Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4821-4840 of 9564
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Addressing Cam Wear and Follower Jump in Single-Dwell Cam-Follower Systems With an Adjustable Modified Trapezoidal Acceleration Cam Profile
(The American Society of Mechanical Engineers (ASME), 2009)Presented is a modified trapezoidal cam profile with an adjustable forward and backward acceleration. The profile is suitable for single-dwell cam and follower applications. The main benefit of ... -
Experimental Study on Natural Circulation and Air-Injection Enhanced Circulation With Different Fluids
(The American Society of Mechanical Engineers (ASME), 2009)This paper reports on an experimental investigation on natural circulation and air-injection enhanced circulation performed adopting different fluids. This work is aimed at providing information ... -
Impact of Manufacturing Variability on Combustor Liner Durability
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a probability-based systems-level approach for assessing the impact of manufacturing variability on combustor liner durability. Simplified models are used to link combustor life, ... -
A Comparison of Ethanol and Butanol as Oxygenates Using a Direct-Injection, Spark-Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2009)This study was designed to evaluate a “what if” scenario in terms of using butanol as an oxygenate in place of ethanol in an engine calibrated for gasoline operation. No changes to the stock ... -
Robustness Analysis of Mistuned Bladed Disk Using the Upper Bound of Structured Singular Value
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a method for the robustness analysis of the bladed disk with bounded random mistuning. The robust stability and performance are evaluated by the upper bound of the structured ... -
Modeling Soot Formation Using Reduced Polycyclic Aromatic Hydrocarbon Chemistry in n-Heptane Lifted Flames With Application to Low Temperature Combustion
(The American Society of Mechanical Engineers (ASME), 2009)A numerical study of in-cylinder soot formation and oxidation processes in n-heptane lifted flames using various soot inception species has been conducted. In a recent study by the authors, it ... -
Long-Term Microturbine Exposure of an Advanced Alloy for Microturbine Primary Surface Recuperators
(The American Society of Mechanical Engineers (ASME), 2009)Haynes alloy HR-120 (Haynes and HR-120 are trademarks of Haynes International, Inc.) forms a protective oxide scale when exposed to the harsh operating environment of a microturbine primary ... -
On-Condition Maintenance for Nonmodular Jet Engines: An Experience
(The American Society of Mechanical Engineers (ASME), 2009)Using updated knowledge and gained experience in engine control and maintenance, a specific on-condition maintenance concept of RD-33 engines installed on MiG-29s was developed. The engines had ... -
Pressure Load Estimation During Ex-Vessel Steam Explosion
(The American Society of Mechanical Engineers (ASME), 2009)An ex-vessel steam explosion may occur when, during a severe reactor accident, the reactor pressure vessel fails and the molten core pours into the water in the reactor cavity. A steam explosion ... -
Analysis of NOx Formation in a Hydrogen-Fueled Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2009)A commercially available natural gas fueled gas turbine engine was operated on hydrogen. Three sets of fuel injectors were developed to facilitate stable operation while generating differing ... -
Combustion Performance of Biodiesel and Diesel-Vegetable Oil Blends in a Simulated Gas Turbine Burner
(The American Society of Mechanical Engineers (ASME), 2009)Recent increases in fuel costs, concerns for global warming, and limited supplies of fossil fuels have prompted wide spread research on renewable liquid biofuels produced domestically from ... -
The Influence of Dump Gap on External Combustor Aerodynamics at High Fuel Injector Flow Rates
(The American Society of Mechanical Engineers (ASME), 2009)The increasing demand to reduce fuel burn, hence CO2 emissions, from the gas turbine requires efficient diffusion to reduce the system pressure loss in the combustor. However, interactions between ... -
Simulation of Turbulent Lifted Flames Using a Partially Premixed Coherent Flame Model
(The American Society of Mechanical Engineers (ASME), 2009)Partially premixed combustion occurs in many combustion devices of practical interest, such as gas-turbine combustors. Development of corresponding turbulent combustion models is important to improve ... -
Spatiotemporal Characterization of a Conical Swirler Flow Field Under Strong Forcing
(The American Society of Mechanical Engineers (ASME), 2009)In this study, a spatiotemporal characterization of forced and unforced flows of a conical swirler is performed based on particle image velocimetry (PIV) and laser Doppler anemometry (LDA). The ... -
Steady-State and Transient Performance Modeling of Smart UAV Propulsion System Using SIMULINK
(The American Society of Mechanical Engineers (ASME), 2009)Because an aircraft gas turbine operates under various flight conditions that change with altitude, flight velocity, and ambient temperature, the performance estimation that considers the flight ... -
Steady State Off-Design and Transient Behavior of a Solid Oxide Fuel Cell/Gas Turbine Hybrid Power Plant With Additional Firing of the Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2009)The purpose of the current work is to analyze and also to verify the operating behavior of a solid oxide fuel cell/gas turbine (GT) hybrid system in order to derive necessary requirements ... -
Computational Study of the Effects of Shock Waves on Film Cooling Effectiveness
(The American Society of Mechanical Engineers (ASME), 2009)The performance of a louver cooling scheme on a transonic airfoil has been studied numerically in this paper. Film cooling holes are located near the passage throat. The Mach number at the ... -
Fast Epitaxial High Temperature Brazing of Single Crystalline Nickel Based Superalloys
(The American Society of Mechanical Engineers (ASME), 2009)A new high temperature brazing technology for the repair of turbine components made of single crystalline nickel based superalloys has been developed. It allows the repair of single crystalline ... -
A Model of Nonlinear Fatigue-Creep (Dwell) Interactions
(The American Society of Mechanical Engineers (ASME), 2009)A nonlinear creep/dwell interaction model is derived based on nucleation and propagation of a surface fatigue crack and its coalescence with creep/dwell damages (cavities or wedge cracks) along ... -
Secondary Air System Component Modeling for Engine Performance Simulations
(The American Society of Mechanical Engineers (ASME), 2009)This paper describes the modeling of typical secondary air system elements such as rotating orifices, seals, and flow passages with heat and work transfer from the surrounding surfaces. The ...