Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1541-1560 of 9564
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Squeeze Film Damper Suppression of Thermal Bow-Morton Effect Instability
(The American Society of Mechanical Engineers (ASME), 2020)The Morton effect (ME) is a synchronous vibration problem in turbomachinery caused by the nonuniform viscous heating around the journal circumference, and its resultant thermal bow (TB) and ensuing synchronous vibration. ... -
Assessment of a Machine-Learnt Adaptive Wall-Function in a Compressor Cascade With Sinusoidal Leading Edge
(The American Society of Mechanical Engineers (ASME), 2020)Near-wall modeling is one of the most challenging aspects of computational fluid dynamic computations. In fact, integration-to-the-wall with low-Reynolds approach strongly affects accuracy of results, but strongly increases ... -
Transient Performance Analysis of an Aero Gas Turbine Cooled Cooling Air Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2020)Aviation faces several challenges to maintain growth while adapting to an environmentally viable footprint. Increasing efficiency, which in the past induced a steady rise in the turbine entry temperatures, requires successful ... -
Assessing the Influence of Compression Ratio on Engine Characteristics Including Operational Limits of a Biogas-Fueled Spark-Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2020)Biogas, which is a renewable alternative fuel, has high antiknocking properties with the potential to substitute fossil fuels in internal combustion engines. In this study, performance characteristics of a spark-ignition ... -
Fatigue Characterization of SiC/SiC Ceramic Matrix Composites in Combustion Environment
(The American Society of Mechanical Engineers (ASME), 2020)Fatigue behavior of woven melt infiltrated (MI) SiC/SiC ceramic matrix composites (CMCs) was investigated under a tension–tension fatigue condition in a combustion environment. A special experimental facility is designed ... -
Assessing Fuel Property Effects on Cavitation and Erosion Propensity Using a Computational Fuel Screening Tool
(The American Society of Mechanical Engineers (ASME), 2020)To advance compression ignition combustion strategies, researchers have evaluated fuel property effects and their impact on achieving higher efficiencies and lower emissions levels relative to current capabilities. Within ... -
Gas Labyrinth Seals: Improved Prediction of Leakage in Gas Labyrinth Seals Using an Updated Kinetic Energy Carry-Over Coefficient
(The American Society of Mechanical Engineers (ASME), 2020)Though simple and fast, bulk-flow models (BFMs) for gas labyrinth seals (LSs) often predict the mass flow inaccurately. The BFM models rely on classical Neumann's equation model to characterize the flow through a labyrinth ... -
Boundary Layer Ingestion Propulsion: A Review on Numerical Modeling
(The American Society of Mechanical Engineers (ASME), 2020)The present paper focuses on the numerical modeling approaches adopted in boundary layer ingestion (BLI) studies. Three driving aircraft concepts have been identified, namely propulsive fuselage concept (PFC), rear engines ... -
Dynamic Estimation Method of Effective Active Site on Palladium Methane Oxidation Catalyst in Exhaust Gas of Marine Lean Burn Gas Engine
(The American Society of Mechanical Engineers (ASME), 2020)Lean-burn gas engines have recently attracted attention in the maritime industry, because they can reduce NOx, SOx, and CO2 emissions. However, since methane (CH4) is the main component of natural gas, the slipped methane, ... -
Analysis of Leaf Seal Leakage Performance Under the Influence of Manufacturing Variations Using Experiment and Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, test data are combined with results from two different computational fluid dynamics (CFD) models to investigate the leakage performance of leaf seals. Experimental data are gathered for centric rotor position ... -
Effect of Air Plasma Sprayed Flash Bond Coatings on Furnace Cycle Lifetime of Disks and Rods
(The American Society of Mechanical Engineers (ASME), 2020)Air plasma sprayed (APS) flash coatings on high velocity oxygen fuel (HVOF) bond coatings are well known to extend the lifetime of thermal barrier coatings (TBCs). Recent work compared flash coatings of NiCoCrAlY and ... -
High Amplitude Combustion Instabilities in an Annular Combustor Inducing Pressure Field Deformation and Flame Blow Off
(The American Society of Mechanical Engineers (ASME), 2020)This article reports experiments carried out in the laboratory scale annular combustor MICCA-spray equipped with multiple swirling spray injectors. The experimental setup consists in an air plenum connected to a combustion ... -
Leakage and Force Coefficients of a Grooved Wet (Bubbly Liquid) Seal for Multiphase Pumps and Comparisons With Prior Test Results for a Three Wave Seal
(The American Society of Mechanical Engineers (ASME), 2020)In the subsea oil and gas industry, multiphase pumps and wet gas compressors are engineered choices saving transportation and separation facility costs. In these machines, seals handling multiple phase components must be ... -
Enhanced Delayed Detached Eddy Simulation for Cavities and Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2020)A range of popular hybrid Reynolds-averaged Navier–Stokes -large eddy simulation (RANS-LES) methods are tested for a cavity and two labyrinth seal geometries using an in-house high-order computational fluid dynamics (CFD) ... -
Multiscale Parallelized Computational Fluid Dynamics Modeling Toward Resolving Manufacturable Roughness
(The American Society of Mechanical Engineers (ASME), 2020)Typical turbomachinery aerothermal problems of practical interest are characterized by flow structures of wide-ranging scales, which interact with each other. Such multiscale interactions can be observed between the flow ... -
Impact of Fluid Substitution on the Performance of an Axial Compressor Blade Cascade Working with Supercritical Carbon Dioxide
(The American Society of Mechanical Engineers (ASME), 2020)Recent research on turbomachinery design and analysis for supercritical carbon dioxide (sCO2) power cycles has relied on computational fluid dynamics. This has produced a large number of works whose approach is mostly ... -
Analysis of Composite Blade/Casing Rub Stability Through Delayed Differential Equations
(The American Society of Mechanical Engineers (ASME), 2020)To improve aerodynamic efficiencies, the clearances between blades and casings are becoming smaller and smaller in the aero-engine industry, which might lead to the interactions between these components. These unexpected ... -
Uncertainty Quantification Analysis of a Pressurized Fuel Cell Hybrid System
(The American Society of Mechanical Engineers (ASME), 2020)Pressurized solid oxide fuel cell (SOFC) systems are a sustainable opportunity for improvement over conventional systems, featuring high electric efficiency, potential for cogeneration applications, and low carbon emissions. ... -
A Geometry Generation Framework for Contoured Endwalls
(The American Society of Mechanical Engineers (ASME), 2020)The mainstream, or primary, flow in a gas turbine annulus is characteristically two-dimensional over the midspan region of the blading, where the radial flow is almost negligible. Contrastingly, the flow in the endwall and ... -
Surrogate-Assisted Modeling and Robust Optimization of a Micro Gas Turbine Plant With Carbon Capture
(The American Society of Mechanical Engineers (ASME), 2020)The growing share of wind and solar power in the total energy mix has caused severe problems in balancing the electrical power production. Consequently, in the future, all fossil fuel-based electricity generation will need ...