Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4041-4060 of 9564
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Reduction of Combustion Gases’ Temperature and Heating Capacity by CO2 and H2 O Dissociation and NO Formation
(The American Society of Mechanical Engineers (ASME), 2012)The combustion gases theoretical adiabatic temperatures are reduced to equilibrium temperatures mainly because of the endothermic reactions of CO2 and H2 O dissociation and NO formation. Therefore, ... -
Assessment of Low Cycle Fatigue Life of Steam Turbine Rotor Based on a Thermodynamic Approach
(The American Society of Mechanical Engineers (ASME), 2012)A new nonlinear model is proposed to assess the low cycle fatigue life of a 300 MW steam turbine rotor. Manson-Coffin equation and cyclic stress-strain relationship are employed to eliminate ... -
Effects of Target Size on Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Steel Ball Projectiles
(The American Society of Mechanical Engineers (ASME), 2012)Foreign object damage (FOD) phenomena of two gas-turbine grade silicon nitrides (AS800 and SN282) were assessed at ambient temperature applying impact velocities from 20 to 300 m/s using 1.59-mm ... -
Assessment of Current Chemiluminescence Kinetics Models at Engine Conditions
(The American Society of Mechanical Engineers (ASME), 2012)Chemiluminescence continues to be of interest as a cost-effective optical diagnostic for gas turbine combustor health monitoring. However, most chemical kinetics mechanisms of the chemiluminescence ... -
The Effect of the Location of Nucleation Sites on the Thermal-Hydraulic Stability of a Short-Tube Natural Circulation Loop
(The American Society of Mechanical Engineers (ASME), 2012)The use of small two-phase natural circulation loops is an attractive option for efficient cooling applications and innovative steam generators. An experimental study was conducted to examine how ... -
Characterizing Diesel Fuel Spray Cone Angle From Back-Scattered Imaging by Fitting Gaussian Profiles to Radial Spray Intensity Distributions
(The American Society of Mechanical Engineers (ASME), 2012)Quantifying fuel spray properties including penetration, cone angle, and vaporization processes sheds light on fuel-air mixing phenomenon, which governs subsequent combustion and emissions formation ... -
Advanced Combined Cycle Systems Based on Methanol Indirect Combustion
(The American Society of Mechanical Engineers (ASME), 2012)In this paper, two new combined cycle systems with/without CO2 capture based on methanol indirect combustion are developed, which have significantly higher efficiency than methanol fueled conventional ... -
A Study of the Effects of Biofuel Use on Piston Lubrication During Fuel Post Injection in a Direct Injection Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2012)The reduction of both exhaust gases and carbon dioxide emissions is necessary to meet future emissions regulations for diesel engines. Exhaust after-treatment devices are gradually being applied ... -
Development of Al-Alloy Coating for Advanced Nuclear Systems Using Lead Alloys
(The American Society of Mechanical Engineers (ASME), 2012)Small and medium reactors using lead alloys as coolants are one of the promising reactor concepts with improved safety because of their thermal-physical and chemical properties. This paper focuses ... -
Quick Response Fuel Injector for Direct-Injection Gasoline Engines
(The American Society of Mechanical Engineers (ASME), 2012)We developed a new injector for direct injection gasoline engines that reduce the exhaust emissions and help to reduce fuel consumption. The newly developed actuator in this injector has two ... -
Probabilistic High-Cycle Fretting Fatigue Assessment of Gas Turbine Engine Components
(The American Society of Mechanical Engineers (ASME), 2012)High-cycle fatigue (HCF) is arguably one of the costliest sources of in-service damage in military aircraft engines. HCF of turbine blades and disks can pose a significant engine risk because ... -
A High Temperature High Bandwidth Fast Response Total Pressure Probe for Measurements in a Multistage Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2012)Over the last decades, fast response aerodynamic probes have been recognized as a robust measurement technique to provide time-resolved flow field data in turbomachinery environments. Still, most ... -
Diesel Injector Coking: Optical-Chemical Analysis of Deposits and Influence on Injected Flow-Rate, Fuel Spray and Engine Performance
(The American Society of Mechanical Engineers (ASME), 2012)The physical origin of injector coking in diesel engines has been clarified and the most critical design parameters and operating variables pertaining to the occurrence of the phenomenon have ... -
Prediction of Rotordynamic Coefficients for Short Labyrinth Gas Seals Using Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2012)The analysis is presented for the computational fluid dynamics (CFD)-based modeling of short labyrinth gas seals. Seal leakage performance can be reliably predicted with CFD for a wide operating ... -
Analytical Investigation of the Effects of Induction Motor Transients on Compressor Drive Shafts
(The American Society of Mechanical Engineers (ASME), 2012)Centrifugal compressors driven by induction motors are most common in the turbomachinery industry. When sudden transients occur in the driver due to upsets in electrical supply to the motor, ... -
In-Flight Isolation of Degraded Engine Components by Shape Comparison of Transient Outputs
(The American Society of Mechanical Engineers (ASME), 2012)A direct method of aircraft engine health monitoring is introduced that can isolate a degraded engine component in-flight. The method utilizes continuous wavelet transformations of transient engine ... -
Establishment of Nonlinear Dynamic Model for Prediction of Rotordynamic Instability of Steam Turbine Rotor-Bearing System Caused by Partial Admission
(The American Society of Mechanical Engineers (ASME), 2012)A nonlinear dynamic model is developed for a rotor-bearing system with radial steam force due to partial admission, taking into account the prediction of subsynchronous instability of a steam ... -
Open-Loop Control of Combustion Instabilities and the Role of the Flame Response to Two-Frequency Forcing
(The American Society of Mechanical Engineers (ASME), 2012)Controlling combustion instabilities by means of open-loop forcing at non-resonant frequencies is attractive because neither a dynamic sensor signal nor a signal processor is required. On the ... -
Experimental Study on Characteristics of Methane–Coal-Dust Mixture Explosion and Its Mitigation by Ultra-Fine Water Mist
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents the results of an experimental investigation on the characteristics of methane–coal-dust mixture explosion and its mitigation by ultra-fine water mist. Four E12-1-K-type fast ... -
Erratum: “Air/Water Counter-Current Flow Experiments in a Model of the Hot Leg of a Pressurized Water Reactor” [Journal of Engineering for Gas Turbines and Power, 2009, 131(2), p. 022905]
(The American Society of Mechanical Engineers (ASME), 2012)An error in the implementation into the test facility of the air flow meter used during the experiments was noticed after publication of the paper. As a consequence, the raw flow rates ...