Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 961-980 of 9564
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Effect of Outlet Boundary Condition on the Acoustic Modeshape and Flame Dynamics of a Partially Premixed Swirl Stabilized Combustor
(The American Society of Mechanical Engineers (ASME), 2022)Industrial gas turbines commonly use lean premixed swirl stabilized combustors that are prone to thermo-acoustic instabilities. Combustor testing involves several steps ranging from atmospheric to high-pressure conditions. ... -
Component Tests and Numerical Investigations to Determine the Lifetime and Failure Behavior of End Stage Blades
(The American Society of Mechanical Engineers (ASME), 2022)The paper focuses on experimental and numerical fatigue assessment procedures to evaluate the influence of multi-axial stress state caused by high centrifugal forces superimposed with bending loads due to blade vibrations ... -
Effect of Intake Charge Temperature on Oxy-Fuel Combustion in an HCCI Diesel Engine Under Different Carbon Dioxide Dilutions
(The American Society of Mechanical Engineers (ASME), 2022)Carbon dioxide is one of the leading contributors to global warming. Oxy-fuel combustion (OFC) integrated with carbon capture and storage (CCS) technology is an efficient way to reduce carbon dioxide emissions. In OFC, ... -
Design of Control Schedules for Interturbine Burner Turbofan Engine Considering Ignition and Flameout Characteristics
(The American Society of Mechanical Engineers (ASME), 2022)The interturbine burner (ITB) engine, which is introduced between high and low pressure turbines (LPTs), is a relatively new concept for increasing specific thrust and lowering high altitude specific fuel consumption (SFC) ... -
A New Simulation-Based Methodology to Improve Medium-Speed Diesel Engines BSFC/NOx Tradeoff With an Optimized Air Charging System
(The American Society of Mechanical Engineers (ASME), 2022)This paper aims at introducing an original, simulation based, methodology to optimize air charging system of a medium speed engine in order to improve fuel consumption/NOx tradeoff, over a given load profile. A preliminary ... -
A Stochastic and Bayesian Inference Toolchain for Uncertainty and Risk Quantification of Rare Autoignition Events in Dry LowEmission Premixers
(The American Society of Mechanical Engineers (ASME), 2022)Quantification of aleatoric uncertainties due to the inherent variabilities in operating conditions and fuel composition is essential for designing and improving premixers in dry lowemissions (DLE) combustion systems. ... -
Compressor Surge Precursors for a Turbocharger Coupled to a Pressure Vessel
(The American Society of Mechanical Engineers (ASME), 2022)Dynamic compressors operating region is mainly constrained by fluiddynamic instabilities occurring at low mass flowrate conditions, such as surge and rotating stall. This work presents a vibroacoustic experimental investigation ... -
Power Flow Optimization for a HybridElectric Propulsion System
(The American Society of Mechanical Engineers (ASME), 2022)This study deals with the optimization of performance for a hybridelectric propulsion system. It focuses on the modeling and power management frameworks, while evaluation is done on a single flight basis. The main objective ... -
Thermodynamic Assessment of Exhaust Gas Recirculation in HighVolume Hydrogen Gas Turbines in Combined Cycle Mode
(The American Society of Mechanical Engineers (ASME), 2022)To reach netzero while ensuring grid reliability and resiliency, gas turbine (GT) technology has a place for years to come. However, shifting to lowcarbon fuels, such as hydrogen, is the key to maintain positive returns ... -
KnowledgeBased Process Design Optimization in Blisk Manufacturing
(The American Society of Mechanical Engineers (ASME), 2022)The manufacturing process of bladeintegrated disks (blisks) represents one of the most challenging tasks in turbomachinery manufacturing. The requirement is to machine complex, thinwalled blade geometries with high aspect ... -
Effect of Strong Azimuthal Swirl on Ignition and LightAround in an Annular Combustor
(The American Society of Mechanical Engineers (ASME), 2022)In this paper, we investigate the effect of strong azimuthal swirl on ignition dynamics in a laboratoryscale annular combustor. Bulk azimuthal swirl was produced by a novel angled injector configuration, producing swirling ... -
Modeling and Optimization of a Hospital Gas TurbineBased Cogeneration System
(The American Society of Mechanical Engineers (ASME), 2022)Hospitals are among the most energyintensive commercial buildings in the service industry. Their energy demand is characterized by specific features, being operative 24 h a day, 365 days a year. Several activities performed ... -
Effect of Methane on the Ignition Process of Spray Flame Using Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2022)The ignition process of spray flame in a methane environment was studied using large eddy simulation. By comparing the combustion process of ndodecane spray (single fuel, SF) and ndodecane/methane dual fuels (DF), the ... -
Optical and Numerical Investigation of Flame Propagation in a Heavy Duty Spark Ignited Natural Gas Engine With a BowlinPiston Chamber
(The American Society of Mechanical Engineers (ASME), 2022)Increasing the natural gas (NG) use in heavyduty engines is beneficial for reducing greenhousegas emissions from power generation and transportation. However, converting compression ignition (CI) engines to NG spark ignition ... -
Performance Assessment of Tesla Expander Using ThreeDimensional Numerical Simulation
(The American Society of Mechanical Engineers (ASME), 2022)Bladeless or Tesla turbines consist of several flat parallel disks mounted on a shaft with a narrow gap between them. The analytical solution of Navier–Stokes equations for the flow between disks has been extensively studied ... -
A New Interpretation of Hot Gas Ingress Through Turbine Rim Seals Influenced by Mainstream Annulus Swirl
(The American Society of Mechanical Engineers (ASME), 2022)Rim seals are fitted at the periphery of the stator and rotor disks to reduce the adverse effects of hot gas ingress on highly stressed turbine components limited by temperature. Ingress is induced by rotational effects ... -
An Optimization Methodology for Turbines Driven by Pulsed Detonation Combustors
(The American Society of Mechanical Engineers (ASME), 2022)A step change in efficiency of gas turbine technology and, subsequently, an emissions reduction from this technology requires conceptual changes. Substituting conventional combustion chambers with pressure gain combustion ... -
Flow Modal Decomposition of a VerticalAxis Wind Turbine With the Moving Boundaries of Rotating Blades
(The American Society of Mechanical Engineers (ASME), 2022)Aiming at analyzing the wake evolution features of a 3blade vertical axis wind turbine (VAWT), dynamic mode decomposition (DMD) is used to evaluate statistics of the flow field based on unsteady flow field computations. ... -
A Nonlinear Rotordynamics Model for Automotive Turbochargers Coupled to a Physical Model for A (Semi) Floating Ring Bearing System
(The American Society of Mechanical Engineers (ASME), 2022)Automotive turbochargers (TCs) use an engine oil lubricated bearing system to produce acceptable performance (as per the engine volumetric efficiency) and proven reliability. However, the bearings also cause TC rotordynamic ... -
Spray Characterization of a Preheated BioOil Surrogate at Elevated Pressures
(The American Society of Mechanical Engineers (ASME), 2022)Atomization plays an important role in the gasification or combustion of biooils, where the atomizer parameters need to be properly controlled to efficiently atomize a highly viscous liquid at elevated pressures with ...