Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4761-4780 of 9564
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Relationship of Influence Coefficients Between Static-Couple and Multiplane Methods on Two-Plane Balancing
(The American Society of Mechanical Engineers (ASME), 2009)This paper demonstrates analytical relationship of influence coefficients between static-couple and multiplane methods on two-plane balancing as well as its application. For the static-couple approach, ... -
Design, Fabrication, and Performance of Foil Gas Thrust Bearings for Microturbomachinery Applications
(The American Society of Mechanical Engineers (ASME), 2009)A methodology for the design and construction of simple foil thrust bearings intended for parametric performance testing and low marginal costs is presented. Features drawn from a review of the ... -
Design and Performance Evaluation of a Trigeneration System Incorporating Hydraulic Storage and an Inverted Brayton Cycle
(The American Society of Mechanical Engineers (ASME), 2009)To bring the economic benefit of trigeneration to small-scale users without incorporating expensive components, an inverted Brayton cycle (IBC) is employed, which makes use of the expander section ... -
Nonlinear Numerical Prediction of Gas Foil Bearing Stability and Unbalanced Response
(The American Society of Mechanical Engineers (ASME), 2009)One of the main interests of gas foil bearings lies in their superior rotordynamic characteristics compared with conventional bearings. A numerical investigation on the stability limit and on ... -
Ten Years of Experience With a Small Jet Engine as a Support for Education
(The American Society of Mechanical Engineers (ASME), 2009)In 1997 the Turbomachinery Group of the University of Liège decided to acquire a small jet engine to illustrate the courses in propulsion and to provide the students with the opportunity ... -
Reduction of Multistage Disk Models: Application to an Industrial Rotor
(The American Society of Mechanical Engineers (ASME), 2009)The present study deals with the reduction of models of multistage bladed disk assemblies. The proposed method relies on the substructuring of the rotor into sectors. The bladed disks are ... -
Damping Ratio Estimation Techniques for Rotordynamic Stability Measurements
(The American Society of Mechanical Engineers (ASME), 2009)Rotor stability is most commonly estimated using methods derived from a simple single degree of freedom system. When the modes of more complex systems, such as rotors, are closely spaced, we ... -
Effect of Side Feed Pressurization on the Dynamic Performance of Gas Foil Bearings: A Model Anchored to Test Data
(The American Society of Mechanical Engineers (ASME), 2009)Comprehensive modeling of gas foil bearings (GFBs) anchored to reliable test data will enable the widespread usage of these bearings into novel high speed turbomachinery applications. GFBs often ... -
High Temperature Radiation Heat Transfer Performance of Thermal Barrier Coatings With Multiple Layered Structures
(The American Society of Mechanical Engineers (ASME), 2009)Meeting the demands for ever increasing operating temperatures in gas turbines requires concurrent development in cooling technologies, new generations of superalloys, and thermal barrier coatings ... -
A Generalized Likelihood Ratio Test for Adaptive Gas Turbine Performance Monitoring
(The American Society of Mechanical Engineers (ASME), 2009)Kalman filters are widely used in the turbine engine community for health monitoring purposes. This algorithm has proven its capability to track gradual deterioration with good accuracy. On the ... -
Wide Gap Braze Repair Using Vertically Laminated Repair Scheme
(The American Society of Mechanical Engineers (ASME), 2009)Repair of after-service gas turbine hot section superalloy components provides considerable saving in life-cycle cost of engines. Whereas a number of methods have been used in the past to repair ... -
Comparison of Unsteady Reynolds Averaged Navier–Stokes and Large Eddy Simulation Computational Fluid Dynamics Methodologies for Air Swirl Fuel Injectors
(The American Society of Mechanical Engineers (ASME), 2009)It is well documented that various large-scale quasiperiodic flow structures, such as a precessing vortex core (PVC) and multiple vortex helical instabilities, are present in the swirling flows ... -
Cyclic Carbonation Calcination Studies of Limestone and Dolomite for CO2 Separation From Combustion Flue Gases
(The American Society of Mechanical Engineers (ASME), 2009)Naturally occurring limestone and dolomite samples, originating from different geographical locations, were tested as potential sorbents for carbonation/calcination based CO2 capture from combustion ... -
The Performance Evaluation With Diffuser Geometry Variations of the Centrifugal Compressor in a Marine Engine (70MW) Turbocharger
(The American Society of Mechanical Engineers (ASME), 2009)An examination of the condition of the flow leaving the impeller exit kinetic energy often accounts for 30–50% of the shaft work input to the compressor stage; for energy efficiency, it is ... -
Optimal Mission Analysis Accounting for Engine Aging and Emissions
(The American Society of Mechanical Engineers (ASME), 2009)An aircraft mission analysis procedure, accounting for engine aging deterioration and incorporating emission estimation capability, is presented. It consists of three main modules: a flight simulation ... -
Radiation Benchmarking in a Model Combustor
(The American Society of Mechanical Engineers (ASME), 2009)Radiation heat transfer in a model combustor with interior and exterior conjugate heat transfers has been numerically studied. The previous investigations on turbulence, combustion, and scalar ... -
Air/Water Counter-Current Flow Experiments in a Model of the Hot Leg of a Pressurized Water Reactor
(The American Society of Mechanical Engineers (ASME), 2009)Different scenarios of small break loss of coolant accident for pressurized water reactors (PWRs) lead to the reflux-condenser mode in which steam enters the hot leg from the reactor pressure ... -
Numerical Prediction and Optimization of Depressurized Sodium-Water Reaction Experiment With Counterflow Diffusion Flame
(The American Society of Mechanical Engineers (ASME), 2009)Sodium-water reaction (SWR) is a design basis accident of a sodium-cooled fast reactor (SFR). A breach of the heat transfer tube in a steam generator results in contact of liquid sodium with ... -
On Moore’s Law and Its Application to Spark Ignition Engine Technology
(The American Society of Mechanical Engineers (ASME), 2009)Moore’s law relates how the integration of semiconductors has progressed in time. This research shows that the exponential trend shown in the electronics manufacturing industry can have applications ... -
Transient Three-Dimensional Stability Analysis of Supercritical Water Reactor Rod Bundle Subchannels by a Computatonal Fluid Dynamics Code
(The American Society of Mechanical Engineers (ASME), 2009)The paper describes the application of computational fluid dynamics (CFD) in simulating density wave oscillations in triangular and square pitch rod bundles. The FLUENT code is used for this ...