Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4021-4040 of 9564
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Fuel Property Effects on PCCI Combustion in a Heavy-Duty Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2012)An experimental study was performed to investigate fuel property effects on premixed charge compression ignition (PCCI) combustion in a heavy-duty diesel engine. A matrix of research diesel fuels ... -
Estimating the Probabilistic Size and Shape Distributions of 3D Anomalies From Sectioning Measurements Using the Stereological Unfolding Approach
(The American Society of Mechanical Engineers (ASME), 2012)The accuracy of probabilistic risk assessment of rotor disks is strongly dependent on the accurate description of the size and shape distributions of anomalies in alloys. These size-shape ... -
Analytic Modeling of Floating Ring Annular Seals
(The American Society of Mechanical Engineers (ASME), 2012)In order to avoid contact between the vibrating rotor and the stator, annular seals are designed with a relatively large radial clearance (∼100 μm) and, therefore, have an important leakage. ... -
Coupled Thermomechanical Fatigue Tests for Simulating Load Conditions in Cooled Turbine Parts
(The American Society of Mechanical Engineers (ASME), 2012)Modern heavy-duty gas turbines operate under hot gas temperatures that are much higher than the temperature capability of nickel superalloys. For that reason, advanced cooling technology is applied ... -
The Effect of Tilting Pad Journal Bearing Dynamic Models on the Linear Stability Analysis of an 8-Stage Compressor
(The American Society of Mechanical Engineers (ASME), 2012)Rotordynamic instability, a self-excited vibration phenomenon, can lead to equipment failures, reduced production rates, and expensive redesign. Properly characterizing the stability response of ... -
Numerical Characterization of Aerodynamic Losses of Jet Arrays for Gas Turbine Applications
(The American Society of Mechanical Engineers (ASME), 2012)Jet array is an arrangement typically used to cool several gas turbine parts. Some examples of such applications can be found in the impingement cooled region of gas turbine airfoils or in ... -
Measured Static and Rotordynamic Coefficient Results for a Rocker-Pivot, Tilting-Pad Bearing With 50 and 60% Offsets
(The American Society of Mechanical Engineers (ASME), 2012)Static and rotordynamic coefficients are measured for a rocker-pivot, tilting-pad journal bearing (TPJB) with 50 and 60% offset pads in a load-between-pad (LBP) configuration. The bearing uses ... -
Computational Fluid Dynamics Simulations of Flow and Heat Transfer in a Preswirl System: Influence of Rotating-Stationary Domain Interface
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents computational fluid dynamics (CFD) predictions of flow and heat transfer for an over-swirled low-radius preswirl system and comparison with experimental data. The rotor-stator ... -
Experimental and Analytical Study on the Operation Characteristics of the AHAT System
(The American Society of Mechanical Engineers (ASME), 2012)Operational flexibility, such as faster start-up time or faster load change rate, and higher thermal efficiency, have become more and more important for recent thermal power systems. The advanced ... -
The Expansion-Cycle Evaporation Turbine
(The American Society of Mechanical Engineers (ASME), 2012)This paper investigates a continuous-flow heat engine based on evaporative cooling of hot air at reduced pressure. In this device, hot air is expanded in an expansion turbine, spray-cooled to ... -
Compressor Fouling Modeling: Relationship Between Computational Roughness and Gas Turbine Operation Time
(The American Society of Mechanical Engineers (ASME), 2012)Gas turbine axial compressor performance is heavily influenced by blade fouling. As a result, the gas turbines efficiency and producible power output decrease. Performance degradation of an axial ... -
Extended Three-Dimensional Thermo-Hydrodynamic Model of Radial Foil Bearing: Case Studies on Thermal Behaviors and Dynamic Characteristics in Gas Turbine Simulator
(The American Society of Mechanical Engineers (ASME), 2012)Environment-friendly microturbomachinery has its broad current and future applications in fuel cells, power generation, oil-free industrial blowers and compressors, small aero propulsions engines for ... -
Passive Control of Noise and Instability in a Swirl-Stabilized Combustor With the Use of High-Strength Porous Insert
(The American Society of Mechanical Engineers (ASME), 2012)Swirl-stabilized combustion and porous inert medium (PIM) combustion are two methods that have been used extensively, although independently, for flame stabilization. In this study, the two concepts ... -
Hydroprocessed Renewable Jet Fuel Evaluation, Performance, and Emissions in a T63 Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2012)Due to potential beneficial environmental impacts and increased supply availability, alternative fuels derived from renewable resources are evolving on the forefront as unconventional substitutes ... -
Application of Pseudo-Poincaré Maps to Assess Gas Turbine System Health
(The American Society of Mechanical Engineers (ASME), 2012)The transition between two operational modes in a dynamic system often occurs under strict measures such that repeatability is more a target than a metric for performance evaluations. The concept ... -
Displacement Speed Statistics for Stratified Mixture Combustion in an Igniting Turbulent Planar Jet
(The American Society of Mechanical Engineers (ASME), 2012)The statistics of the density-weighted displacement speed of the reaction progress variable c isosurfaces for stratified mixture combustion arising from localized ignition in a turbulent planar ... -
Fuel Flexibility in LM2500 and LM6000 Dry Low Emission Engines
(The American Society of Mechanical Engineers (ASME), 2012)The LM2500 and LM6000 dry-low-emissions aeroderivative gas turbine engines have been in commercial service for 15 years and have accumulated nearly 10 × 106 hours of commercial operation. ... -
Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion
(The American Society of Mechanical Engineers (ASME), 2012)This work explores the dynamic stability characteristics of premixed CH4 /O2 /CO2 mixtures in a 50 kW swirl stabilized combustor. In all cases, the methane-oxygen mixture is stoichiometric, with ... -
The Port Width and Position Determination for Pressure-Exchange Ejector
(The American Society of Mechanical Engineers (ASME), 2012)A pressure-exchange ejector transferring energy by compression and expansion waves has the potential for higher efficiency. The width and position of each port are essential in pressure-exchange ... -
Oxidative Activity of Hydrogen on Nickel and Inconel
(The American Society of Mechanical Engineers (ASME), 2012)Experiments were carried out to determine whether nickel or Inconel are catalytically active for hydrogen oxidation. The work was motivated by the problem of flame flashback and/or inlet preignition ...