Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1581-1600 of 9564
-
Numerical Comparison of Leakage Flow and Rotordynamic Characteristics for Two Types of Labyrinth Seals With Baffles
(The American Society of Mechanical Engineers (ASME), 2020)Cavity separation baffles can decrease the circumferential swirl intensity of labyrinth seals and increase the seals' rotordynamic characteristics. Compared with conventional baffles, the bristle packs of brush seal baffles ... -
Spectral Microscopy Imaging System for High-Resolution and High-Speed Imaging of Fuel Sprays
(The American Society of Mechanical Engineers (ASME), 2020)Modern high-efficiency engines utilize direct injection for charge preparation at extremely high pressures. At these conditions, the scales of atomization become challenging to measure, as primary breakup occurs on the ... -
Investigation of Gasoline Compression Ignition for Combustion Control
(The American Society of Mechanical Engineers (ASME), 2020)Future emission regulations for internal combustion engines require increasingly stringent reductions of engine-out emissions, especially NOx and particulate matter (PM), together with the continuous improvement of engine ... -
Optimal Control and Energy Management for Hybrid Gas-Electric Propulsion
(The American Society of Mechanical Engineers (ASME), 2020)The paper considers a generic model for a turbofan engine coupled to electromechanical (EM) elements used for energy conversion and storage in electric form. The electromechanical systems apply torque to the engine shafts, ... -
Spray Flame Characteristics of Bio-Derived Fuels in a Simulated Gas Turbine Burner
(The American Society of Mechanical Engineers (ASME), 2020)Fuel injection plays an important role in liquid-fueled gas turbine combustion. The strong interdependence of liquid breakup and atomization, turbulent dispersion of these droplets, droplet evaporation, and fuel–air mixing ... -
Amplification of Operational Uncertainty Induced by Nonideal Flows in Supersonic Turbine Cascades
(The American Society of Mechanical Engineers (ASME), 2020)In high-temperature transcritical organic Rankine cycles (ORCs), the expansion process may take place in the neighborhood of the thermodynamic critical point. In this region, many organic fluids feature a value of the ... -
Model-Based Design and Optimization for Large Bore Engines: Some Industrial Case Studies
(The American Society of Mechanical Engineers (ASME), 2020)Large bore reciprocating internal combustion (IC) engines are used in a wide variety of applications such as power generation, transportation, gas compression, mechanical drives, and mining. Each application has its own ... -
Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions
(The American Society of Mechanical Engineers (ASME), 2020)The labyrinth seal is one of the most popular noncontact annular seals used in centrifugal compressors to improve machine efficiency by reducing the secondary flow leakage. Reducing the radial clearance Cr can effectively ... -
Microstructure and Oxidation Behavior of Narrow Gap Brazing and Wide Gap Brazing Joints With Boron/Silicon-Free Nickel Base Braze Alloys
(The American Society of Mechanical Engineers (ASME), 2020)In this study, the microstructure and solidus and liquidus of several Ni-Co-Hf-Zr-Ti-Al braze alloys were first examined with the objective to develop a B- and Si-free low-melting braze alloy for narrow gap (NGB) and wide ... -
Impact of the Precessing Vortex Core on NOx Emissions in Premixed Swirl-Stabilized Flames—An Experimental Study
(The American Society of Mechanical Engineers (ASME), 2020)The reduction of NOx emissions remains a driving factor in the design process of swirl-stabilized combustion systems, to meet legislative restrictions. In reacting swirl flows, hydrodynamic coherent structures, such as ... -
Multi-Objective Modeling of Leading-Edge Serrations Applied to Low-Pressure Axial Fans
(The American Society of Mechanical Engineers (ASME), 2020)A novel modeling strategy is proposed which allows high-accuracy predictions of aerodynamic and aeroacoustic target values for a low-pressure axial fan, equipped with serrated leading edges. Inspired by machine learning ... -
A Marine Turbocharger Retrofitting Platform
(The American Society of Mechanical Engineers (ASME), 2020)A turbocharger retrofitting platform utilizing one-dimensional (1D) models for calculating turbomachinery components map and a fully coupled process for integration with the turbomachinery components and the diesel engine, ... -
Analysis of Friction-Saturated Flutter Vibrations With a Fully Coupled Frequency Domain Method
(The American Society of Mechanical Engineers (ASME), 2020)Flutter stability is a dominant design constraint of modern turbines. Thus, flutter-tolerant designs are currently explored, where the resulting vibrations remain within acceptable bounds. In particular, friction damping ... -
Numerical Investigation on the Aerodynamic Performance of a Low-Pressure Steam Turbine Exhaust Hood Using Design of Experiment Analysis
(The American Society of Mechanical Engineers (ASME), 2020)Nowadays, the rising interest in using renewable energy for thermal power generation has led to radical changes in steam turbine design practice and operability. Modern steam turbines are required to operate with greater ... -
Numerical Modeling of the Effects of Leading-Edge Erosion and Trailing-Edge Damage on Wind Turbine Loads and Performance
(The American Society of Mechanical Engineers (ASME), 2020)Wind turbines operate in challenging environmental conditions. In hot and dusty climates, blades are constantly exposed to abrasive particles that, according to many field reports, cause significant damages to the leading ... -
Experiments With a Rotor-Hybrid Gas Bearing System Undergoing Maneuver Loads From Its Base Support
(The American Society of Mechanical Engineers (ASME), 2020)Gas bearings enable microturbomachinery (MTM) with a large power to weight ratio, low part count, and nearly frictionless motion, thus resulting in systems operating over extended maintenance intervals and with improved ... -
Pumping Loss of Shrouded Meshed Spur Gears
(The American Society of Mechanical Engineers (ASME), 2020)High speed rotorcraft transmissions are subject to load-independent power losses consisting of drag loss and pumping loss. Tightly conforming shrouds enclosing the transmission gears are often incorporated to reduce the ... -
Computational Cost Reduction of MIMO Controllers for Active Magnetic Bearing Systems
(The American Society of Mechanical Engineers (ASME), 2020)Generalized multiple-input-multiple-output (MIMO) controllers such as H∞ and μ have not been widely adopted in the magnetic bearing industry, partially due to high computational cost relative to simpler single-input-single-output ... -
An Optimized Correlation for Turbulent Flame Speed for C1–C3 Fuels at Engine-Relevant Conditions
(The American Society of Mechanical Engineers (ASME), 2020)The aim of this work is to examine the state-of-the-art turbulent flame speed (ST) correlations and optimize their adjustable parameters to best match a wide range experimental turbulent premixed combustion results. Based ... -
Discussion of “Non-Axisymmetric Flows and Rotordynamic Forces in an Eccentric Shrouded Centrifugal Compressor—Part 2: Analysis” (Song, J., and Song S. J., ASME J. Eng. Gas Turbines Power, 141(11), p. 111015)
(The American Society of Mechanical Engineers (ASME), 2020)By comparisons to measurements, the bulk-flow model for flow in the impeller annulus appears to work well. Baskharone and Hensel [1] presented CFD predictions for flow in the leakage annulus of a pump impeller based on a ...