Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1001-1020 of 9564
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Unsteady Analysis of Aeroengine Intake Distortion Mechanisms: Vortex Dynamics in Crosswind Conditions
(The American Society of Mechanical Engineers (ASME), 2022)The formation of a ground vortex and its ingestion into an aeroengine intake under crosswind conditions play a significant role in the aerodynamic excitation of the fan. Using steady and unsteady numerical simulations, an ... -
Assessment of Two Harmonic Balance MethodBased Numerical Strategies for BladeTip/Casing Interactions: Application to NASA Rotor 67
(The American Society of Mechanical Engineers (ASME), 2022)The study presented in this paper focuses on the analysis of rubbing interactions—including unilateral contact and dry friction—between a rotating fan blade and a rigid casing by frequency domain methods. Two previously ... -
Development of an OpenSource Autonomous Computational Fluid Dynamics MetaModeling Environment for SmallScale Combustor Optimization
(The American Society of Mechanical Engineers (ASME), 2022)This work presents an opensource autonomous computational fluid dynamics (CFD) metamodeling environment (OpenACME) for smallscale combustor design optimization in a deterministic and continuous design space. OpenACME couples ... -
Investigation of Water Films Shed From an Airfoil in a HighSpeed Flow
(The American Society of Mechanical Engineers (ASME), 2022)The breakup of liquid films in highspeed flows is found in many applications. These include prefilming air blast atomization found in fuel injectors and shedding of droplet off of airfoils. In this work, a test rig has ... -
A Novel Wake Control Approach for Power Generation Improvement of Three Wind Turbines in a Wind Farm
(The American Society of Mechanical Engineers (ASME), 2022)The total power generation of a wind farm is significantly affected by the adverse wake generation of upstream wind turbines on the aerodynamic performance of the downstream wind turbines. This paper aims to provide a novel ... -
Comparison of Flame Describing Functions Measured in Single and Multiple Injector Configurations
(The American Society of Mechanical Engineers (ASME), 2022)Recent investigations of combustion instabilities in annular systems indicate that considerable insights may be gained by using information gathered in singlesector experiments. Such experiments are, for example, employed ... -
The InterBristle Pressure Field in a LargeScale Brush Seal
(The American Society of Mechanical Engineers (ASME), 2022)Brush seals promise improvements to the widely used labyrinth seal in regulating turbomachinery leakages. Enhanced resistance to the flow is provided by a static ring of densely packed fine wire bristles that are angled ... -
Circumferentially Grooved Seal Flow Field Analysis Based on Effective Film Thickness to Improve Bulk Flow Models
(The American Society of Mechanical Engineers (ASME), 2022)Bulk flow methods for circumferentially grooved seals use simplified physics models to predict leakage and rotordynamic coefficients efficiently, but uncertainty in empirical quantities like friction factors and loss ... -
Analysis of a MultiGeneration Renewable Energy System With HydrogenFueled Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2022)Solar energy is considered one of the most affordable renewable resources for meeting current energy demands and mitigating environmental problems. However, the exploitation of solar energy is challenging because of both ... -
Investigation of Gas Turbine Internal Cooling Using Supercritical CO2—Effect of Surface Roughness and Channel Aspect Ratio
(The American Society of Mechanical Engineers (ASME), 2022)In this paper, an experimental and numerical investigation of internal cooling channels with rib turbulators is presented with sCO2 as the working fluid at process conditions (pressure20.7 MPa and temperature up to 150 °C). ... -
Azimuthal Instabilities of an Annular Combustor With Different Swirling Injectors
(The American Society of Mechanical Engineers (ASME), 2022)Experiments are carried out on the laboratoryscale MICCASpray annular combustor to examine the effects of swirlers on combustion instabilities. This system comprises 16 sprayswirl injectors and gives rise to instabilities ... -
Reduced Order Modeling of Forced Response in a Multistage Compressor Under Mistuning and Aerocoupling
(The American Society of Mechanical Engineers (ASME), 2022)Vibration amplitudes and fatigue life in multistage turbomachinery are commonly estimated by an investigation of the individual stages. Research is currently extending the scope to include structural and aeroelastic ... -
Wake Structure in Yawed Approaching Flows for an AxialFlow Wind Turbine
(The American Society of Mechanical Engineers (ASME), 2022)Effects of yawed wind turbines on the wake structure are not fully understood. To obtain a better understanding, numerical studies of a smallscale threebladed horizontal axis wind turbine at tip speed ratio (TSR) = 6.7 ... -
Prediction of Thermoacoustic Instability and Fluid–Structure Interactions for Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2022)This work simulates a laboratory-scale three-dimensional methane/air burner, which features a bluff body stabilized, lean partially premixed flame experiencing strong limit cycle oscillations. A thin steel liner is installed ... -
Valve Vibration Induced Intake Air Flow Dynamics Analysis Using Near Valve Particle Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2022)The transient dynamics of air flow running through the moving intake valve gaps in combustion cylinders is crucial to the performance of spark-ignition direct-injection engines. However, research on the air flow behavior ... -
Pollutant Emissions Reporting and Performance Considerations for Hydrogen–Hydrocarbon Fuels in Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2022)Hydrogen (H2) fuel for gas turbines is a promising approach for long duration storage and dispatchable utilization of intermittent renewable power. A major global discussion point, however, is the potential air quality ... -
TURBODYNA: A Generic One-Dimensional Dynamic Simulator for Radial Turbomachinery
(The American Society of Mechanical Engineers (ASME), 2022)The turbocharged piston-driven engines are widely used in high altitude long endurance unmanned aerial vehicles (HALE UAVs). Repeated actions of engine pistons and valves give rise to engine pulsations resulting in intensive ... -
Unsteady Interaction Mechanisms of Axial-Slot Casing Treatment With Tip Region Flow in a Highly-Loaded Mixed-Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2022)The influences of axial-slot casing treatment (ASCT) on the performance and unsteady tip region flow are experimentally and numerically investigated in a highly-loaded mixed-flow compressor. The total pressure ratio, stall ... -
Rotor Stability Effects of Tilting Pad Journal Bearings With Assembled Clearance Asymmetry
(The American Society of Mechanical Engineers (ASME), 2022)This paper presents component and system-level analyses to understand the stiffness, damping, and rotor stability effects of tilting pad journal bearings (TPJB) with assembled clearance variation across pads. This variation ... -
Performance Optimization of the High-Pressure Compressor in Series Two-Stage Turbocharging System Based on Low-Speed Performance Requirements of Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2022)The performance of the high-pressure (HP) compressor is very important for the two-stage turbocharging system. However, the performance of HP compressor on the engine most of the time is poor at low speed and low mass flow ...