Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 401-420 of 9564
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Model Order Determination for Modal Parameter Estimation: Application to a Composite Fan Stage
(The American Society of Mechanical Engineers (ASME), 2024)Experimental methods are necessary to quantify structural damping. Among these methods, modal testing of bladed disks is of particular interest because it provides an efficient experimental characterization of these ... -
The Impact of Pad Elasticity on Frequency-Dependent Linear Dynamic Coefficients of Tilting-Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2024)The frequency-dependent dynamic coefficients of tilting-pad bearings are significantly influenced by the pad pivot elasticity. In addition to the elasticity of the pivot, there is also the flexibility of the structure that ... -
The Effect of Additive “Depositional” Reprofiling of Compressor Blade Leading Edges on Engine Performance
(The American Society of Mechanical Engineers (ASME), 2024)A common problem for gas turbine engines after ingesting atmospheric dust is compressor fouling, where small particles adhere to component surfaces. By sampling components from both a test engine and a service engine, ... -
Interplay Between Unburned Emissions and NOx Emissions From a Dual Swirl Hydrogen Air Injector
(The American Society of Mechanical Engineers (ASME), 2024)OH planar laser induced fluorescence (OH-PLIF) and particle image velocimetry (PIV) are employed to analyze the structure of hydrogen/air flames stabilized by a dual swirl injection system under globally lean and atmospheric ... -
Field Performance Testing and Test Codes for Gas Compressors
(The American Society of Mechanical Engineers (ASME), 2024)Field testing of gas compressor packages requires the accurate determination of efficiency, capacity, head, and power in sometimes less than ideal working environments. The results of field tests have significant implications ... -
Rotordynamics of a Single-Stage Brush Seal in Isolation: The Effects of Variable Stiffness and Back Plate Geometry
(The American Society of Mechanical Engineers (ASME), 2024)Brush seals control leakage around rotating components from areas of high to low pressure inside turbomachinery. They are known to contribute to the overall stability of gas turbines, therefore their dynamic behavior is ... -
On Leakage Flows in a Liquid Hydrogen Multistage Pump for Aircraft Engine Applications
(The American Society of Mechanical Engineers (ASME), 2024)A comprehensive operational characterization of a representative, liquid hydrogen (LH2) aircraft engine pump, a key enabler for future hydrogen aviation, is presented in this work. The implications of leakage flows are ... -
Dynamic Performance Analysis of a Turbocharged PEMFC System
(The American Society of Mechanical Engineers (ASME), 2024)Proton-exchange membrane fuel cell (PEMFC) systems are one of the most promising technologies for the decarbonization of the transportation and power sectors. This article investigates the dynamics of an innovative ... -
Cooling System of a High-Pressure Centrifugal Compressor: Development and Impact on Wheel Temperatures
(The American Society of Mechanical Engineers (ASME), 2024)High power density, low fuel consumption, and a compact design with competitive total costs of ownership are key requirements for internal combustion engines for conventional fuels and carbon-free or carbon-neutral future ... -
Bayesian Data Assimilation in Cold Flow Experiments on an Industrial Thermoacoustic Rig
(The American Society of Mechanical Engineers (ASME), 2024)We assimilate experimental data from nonreacting flow in the SCARLET (SCaled Acoustic Rig for Low Emission Technologies) test rig using physics-based Bayesian inference. We model the complex geometry of the combustor with ... -
Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements
(The American Society of Mechanical Engineers (ASME), 2024)We use approximate Bayesian inference, accelerated by adjoint methods, to construct a quantitatively accurate model of the thermoacoustic behavior of a weakly turbulent conical flame in a duct. We first perform a series ... -
Vaneless Diffuser Modeling for Real Gas Supercritical Carbon Dioxide Flows: Need for a Data-Driven Approach
(The American Society of Mechanical Engineers (ASME), 2024)In this work, a real gas-based vaneless diffuser (VLD) differential equation model is presented. The model requires the specification of the skin friction coefficient as input. However, the use of standard VLD friction ... -
Aerodynamic Study of a Horizontal Axis Wind Turbine in Surge Motion Under Angular Speed and Blade Pitch Controls
(The American Society of Mechanical Engineers (ASME), 2024)Floating offshore wind turbines (FOWTs) experience dynamic conditions due to platform motion, requiring specific control strategies to mitigate loads and promote the wake diffusion improving overall wind farm efficiency. ... -
Tribological Performance of Soft Magnetic Composite Materials for Gas Turbine Applications
(The American Society of Mechanical Engineers (ASME), 2024)Soft magnetic composites (SMCs) have gained attention in the last years of their usage in more compact and powerful electromechanical systems. These materials are used to combine the application of metallic material to the ... -
Computational Fluid Dynamics Modeling of Additively Manufactured Extreme Environment Heat Exchangers for Waste Heat Recuperation
(The American Society of Mechanical Engineers (ASME), 2024)Advanced Brayton cycle-based waste heat recovery (WHR) system for a targeted energy efficiency of 20–50% and gravimetric power densities of 1.6–1.9 kW/kg are attractive propositions for future airplane designs. One of the ... -
Probabilistic Modeling Geometric Tolerance and Low Cycle Fatigue Life of Gas Turbine Compressor Blade
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents a probabilistic low cycle fatigue (LCF) assessment for geometric tolerances on high load contact surfaces of gas turbine compressor blades. The typical patterns of the geometric deviations for the root ... -
A Large Eddy Simulation Study on Hydrogen Microjets in Hot Vitiated Crossflow
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, the results of a large eddy simulation (LES) study on hydrogen microjets (dj ∼ 0.5 mm) injected into a hot (1600 K) vitiated crossflow at different angles, namely, normal (90 deg) and inclined jet (30 deg), ... -
Model-Based Inference of Flame Transfer Matrices From Acoustic Measurements in an Aero-Engine Test Rig
(The American Society of Mechanical Engineers (ASME), 2024)Flame dynamics, represented as a flame transfer matrix (FTM), is not directly measurable in test rigs and must be deduced from transfer matrix measurements of the combustion system. The burner-flame transfer matrix (BFTM) ... -
A Parametric Study on NOx Emissions From Ammonia Containing Product Gas in Rich–Quench–Lean Combustion
(The American Society of Mechanical Engineers (ASME), 2024)Due to climate change, there has been an increasing demand for fuels that can accelerate the transition away from fossil fuels to clean energy. Humidified product gas obtained from gasifying biomass is emerging as a promising ... -
Aeroelastic Influence of Blade-Shaft Coupling in a 1 1/2-Stage Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2024)The design process of turbomachinery is often constraint by aeroelastic phenomena. The design choices are limited by possible structural failure, which can be caused by high vibration amplitudes. In particular, damping has ...