Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4981-5000 of 9564
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Derivation of Diagnostic Requirements for a Distributed UAV Turbofan Engine Control System
(The American Society of Mechanical Engineers (ASME), 2008)This paper presents a method for deriving requirements for the efficiency of diagnostic functions in distributed electronic turbofan engine control systems. Distributed engine control systems consist ... -
Development and Application of an Eight-Step Global Mechanism for CFD and CRN Simulations of Lean-Premixed Combustors
(The American Society of Mechanical Engineers (ASME), 2008)In this paper, the development of an eight-step global chemical kinetic mechanism for methane oxidation with nitric oxide formation in lean-premixed combustion at elevated pressures is described ... -
A Novel Multifunctional Energy System (MES) for CO2 Removal With Zero Energy Penalty
(The American Society of Mechanical Engineers (ASME), 2008)This paper proposes a novel, multifunctional energy system (MES), in which hydrogen and electricity are cogenerated and about 90% of CO2 is removed. By integrating the methane/steam reforming ... -
Laboratory Studies of the Flow Field Characteristics of Low-Swirl Injectors for Adaptation to Fuel-Flexible Turbines
(The American Society of Mechanical Engineers (ASME), 2008)The low-swirl injector (LSI) is a simple and cost-effective lean premixed combustion method for natural-gas turbines to achieve ultralow emissions (<5 ppm NOx and CO) without invoking tight ... -
Vortex Breakdown in Swirling Fuel Injector Flows
(The American Society of Mechanical Engineers (ASME), 2008)It is well known that the process of vortex breakdown plays an important role in establishing the near-field aerodynamic characteristics of fuel injectors, influencing fuel/air mixing and flame ... -
A Hybrid Prognostic Model Formulation and Health Estimation of Auxiliary Power Units
(The American Society of Mechanical Engineers (ASME), 2008)Prognostic health monitoring is an important element of condition-based maintenance and logistics support. The accuracy of prediction and the associated confidence in prediction greatly influence ... -
The Effect of Liquid-Fuel Preparation on Gas Turbine Emissions
(The American Society of Mechanical Engineers (ASME), 2008)The emissions of liquid-fuel fired gas turbine engines are strongly affected by the fuel preparation process that includes atomization, evaporation, and mixing. In the present paper, the effects ... -
Engine Design and Operational Impacts on Particulate Matter Precursor Emissions
(The American Society of Mechanical Engineers (ASME), 2008)Aircraft emissions of trace sulfur and nitrogen oxides contribute to the generation of fine volatile particulate matter (PM). Resultant changes to ambient PM concentrations and radiative properties ... -
Cold Engine Transient Fuel Control Experiments in a Port Fuel Injected CFR Engine
(The American Society of Mechanical Engineers (ASME), 2008)Air-fuel mixture preparation is particularly challenging during cold engine throttle transients due to poor fuel vaporization and transport delays in port fuel injected (PFI) engines. In this ... -
Study of Diesel Jet Variability Using Single-Shot X-Ray Radiography
(The American Society of Mechanical Engineers (ASME), 2008)The variability of diesel jet structure, both as a function of time and between individual injection events, has important implications on the breakup and mixing of the jet. It is accepted ... -
Combustion Performance of Liquid Biofuels in a Swirl-Stabilized Burner
(The American Society of Mechanical Engineers (ASME), 2008)Fuels produced from renewable sources offer an economically viable pathway to curtail emissions of greenhouse gases. Two such liquid fuels in common usage are biodiesel and ethanol derived from ... -
Sliding Mode Control of Gas Turbines Using Multirate-Output Feedback
(The American Society of Mechanical Engineers (ASME), 2008)The advent of electronic controllers in the field of gas turbine control has allowed the implementation of sophisticated control algorithms. The design of a control system requires accurate ... -
Modeling the Effect of Injector Nozzle-Hole Layout on Diesel Engine Fuel Consumption and Emissions
(The American Society of Mechanical Engineers (ASME), 2008)Numerical simulations were used to study the effect of reduced nozzle-hole size and nozzle tip hole configuration on the combustion characteristics of a high speed direct injection diesel engine. ... -
Optical Diagnostics of Late-Injection Low-Temperature Combustion in a Heavy-Duty Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2008)A late-injection, high exhaust-gas recirculation rate, low-temperature combustion strategy is investigated in a heavy-duty diesel engine using a suite of optical diagnostics: chemiluminescence for ... -
Low NOx Advanced Vortex Combustor
(The American Society of Mechanical Engineers (ASME), 2008)A lean-premixed advanced vortex combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory in ... -
Experimental Investigation of Dynamics Effects on Multiple-Injection Common Rail System Performance
(The American Society of Mechanical Engineers (ASME), 2008)Fundamental aspects of Common Rail (CR) fuel-injection-system dynamics were investigated, paying specific attention to the wave propagation induced pressure oscillations and to their relationships ... -
Spray and Combustion Characteristics of Biodiesel∕Diesel Blended Fuel in a Direct Injection Common-Rail Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2008)The aim of this work is to investigate the effect of the blending ratio and pilot injection on the spray and combustion characteristics of biodiesel fuel and compare these factors with those ... -
Reduction of Numerical Parameter Dependencies in Diesel Spray Models
(The American Society of Mechanical Engineers (ASME), 2008)Numerical grid and time-step dependencies of discrete droplet Lagrangian spray models are identified. The two main sources of grid dependency are due to errors in predicting the droplet-gas ... -
The Application of System CFD to the Design and Optimization of High-Temperature Gas-Cooled Nuclear Power Plants
(The American Society of Mechanical Engineers (ASME), 2008)The objective of this paper is to model the steady-state and dynamic operation of a pebble-bed-type high temperature gas-cooled reactor power plant using a system computational fluid dynamics ... -
Particle Image Velocimetry Measurements of In-Cylinder Flow in a Four-Stroke Utility Engine and Correlation With Combustion Measurements
(The American Society of Mechanical Engineers (ASME), 2008)Large-scale flows in internal combustion engines directly affect combustion duration and emission production. The effect of intake port geometry on combustion performance was studied in a four-stroke ...