Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2201-2220 of 9564
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Vortex Shedding and Frequency Lock in on Stand Still Wind Turbines—A Baseline Experiment
(The American Society of Mechanical Engineers (ASME), 2018)During the commissioning and stand-still cycles of wind turbines, the rotor is often stopped or even locked leaving the rotor blades at a standstill. When the blades are at a standstill, angles of attack on the blades can ... -
Characterization of Nonequilibrium Condensation of Supercritical Carbon Dioxide in a de Laval Nozzle
(The American Society of Mechanical Engineers (ASME), 2018)Carbon capture and storage could significantly reduce carbon dioxide (CO2) emissions. One of the major limitations of this technology is the energy penalty for the compression of CO2 to supercritical conditions. To reduce ... -
Experimental Analysis of Angled Injection Aerostatic Hybrid Bearings
(The American Society of Mechanical Engineers (ASME), 2018)Counter-rotation angled injection employed for aerostatic hybrid bearings reduces the cross coupling stiffness that may lead to whirl–whip instabilities at high rotation speeds. The benefits of counter-rotation injection ... -
NOx-Formation and CO-Burnout in Water-Injected, Premixed Natural Gas Flames at Typical Gas Turbine Combustor Residence Times
(The American Society of Mechanical Engineers (ASME), 2018)With the transition of the power production markets toward renewable energy sources, an increased demand for flexible, fossil-based power production systems arises. Steep load gradients and a high range of flexibility make ... -
Large Eddy Simulation of Light-Round in an Annular Combustor With Liquid Spray Injection and Comparison With Experiments
(The American Society of Mechanical Engineers (ASME), 2018)The light-round is defined as the process by which the flame initiated by an ignition spark propagates from burner to burner in an annular combustor, eventually leading to a stable combustion. Combining experiments and ... -
On-Site Identification of Dynamic Annular Seal Forces in Turbo Machinery Using Active Magnetic Bearings: An Experimental Investigation
(The American Society of Mechanical Engineers (ASME), 2018)Significant dynamic forces can be generated by annular seals in rotordynamics and can under certain conditions destabilize the system leading to a machine failure. Mathematical modeling of dynamic seal forces are still ... -
On the Combination of Large Eddy Simulation and Phenomenological Soot Modeling to Calculate the Smoke Index From Aero-Engines Over a Large Range of Operating Conditions
(The American Society of Mechanical Engineers (ASME), 2018)Nowadays, models predicting soot emissions are neither able to describe correctly fine effects of technological changes on sooting trends nor sufficiently validated at relevant operating conditions to match design office ... -
Experimental and Calculation Study of Diesel-Generator Performance in Transient Conditions
(The American Society of Mechanical Engineers (ASME), 2018)To provide pregiven quality ratings of control processes of maximal speed deviation and transient process duration is an important task for diesel generators. Calculation study of methods intended for improving transient ... -
Mixed Acoustic-Entropy Combustion Instabilities in a Model Aeronautical Combustor: Large Eddy Simulation and Reduced Order Modeling
(The American Society of Mechanical Engineers (ASME), 2018)This article focuses on combustion instabilities (CI) driven by entropy fluctuations which is of great importance in practical devices. A simplified geometry is introduced. It keeps the essential features of an aeronautical ... -
Process Control for Compression Systems
(The American Society of Mechanical Engineers (ASME), 2018)This paper discusses the interaction between a centrifugal compressor and the process, and as a result, the control requirements for centrifugal compressor packages. The focus is on variable speed, upstream, and midstream ... -
Multistage Blisk and Large Mistuning Modeling Using Fourier Constraint Modes and PRIME
(The American Society of Mechanical Engineers (ASME), 2018)Current efforts to model multistage turbomachinery systems rely on calculating independent constraint modes for each degree-of-freedom (DOF) on the boundary between stages. While this approach works, it is computationally ... -
A Highly Flexible Approach on the Steady-State Analysis of Innovative Micro Gas Turbine Cycles
(The American Society of Mechanical Engineers (ASME), 2018)Steady-state simulation is an important method to investigate thermodynamic processes. This is especially true for innovative micro gas turbine (MGT)-based cycles as the complexity of such systems grows. Therefore, ... -
Evaluation of Aircraft Engine Gas Path Diagnostic Methods Through ProDiMES
(The American Society of Mechanical Engineers (ASME), 2018)Propulsion diagnostic method evaluation strategy (ProDiMES) offers an aircraft engine diagnostic benchmark problem where the performance of candidate diagnostic methods is evaluated while a fair comparison can be established. ... -
Discussion: “Prediction and Analysis of Impact of Thermal Barrier Coating Oxidation on Gas Turbine Creep Life” (Ogiriki, E. A., Li, Y. G., Nikolaidis, T., 2016, ASME J. Gas Turbine Power, 138(12), p. 121501)
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Dual Drive Booster for a Two-Spool Turbofan: High Shaft Power Offtake Capability for More Electric Aircraft and Hybrid Aircraft Concepts
(The American Society of Mechanical Engineers (ASME), 2018)The effects of high shaft power offtake (POT) in a direct drive, a geared drive, and a novel turbofan configuration are investigated. A design and off-design performance analysis shows the configuration specific limitations ... -
On the Evaluation and Consideration of Fracture Mechanical Notch Support Within a Creep-Fatigue Lifetime Assessment
(The American Society of Mechanical Engineers (ASME), 2018)Changes within the global energy market and a demand for a more flexible operation of gas- and steam-turbines lead to higher utilization of main components and raise the question how to deal with this challenge. One strategy ... -
Optimization of the Charge Motion in Internal Combustion Engines Driven by Sewage Gas for Combined Heat and Power Units
(The American Society of Mechanical Engineers (ASME), 2018)In this study, the influence of the charge motion on the internal combustion in a spark ignition sewage gas-driven engine (150 kW) for combined heat and power (CHP) units was investigated. For this purpose, the geometry ... -
Design of Acoustic Liner in Small Gas Turbine Combustor Using One-Dimensional Impedance Models
(The American Society of Mechanical Engineers (ASME), 2018)The side-wall cooling liner in a gas turbine combustor serves main purposes—heat transfer and emission control. Additionally, it functions as a passive damper to attenuate thermoacoustic instabilities. The perforations in ... -
Plausibility Study of Hecto Pressure Ratio Concepts in Large Civil Aero-Engines
(The American Society of Mechanical Engineers (ASME), 2018)Enabling high overall pressure ratios (OPR), wave rotors, and piston concepts (PCs) seem to be solutions surpassing gas turbine efficiency. Therefore, a comparison of a wave rotor and three PCs relative to a reference gas ... -
Inverted Brayton Cycle With Exhaust Gas Condensation
(The American Society of Mechanical Engineers (ASME), 2018)Approximately 30% of the energy from an internal combustion engine is rejected as heat in the exhaust gases. An inverted Brayton cycle (IBC) is one potential means of recovering some of this energy. When a fuel is burnt, ...