Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3781-3800 of 9564
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Manufacturing Stress Corrosion Cracking Tube Specimens for Eddy Current Technique Evaluation
(The American Society of Mechanical Engineers (ASME), 2013)To detect degradation in steam generator (SG) tubes, periodic inspection using nondestructive examination techniques, such as an eddy current testing, is a common practice. Therefore, it is critical to evaluate and validate ... -
Mechanism of Upward Fuel Discharge During Core Disruptive Accidents in Sodium Cooled Fast Reactors
(The American Society of Mechanical Engineers (ASME), 2013)The elimination of severe power excursion during core disruptive accidents is a key issue for the enhanced safety of sodiumcooled fast reactors. In order to prevent the formation of a largescale molten fuel pool within a ... -
Effects of Centrifugal Forces on Particle Deposition for a Representative Seal Pin Between Two Blades
(The American Society of Mechanical Engineers (ASME), 2013)Many landbased gas turbine applications are conducive to the formation of rust in the supply piping and other components that are upstream of the gas turbine. Many of these applications do not incorporate an effective ... -
A Study of Nonlinear Vibrations in a Frictionally Damped Turbine Bladed Disk With Comprehensive Modeling of Aerodynamic Effects
(The American Society of Mechanical Engineers (ASME), 2013)A new effective method for comprehensive modeling of gas flow effects on vibration of nonlinear vibration of bladed disks has been developed for a case when the effect of the gas flow on the mode shapes is significant. The ... -
Combustion Phasing Effect on Cycle Efficiency of a Diesel Engine Using Advanced Gasoline Fumigation
(The American Society of Mechanical Engineers (ASME), 2013)Advanced premixed compression ignition (CI) combustion using fumigation has been shown to yield significant improvements in indicated efficiency over traditional diesel combustion strategies while simultaneously reducing ... -
Scavenge Flow in a Bearing Chamber With Tangential Sump Off Take
(The American Society of Mechanical Engineers (ASME), 2013)A tangential sump design is employed in several aeroengines mainly due to its simplicity and compactness. However various problems have prompted investigations of the sump design. An experimental program at Purdue University ... -
Misalignment in Combi Bearing: A Cause of Parametric Instability in Vertical Rotor Systems
(The American Society of Mechanical Engineers (ASME), 2013)The dynamic characteristics of the combibearing (combined thrustjournal bearing) in vertical rotor systems were analytically modeled and experimentally verified in the authors’ previous publications. An angular misalignment, ... -
Review and a Methodology to Investigate the Effects of Monolithic Channel Geometry
(The American Society of Mechanical Engineers (ASME), 2013)A typical monolithic catalyst consists of long, narrow, square channels containing a washcoat of catalytic material. While this geometry is the most common, other shapes may be better suited for particular applications. ... -
Rotating Flow and Heat Transfer in Cylindrical Cavities With Radial Inflow
(The American Society of Mechanical Engineers (ASME), 2013)The design and optimization of an efficient internal air system of a gas turbine requires a thorough understanding of the flow and heat transfer in rotating disc cavities. The present study is devoted to the numerical ... -
Application of a Smooth Approximation of the Schmid's Law to a Single Crystal Gas Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2013)In industrial practice the choice of the most suitable material model does not solely rely on the ability of the model in describing the intended phenomena. Most of the choice is often based on a tradeoff between a great ... -
Evaluation of the Level of Gaseous Fuel Bound Sulfur on Fine Particulate Emission From a Low Emission Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2013)The present work investigates the effect of natural gas fuel sulfur on particulate emissions from stationary gas turbine engines used for electricity generation. Fuel sulfur from standard line gas was scrubbed using a ... -
Numerical Investigation of Ash Deposition on Nozzle Guide Vane Endwalls
(The American Society of Mechanical Engineers (ASME), 2013)A computational study was performed to determine the factors that affect ash deposition rates on the endwalls in a nozzle guide vane passage. Deposition tests were simulated in flow around a flat plate with a cylindrical ... -
Emission Reduction of Fuel Staged Aircraft Engine Combustor Using an Additional Premixed Fuel Nozzle
(The American Society of Mechanical Engineers (ASME), 2013)The Japan Aerospace Exploration Agency (JAXA) is conducting research and development on aircraft engine technologies to reduce environmental impact for the Technology Development Project for Clean Engines (TechCLEAN). As ... -
Assessment of Waste Heat Recovery From a Heavy Duty Truck Engine by Means of an ORC Turbogenerator
(The American Society of Mechanical Engineers (ASME), 2013)This paper documents a feasibility study on a waste heat recovery system for heavyduty truck engines based on an organic Rankine cycle (ORC) turbogenerator. The study addresses many of the challenges of a mobile automotive ... -
Alternative Fuels Based on Biomass: An Investigation of Combustion Properties of Product Gases
(The American Society of Mechanical Engineers (ASME), 2013)Fuels from low quality feedstock such as biomass and biomass residues are currently discussed with respect to their potential to contribute to a more sustainable electrical power supply. In the present work, we report on ... -
Part Load Operation of a Piloted FLOXآ® Combustion System
(The American Society of Mechanical Engineers (ASME), 2013)A large operational envelope is a key requirement for modern gas turbines. Fuel staging is used here to improve the part load performance of an enhanced FLOXآ® type combustor. A swirlstabilized pilot stage is integrated ... -
Efficiency Improvement in Precombustion CO2 Removal Units With a Waste–Heat Recovery ORC Power Plant
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents an analysis about recovering lowgrade thermal energy from a precombustion CO2 capture process as part of an integrated gasification combined cycle (IGCC) power plant by means of organic rankine cycle ... -
Enhancement of the Electrical Efficiency of Commercial Fuel Cell Units by Means of an Organic Rankine Cycle: A Case Study
(The American Society of Mechanical Engineers (ASME), 2013)Among the various fuel cell (FC) systems, molten carbonate fuel cells (MCFC) are nowadays one of the most promising technologies, thanks to the lower specific costs and a very high electrical efficiency (net low heating ... -
Shape Optimization of an Organic Rankine Cycle Radial Turbine Nozzle
(The American Society of Mechanical Engineers (ASME), 2013)During the last decade, organic Rankine cycle (ORC) turbogenerators have become very attractive for the exploitation of lowtemperature heat sources in the small to medium power range. Organic Rankine cycles usually operate ... -
Preliminary Design of a Centrifugal Turbine for Organic Rankine Cycle Applications
(The American Society of Mechanical Engineers (ASME), 2013)Organic rankine cycles (ORC) are renowned to be attractive energy conversion systems for the thermal energy sources in the smalltomedium power range. A critical component in the ORC technology is the turboexpander; the ...