Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4561-4580 of 9564
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Computational Fluid Dynamics Simulation of Fouling on Axial Compressor Stages
(The American Society of Mechanical Engineers (ASME), 2010)Three-dimensional numerical simulations of the effect of fouling on an axial compressor stage were carried out. As a case study, the NASA Stage 37 was considered for the numerical investigation, ... -
The Efficiency of Turbocharger Compressors With Diabatic Flows
(The American Society of Mechanical Engineers (ASME), 2010)In most compressors the flow is adiabatic, but in low-speed turbochargers, the compression process has both heat transfer and work input. This paper examines different compressor efficiency ... -
Synthesized Synchronous Sampling Technique for Differential Bearing Damage Detection
(The American Society of Mechanical Engineers (ASME), 2010)The differential bearing between the low-pressure turbine (LPT) and high-pressure turbine (HPT) shafts is one of the most vulnerable parts in a turbomachinery engine. Unfortunately, it is also ... -
Parametric Thermodynamic Analysis of a Solid Oxide Fuel Cell Gas Turbine System Design Space
(The American Society of Mechanical Engineers (ASME), 2010)A parametric study of a solid oxide fuel cell-gas turbine (SOFC-GT) hybrid system design is conducted with the intention of determining the thermodynamically based design space constrained by ... -
Probabilistic Fretting Fatigue Assessment of Aircraft Engine Disks
(The American Society of Mechanical Engineers (ASME), 2010)Fretting fatigue is a random process that continues to be a major source of damage associated with the failure of aircraft gas turbine engine components. Fretting fatigue is dominated by the ... -
An Experimental and Computational Study of a Swirl-Stabilized Premixed Flame
(The American Society of Mechanical Engineers (ASME), 2010)An unconfined strongly swirled flow is investigated for different Reynolds numbers using particle image velocimetry (PIV) and large eddy simulation (LES) with a thickened-flame (TF) model. Both ... -
A Statistical Approach to Spark Advance Mapping
(The American Society of Mechanical Engineers (ASME), 2010)Engine performance and efficiency are largely influenced by combustion phasing. Operating conditions and control settings influence the combustion development over the crankshaft angle; the most ... -
Air Separation Membranes: An Alternative to EGR in Large Bore Natural Gas Engines
(The American Society of Mechanical Engineers (ASME), 2010)Air separation membranes (ASMs) could potentially replace exhaust gas recirculation (EGR) technology in engines due to the proven benefits in NOx reduction but without the drawbacks of EGR. ... -
Implementation of a Pressure Drop Model for the CFD Simulation of Clogged Containment Sump Strainers
(The American Society of Mechanical Engineers (ASME), 2010)The present study aims at modeling the pressure drop of flows through growing cakes of compressible fibrous materials, which may form on the upstream side of containment sump strainers after ... -
HCCI Engine Combustion Phasing Prediction Using a Symbolic-Statistics Approach
(The American Society of Mechanical Engineers (ASME), 2010)Temporal dynamics of cyclic variation in a homogeneous charge compression ignition (HCCI) engine near misfire is analyzed using chaotic theory methods. The analysis of variation in consecutive ... -
Development and Validation of a Thickened Flame Modeling Approach for Large Eddy Simulation of Premixed Combustion
(The American Society of Mechanical Engineers (ASME), 2010)The development of a dynamic thickened flame (TF) turbulence-chemistry interaction model is presented based on a novel approach to determine the subfilter flame wrinkling efficiency. The basic ... -
Characterization of Partially Premixed Combustion With Ethanol: EGR Sweeps, Low and Maximum Loads
(The American Society of Mechanical Engineers (ASME), 2010)Exhaust gas recirculation (EGR) sweeps were performed on ethanol partially premixed combustion (PPC) to show different emission and efficiency trends as compared with diesel PPC. The sweeps showed ... -
Comparison of the Flow Field of a Swirl Stabilized Premixed Burner in an Annular and a Single Burner Combustion Chamber
(The American Society of Mechanical Engineers (ASME), 2010)An experimental investigation of the flow field of a 12 burner annular combustor and a single burner combustor with the same burner was performed. It has revealed the aerodynamic effect, which ... -
Parameter Based Combustion Model for Large Prechamber Gas Engines
(The American Society of Mechanical Engineers (ASME), 2010)Challenging requirements for modern large engines regarding power output, fuel consumption, and emissions can only be achieved with carefully adapted combustion systems. With the improvement of ... -
Quantification of the Long-Term Performance of Steels T91 and 316L in Oxygen-Containing Flowing Lead-Bismuth Eutectic at 550°C
(The American Society of Mechanical Engineers (ASME), 2010)The long-term performance of ferritic/martensitic steel T91 and austenitic 316L in oxygen-containing flowing lead-bismuth eutectic at 550°C was investigated by exposing the materials for up ... -
Probabilistic Treatment of Crack Nucleation and Growth for Gas Turbine Engine Materials
(The American Society of Mechanical Engineers (ASME), 2010)The empirical models commonly used for probabilistic life prediction do not provide adequate treatment of the physical parameters that characterize fatigue damage development. For these models, ... -
Multiharmonic Forced Response Analysis of a Turbine Blading Coupled by Nonlinear Contact Forces
(The American Society of Mechanical Engineers (ASME), 2010)In turbomachinery applications, the rotating turbine blades are subjected to high static and dynamic loads. The static loads are due to centrifugal stresses and thermal strains whereas the dynamic ... -
Rotordynamic Analysis of a Large Industrial Turbocompressor Including Finite Element Substructure Modeling
(The American Society of Mechanical Engineers (ASME), 2010)A rotordynamic analysis of a large turbocompressor that models both the casing and supports along with the rotor-bearing system was performed. A 3D finite element model of the casing captures ... -
Experimental and Numerical Studies on Nonlinear Dynamic Behavior of Rotor System Supported by Ball Bearings
(The American Society of Mechanical Engineers (ASME), 2010)Ball bearings are important mechanical components in high-speed turbomachinery that is liable for severe vibration and noise due to the inherent nonlinearity of ball bearings. Using experiments ... -
Centrifugal Compressor Stability Prediction Using a New Physics Based Approach
(The American Society of Mechanical Engineers (ASME), 2010)The accurate prediction of centrifugal compressor stability continues to be an important area of interest in the oil and gas industries. Ensuring stability is critical to the cost-effective ...