Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3221-3240 of 9564
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Spatial Analysis on Forced Heat Release Response of Turbulent Stratified Flames
(The American Society of Mechanical Engineers (ASME), 2015)The local equivalence ratio distribution in a flame affects its shape and response under velocity perturbations. The forced heat release response of stratified leanpremixed flames to acoustic velocity fluctuations is ... -
Experimental Validation of Numerically Optimized Short Annular Diffusers
(The American Society of Mechanical Engineers (ASME), 2015)Short annular diffusers with negative wall angles were evaluated numerically and experimentally with up to 40 deg inlet swirl at an inlet Reynolds number of Ret ≈ 1.4 أ— 105 and Mach number of Mt ≈ 0.16. The 80% ... -
Development of a New Skeletal Chemical Kinetic Mechanism for Ethanol Reference Fuel
(The American Society of Mechanical Engineers (ASME), 2015)A new skeletal chemical kinetic mechanism of ethanol reference fuel (including ethanol, isooctane, nheptane, and toluene combustion mechanisms) consisting of 62 species and 194 reactions is developed for oxidation and ... -
Advanced Catalytic Igniters Technology for Small Compact Engine Applications
(The American Society of Mechanical Engineers (ASME), 2015)Development of technologies that allow small, high power density engines such as unmanned aerial vehicles (UAV), unmanned marine vehicles (UMV), and unmanned ground vehicles (UGV) to operate on single logistic fuel such ... -
Study of Temperature Effect on Servovalve Controlled Fuel Metering Unit
(The American Society of Mechanical Engineers (ASME), 2015)It is usual that fuel system of an aeroengine operates within a wide range of temperatures. As a result, this can have effect on both the characteristics and precision of fuel metering unit (FMU), even on the performance ... -
Accounting for Unsteady Interaction in Transonic Stages
(The American Society of Mechanical Engineers (ASME), 2015)This paper discusses the importance of the unsteady interaction in transonic turbomachinery stages. Although the flow in a turbomachine is inherently unsteady, most current calculations for routine design work exploit the ... -
Predictions of Operational Degradation of the Fan Stage of an Aircraft Engine Due to Particulate Ingestion
(The American Society of Mechanical Engineers (ASME), 2015)A numerical evaluation of the effects of volcanic ash ingestion in a turbofan engine was carried out, with particular regard to the prediction of the erosion damage to fan blades. The ash concentration level examined in ... -
An Experimental Investigation of the Influence of Flash Back Flow on Last Three Stages of Low Pressure Steam Turbines
(The American Society of Mechanical Engineers (ASME), 2015)A shutdown operation of a large size steam turbine could possibly cause flashing phenomena of the pooled drain water in lowpressure heaters. The boiled steam is sometimes in the same amount as the main flow in the case ... -
Test Results and Analytical Predictions for MIL STD 167 Vibration Testing of a Direct Drive Compressor Supported on Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2015)External vibration testing was performed on a semihermetic, direct drive compressor on magnetic bearings intended for U.S. Navy Shipboard use. The compressor was placed on a U.S. Navy MILSTD167 shaker platform and driven ... -
Stability of a Cracked Rotor Subjected to Parametric Excitation
(The American Society of Mechanical Engineers (ASME), 2015)It is well known that parametric vibrations may appear during the rotation of a rotor with a cracked shaft. The vibrations occur due to periodic stiffness changes being the result of the crack breathing. A parametrically ... -
Quantification of Foreign Object Damage and Electrical Resistivity for Ceramic Matrix Composites and Tensile Residual Strength Prediction
(The American Society of Mechanical Engineers (ASME), 2015)SiCbased ceramic matrix composites (CMC) in turbine engine applications must sustain certain foreign object impacts (FOIs) that might occur in services. Experiments and nondestructive evaluation (NDE) have illustrated good ... -
An All Metal Compliant Seal Versus a Labyrinth Seal: A Comparison of Gas Leakage at High Temperatures
(The American Society of Mechanical Engineers (ASME), 2015)Parasitic secondary flows (seals' leakage) in centrifugal compressors and gas and steam turbines represent a substantial loss in efficiency and power delivery with an increase in specific fuel consumption. Labyrinth seals ... -
Aeromechanical Modeling of Rotating Fan Blades to Investigate High Cycle and Low Cycle Fatigue Interaction
(The American Society of Mechanical Engineers (ASME), 2015)Gas turbine engine components are subject to both lowcycle fatigue (LCF) and highcycle fatigue (HCF) loads. To improve engine reliability, durability and maintenance, it is necessary to understand the interaction of LCF ... -
Stabilizing a 46 MW Multistage Utility Steam Turbine Using Integral Squeeze Film Bearing Support Dampers
(The American Society of Mechanical Engineers (ASME), 2015)A 46 MW 5500 rpm multistage single casing utility steam turbine experienced strong subsynchronous rotordynamic vibration of the first rotor mode; preventing full load operation of the unit. The root cause of the ... -
The Radial Turbine, for Low Specific Speeds and Low Velocity Factors
(The American Society of Mechanical Engineers (ASME), 1961)The main factors which influence radial-turbine performance are discussed. After a short description of the losses in radial turbines, the concept of the diffusion parameter is introduced. It ... -
Developing a Reduced Order Model of Nonsynchronous Vibration in Turbomachinery Using Proper Orthogonal Decomposition Methods
(The American Society of Mechanical Engineers (ASME), 2015)The paper develops a reducedorder model of nonsynchronous vibration (NSV) using proper orthogonal decomposition (POD) methods. The approach was successfully developed and implemented, requiring between two and six POD modes ... -
On the Predicted Performance of Oil Lubricated Thrust Collars in Integrally Geared Compressors
(The American Society of Mechanical Engineers (ASME), 2015)Integrally geared compressors (IGCs) comprise single stage impellers installed on the ends of pinion shafts, all driven by a main bull gear (BG) and shaft system. When compared to single shaft multistage centrifugal ... -
Performance Metrics and Experimental Testing of Erosion Resistant Compressor Blade Coatings
(The American Society of Mechanical Engineers (ASME), 2015)A durability test rig for erosionresistant gas turbine engine compressor blade coatings was designed and commissioned. Bare and coated 174PH steel modified NACA 6505profile blades were spun at an average speed of 10,860 rpm ... -
Second Law Analysis of Integrated Solar Combined Cycle Power Plants
(The American Society of Mechanical Engineers (ASME), 2015)Integrated solar combined cycle (ISCC) is an operationally simple, clean electric power generation system that is economically more attractive visأ vis standalone concentrating solar power (CSP) technology. The ISCC can ... -
A New Experimental Facility to Investigate Combustor–Turbine Interactions in Gas Turbines With Multiple Can Combustors
(The American Society of Mechanical Engineers (ASME), 2015)This paper describes a new modular experimental facility that was purposebuilt to investigate flow interactions between the combustor and first stage nozzle guide vanes (NGVs) of heavy duty power generation gas turbines ...