Engineers (ASME), 12/8/2022 )Although the thermal-barrier coating (TBC) can protect the gas turbine components from the hot mainstream gas, it is not uncommon that the TBC partially blocks the film cooling holes during the spraying process. The film ... -
On the Effects of Optimal Implementation of Variable Rotor Speed and Power Management on Hybrid-Electric Rotorcraft
(The American Society of Mechanical Engineers (ASME), 2/23/2023 )The concept of variable rotor speed (VRS) has been recognized as an efficient means to improve rotorcraft operational performance and environmental impact, with electrification being a potential technology to further ... -
Effect of Mixing on the Anchoring and Combustion Regimes of Pure Hydrogen Flames in Sequential Combustors
(The American Society of Mechanical Engineers (ASME), 12/13/2022)In this work, we perform an experimental study of the combustion of pure hydrogen in the sequential stage of a generic combustor. This academic test rig is a simplified model of an industrial sequential combustor. The ... -
Design and Operability Challenges for Supercritical CO2 Plants: The sCO2-Flex Centrifugal Compressor Test Experience
(The American Society of Mechanical Engineers (ASME), 12/13/2022)Interest in supercritical carbon dioxide (sCO2) cycles has grown significantly in recent years. The peculiar properties of the fluid open unique opportunities but also poses several challenges. This article aims at narrowing ... -
Analyses of Damping Sustainability of Additively Manufactured Nickel Alloy Components Subjected to High Strain Loading Cycles
(The American Society of Mechanical Engineers (ASME), 12/5/2022 )While integrally bladed rotors in turbine engines have multiple benefits, they are more susceptible to vibration and as a result, high cycle fatigue failure. In response, damping treatments such as viscoelastic layers, ... -
Influence of Elevated Fuel Temperatures on the Spray Characteristics of Gasoline—Ethanol Blends
(The American Society of Mechanical Engineers (ASME), 12/5/2022 )In this study, the effect of elevated fuel temperatures on the spray characteristics of gasoline—ethanol blends was studied in an optically accessible constant volume spray and combustion vessel. MAHLE SmartHeat® is a fuel ... -
Experimental Evidence of the Band Gap Formation in Rotors With Longitudinal Periodicity
(The American Society of Mechanical Engineers (ASME), 11/29/2022)The longitudinal periodicity of the rotating elements in a rotating machine can impose band gaps (modal spacing) on the frequency spectrum of the system. These band gaps are characterized by a large distance between two ... -
Experimental Assessment of a Reverse Brayton Cycle Based on Automotive Turbochargers and E-Chargers for Cryogenic Applications
(The American Society of Mechanical Engineers (ASME), 12/13/2022)The utilization of automotive engine components for the development of a reverse Brayton cycle is shown in this study. The well-known characteristics of turbochargers and electrical centrifugal compressors commonly used ... -
The Nonlinear Thermoacoustic Eigenvalue Problem and Its Rational Approximations: Assessment of Solution Strategies
(The American Society of Mechanical Engineers (ASME), 12/13/2022)Nonlinear eigenvalue problems (NLEVPs) arise in thermoacoustics by considering the temporal evolution of small perturbations in the relevant governing equations. In this work, two solution strategies are compared: (i) a ... -
Large Eddy Simulation of a Pistonless Constant Volume Combustor: A New Concept of Pressure Gain Combustion
(The American Society of Mechanical Engineers (ASME), 11/29/2022)Classical gas turbine thermodynamic cycle has undergone no change over the last decades. The most important efficiency improvements have been obtained by reducing thermal losses and raising the overall pressure ratio and ... -
Characterization of a Lightly Loaded Underfloor Catalyzed Gasoline Particulate Filter in a Turbocharged Light Duty Truck
(The American Society of Mechanical Engineers (ASME), 11/29/2022)A test program to characterize the benefits and challenges of applying a European series production catalyzed gasoline particulate filter (GPF) to a U.S. Tier 2 turbocharged light duty truck (3.5 L Ecoboost Ford F150) in ... -
Processing Multicomponent Blade Tip Timing Experimental Data by Independent Component Analysis
(The American Society of Mechanical Engineers (ASME), 11/29/2022)Blade tip timing (BTT) is a simple, robust, and nonintrusive method for measuring the rotor blade vibrations in turbomachinery. Using this method, the analysis of vibrations characterized by multiple spectral components ...