Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4161-4180 of 9564
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Assessing Alternative Fuels for Helicopter Operation
(The American Society of Mechanical Engineers (ASME), 2012)At present, nearly 100% of aviation fuel is derived from petroleum using conventional and well known refining technology. However, the fluctuations of the fuel price and the vulnerability of ... -
Effects of Outlet Boundary Conditions on the Reacting Flow Field in a Swirl-Stabilized Burner at Dry and Humid Conditions
(The American Society of Mechanical Engineers (ASME), 2012)During the design and testing process of swirl-stabilized combustors, it is often impractical to maintain identical outlet boundary conditions. Furthermore, it is a common practice to intentionally ... -
Effects of Core Flow Swirl on the Flow Characteristics of a Scalloped Forced Mixer
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents a detailed experimental investigation of the influence of core flow swirl on the mixing and performance of a scaled turbofan mixer with 12 scalloped lobes. Measurements were ... -
Tilting Pad Journal Bearings—A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot
(The American Society of Mechanical Engineers (ASME), 2012)For several years, researchers have presented predictions showing that using a full tilting-pad journal bearing (TPJB) model (retaining all of the pad degrees of freedom) is necessary to accurately ... -
Rotor Model Updating and Validation for an Active Magnetic Bearing Based High-Speed Machining Spindle
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents an experimentally driven model updating approach to address the dynamic inaccuracy of the nominal finite element (FE) rotor model of a machining spindle supported on active ... -
Effect of Flow Inclination on Wind Turbine Performance
(The American Society of Mechanical Engineers (ASME), 2012)This work examines the effect of flow inclination on the performance of a stand-alone wind turbine and of wind turbines operating in the wakes of upstream turbines. The experimental portion ... -
Understanding the Acoustic Oscillations Observed in the Injection Rate of a Common-Rail Direct Injection Diesel Injector
(The American Society of Mechanical Engineers (ASME), 2012)Measuring the rate of injection of a common-rail injector is one of the first steps for diesel engine development. The injected quantity as a function of time is of prime interest for engine ... -
Determination of Thermal Barrier Coatings Average Surface Temperature After Engine Operation for Lifetime Validation
(The American Society of Mechanical Engineers (ASME), 2012)Assessment of ex-service parts is important for the power generation industry. It gives us the opportunity to correlate part conditions to specific operating conditions like fuel used, local ... -
Comparison Between Numerical and Experimental Dynamic Coefficients of a Hybrid Aerostatic Bearing
(The American Society of Mechanical Engineers (ASME), 2012)Hybrid journal bearings have been considered for many years as a possible replacement for ball bearings in turbopumps used by the aerospace industry. Due to flow regimes dominated by inertia ... -
Measurement Versus Predictions of Rotordynamic Coefficients of a Hole-Pattern Gas Seal With Negative Preswirl
(The American Society of Mechanical Engineers (ASME), 2012)Test results are presented for the rotordynamic coefficients of a hole-pattern annular gas seal at supply pressures to 84 bar and running speeds to 20200 rpm. The principal test variable of ... -
Modeling of Flange Joints for the Nonlinear Dynamic Analysis of Gas Turbine Engine Casings
(The American Society of Mechanical Engineers (ASME), 2012)The finite element analysis of individual components of aircraft engine casings provides high accuracy and a good agreement with the measured response data. However, when these components are ... -
Hole-Pattern and Honeycomb Seal Rotordynamic Forces: Validation of CFD-Based Prediction Techniques
(The American Society of Mechanical Engineers (ASME), 2012)This paper deals with modeling of hole-pattern and honeycomb seals. These are frequently used as balance piston seals in high pressure centrifugal compressor applications as they have the potential ... -
Life Prediction for Turbopropulsion Systems Under Dwell Fatigue Conditions
(The American Society of Mechanical Engineers (ASME), 2012)The objective of this investigation was to develop an innovative methodology for life and reliability prediction of hot-section components in advanced turbopropulsion systems. A set of three ... -
Solar Hybrid Combined Cycle Performance Prediction Influence of Gas Turbine Model and Spool Arrangements
(The American Society of Mechanical Engineers (ASME), 2012)A modeling procedure was developed to simulate design and off-design operation of hybrid solar gas turbines in a combined cycle (CC) configuration. The system includes a heliostat field, a ... -
Algae Based Hydroprocessed Fuel Use on a Marine Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2012)The Naval Surface Warfare Center, Carderock Division (NSWCCD) Philadelphia conducted a full scale gas turbine engine test using Rolls Royce engine models 501-K34 and 250-KS4 to assess engine ... -
Computational Fluid Dynamics of a Radial Compressor Operating With Supercritical CO2
(The American Society of Mechanical Engineers (ASME), 2012)The merit of using supercritical CO2(scCO2) as the working fluid of a closed Brayton cycle gas turbine is now widely recognized, and the development of this technology is now actively pursued. ... -
Experimental Investigation on the Forced Response of a Dummy Counter-Rotating Turbine Stage With Friction Damping
(The American Society of Mechanical Engineers (ASME), 2012)The paper shows the results of the experimental activity about the dynamics of a stage of a counter-rotating turbine of an open rotor architecture engine. The tests presented here explore the ... -
Thrust Control of Small Turbojet Engines Using Fuzzy Logic: Design and Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2012)The aim of this paper is to propose an effective technique which employs a proportional-integral Fuzzy logic controller for the thrust regulation of small scale turbojet engines, capable of ... -
Impact of Cooling Air Injection on the Primary Combustion Zone of a Swirl Burner
(The American Society of Mechanical Engineers (ASME), 2012)In most dry, low NOx combustor designs, the front panel impingement cooling air is directly injected into the combustor primary zone. As this air partially mixes with the swirling flow of ... -
Experimental Study on Combustion Characteristics of Conventional and Alternative Liquid Fuels
(The American Society of Mechanical Engineers (ASME), 2012)Gas turbine combustor design relies strongly on the turbulent flame velocity over the whole turbine operation range. Due to the fact that turbulent flame velocity depends strongly on the laminar ...