Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2901-2920 of 9564
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Estimation of Forcing Function for a Geometrically Mistuned Bladed Rotor Via Modified Modal Domain Analysis
(The American Society of Mechanical Engineers (ASME), 2016)Modified modal domain analysis (MMDA) is a method to generate an accurate reducedorder model (ROM) of a bladed disk with geometric mistuning. An algorithm based on the MMDA ROM and a state observer is developed to estimate ... -
Three Dimensional Blade Stacking Strategies and Understanding of Flow Physics in Low Pressure Steam Turbines—Part I: Three Dimensional Stacking Mechanisms
(The American Society of Mechanical Engineers (ASME), 2016)Optimization of blade stacking in the last stage of lowpressure (LP) steam turbines constitutes one of the most delicate and timeconsuming parts of the design process. This is the first of two papers focusing on the stacking ... -
Numerical Comparison of Rotordynamic Characteristics for a Fully Partitioned Pocket Damper Seal and a Labyrinth Seal With High Positive and Negative Inlet Preswirl
(The American Society of Mechanical Engineers (ASME), 2016)Pocket damper seals (PDSs) are used as replacements for labyrinth seals in highpressure centrifugal compressors at the balancepiston location or center seal location to enhance rotordynamic stability. A concern exists that ... -
Numerical and Experimental Investigation on the Effect of Swirl Brakes on the Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2016)Swirl brake influences the static and rotordynamic characteristics of labyrinth seal which are important in the prediction of turbomachine stability. To study the influence of the swirl brakes on improving seal stability, ... -
Undergraduate Project in Compressor Rig Design, Fabrication, and Testing for Complete Engineering Training
(The American Society of Mechanical Engineers (ASME), 2016)An ambitious project in propulsion was introduced as part of the finalyear integrator project offerings of the mechanical and aerospace engineering programs at أ‰cole Polytechnique de Montrأ©al in 2011–2012. It has been ... -
Low NOx Lean Premix Reheat Combustion in Alstom GT24 Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2016)Reducing gas turbine emissions and increasing their operational flexibility are key targets in today's gas turbine market. In order to further reduce emissions and increase the operational flexibility of its GT24 (60 Hz) ... -
Reduced Order Modeling of Aeroacoustic Systems for Stability Analyses of Thermoacoustically Noncompact Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2016)A methodology is presented to model noncompact thermoacoustic phenomena using reducedorder models (ROMs) based on the linearized Navier–Stokes equations (LNSEs). The method is applicable to geometries with a complex flow ... -
Optimization of an Algorithm for the Measurement of Unsteady Flow Rates in High Pressure Pipelines and Application of a Newly Designed Flowmeter to Volumetric Pump Analysis
(The American Society of Mechanical Engineers (ASME), 2016)An innovative, efficient, and robust algorithm is presented for the evaluation of the instantaneous flowrate in highpressure liquid flow pipelines. This algorithm is based on the pressure time histories measured at two ... -
Discussion: “Experience With Throat-Tap Nozzles for Accurate Flow Measurement” (Cotton, K. C., Carcich, J. A., and Schofield, P., 1972, ASME J. Eng. Power, 94, pp. 133–137)
(The American Society of Mechanical Engineers (ASME), 1972) -
Evaluation of Two Measurement Techniques to Quantify Fuel–Air Mixing of a Gas Turbine Premixer at Atmospheric Conditions
(The American Society of Mechanical Engineers (ASME), 2016)In the present study, two measurement techniques are adopted to evaluate the fuel–air mixing under atmospheric conditions using an industrial fuel–air premixer. These techniques are CO2 mixing and planar laser induced ... -
Investigation of Flow Aerodynamics for Optimal Fuel Placement and Mixing in the Radial Swirler Slot of a Dry Low Emission Gas Turbine Combustion Chamber
(The American Society of Mechanical Engineers (ASME), 2016)This paper is concerned with optimizing the fuel–air mixing processes that take place within the radial swirler slot of a dry low emission (DLE) combustion system. The aerodynamics of the flow within the slot is complex ... -
Experimental Results and Computational Fluid Dynamics Simulations of Labyrinth and Pocket Damper Seals for Wet Gas Compression
(The American Society of Mechanical Engineers (ASME), 2016)The most recent development in centrifugal compressor technology is toward wet gas operating conditions. This means the centrifugal compressor has to manage a liquid phase which is varying between 0% and 3% liquid volume ... -
Brush Seals Used in Steam Environments—Chronological Wear Development and the Impact of Different Seal Designs
(The American Society of Mechanical Engineers (ASME), 2016)During the last decades, turbo machine efficiency was considerably increased by using more efficient seals. Brush seals, as a compliant contacting filament seal, have become an attractive alternative to conventional labyrinth ... -
NOx Behavior for Lean Premixed Combustion of Alternative Gaseous Fuels
(The American Society of Mechanical Engineers (ASME), 2016)Gaseous fuels other than pipeline natural gas are of interest in highintensity premixed combustors (e.g., leanpremixed gas turbine combustors) as a means of broadening the range of potential fuel resources and increasing ... -
Transient Analysis of Gas Expanded Lubrication and Rotordynamic Performance in a Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2016)Gasexpanded lubricants (GELs) have the potential to increase bearing energy efficiency, longterm reliability, and provide for a degree of control over the rotordynamics of highspeed rotating machines. Previous work has ... -
Three Dimensional LEFM Prediction of Fatigue Crack Propagation in a Gas Turbine Disk Material at Component Near Conditions
(The American Society of Mechanical Engineers (ASME), 2016)In this paper, the possibility to use linear elastic fracture mechanics (LEFM), with and without a superimposed residual stress field, to predict fatigue crack propagation in the gas turbine disk material Inconel 718 has ... -
أ‰tude on Gas Turbine Combined Cycle Power Plant—Next 20 Years
(The American Society of Mechanical Engineers (ASME), 2016)In 1992, United States Department of Energy's (DOE) Advanced Turbine Systems (ATS) program established a target of 60% efficiency for utility scale gas turbine (GT) power plants to be achieved by the year 2000. Although ... -
Low Emission, Liquid Fuel Combustion System for Conventional and Alternative Fuels Developed by the Scaling Analysis
(The American Society of Mechanical Engineers (ASME), 2016)The objective of this study is to develop a theoretical basis for scalability considerations and design of a largescale combustor utilizing flow blurring (FB) atomization. FB atomization is a recently discovered twinfluid ... -
Experimental Investigation on the Wake Characteristics and Aeromechanics of Dual Rotor Wind Turbines
(The American Society of Mechanical Engineers (ASME), 2016)An experimental study was carried out to investigate the aeromechanics and wake characteristics of dualrotor wind turbines (DRWTs) in either corotating or counterrotating configuration, in comparison to those of a conventional ... -
Performance of Compressor Blade Rows in a Sloping Flowpath
(The American Society of Mechanical Engineers (ASME), 1972)In an effort to reduce engine length and weight it is desirable in some applications, such as high bypass ratio turbofan engines, to introduce compressor stages into a downward sloping flowpath. ...