Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3181-3200 of 9564
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Atomization Characteristics of Camelina Based Alternative Aviation Fuels Discharging From Dual Orifice Injector
(The American Society of Mechanical Engineers (ASME), 2015)The atomization characteristics of blends of bioderived camelina hydrogenated renewable jet (HRJ) alternative fuel with conventional aviation kerosene (Jet A1) discharging into ambient atmospheric air from a dualorifice ... -
Near Field Characteristics of a Rectangular Jet and Its Effect on the Liftoff of Turbulent Methane Flame
(The American Society of Mechanical Engineers (ASME), 2015)Understanding the stability of turbulent flames is a key for the design of efficient combustion systems. The present paper reports an experimental study on the effect of the internal geometry of a rectangular orifice on ... -
Robust Indicated Mean Effective Pressure and Combustion Lambda Feedback Control for Lean NOx Trap Regeneration in a 2.2 L Common Rail Direct Injection Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2015)To meet stringent Euro6 emission regulations, a lean NOx trap (LNT) catalyst should be considered to effectively abate NOx emissions. This LNT catalyst should be periodically regenerated without deteriorating driving quality ... -
Amplitude Dependent Flow Field and Flame Response to Axial and Tangential Velocity Fluctuations
(The American Society of Mechanical Engineers (ASME), 2015)The current paper investigates the nonlinear interaction of the flow field and the unsteady heat release rate and the role of swirl fluctuations. The test rig consists of a generic swirlstabilized combustor fed with natural ... -
Optimization of the Efficiency of Stall Control Using Air Injection for Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2015)Numerical investigation of the optimization of the stall control efficiency for a high speed centrifugal compressor using air injection is presented. External air was injected close to the diffuser entrance at the shroud ... -
Optimal Turbulent Schmidt Number for RANS Modeling of Trailing Edge Slot Film Cooling
(The American Society of Mechanical Engineers (ASME), 2015)It has been previously demonstrated that Reynoldsaveraged Navier–Stokes (RANS) simulations do not accurately capture the mixing between the coolant flow and the main flow in trailing edge slot film cooling configurations. ... -
Roles of Organic Emissions in the Formation of Near Field Aircraft Emitted Volatile Particulate Matter: A Kinetic Microphysical Modeling Study
(The American Society of Mechanical Engineers (ASME), 2015)A kinetic microphysical modeling approach that describes the formation of volatile aerosols in the presence of organic emissions in near field aircraft emitted plumes at ground level is presented. Our model suggests that ... -
Unsteady Investigation on Tip Flow Field and Rotating Stall in Counter Rotating Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2015)Contrarotating axial compressor/fan (CRAC) is a promising technology to meet the future goals aircraft industry. Massive time accurate simulations are performed to investigate rotating stall in CRAC containing two ... -
Optical Methods for Studies of Self Excited Oscillations and the Effect of Dampers in a High Pressure Single Sector Combustor
(The American Society of Mechanical Engineers (ASME), 2015)Selfexcited periodic instabilities in a staged lean burn injector could be forced by operating the combustor at offdesign conditions. These pressure oscillations were studied in a high pressure single sector combustor with ... -
Computational Fluid Dynamic Simulation of a Supercritical CO2 Compressor Performance Map
(The American Society of Mechanical Engineers (ASME), 2015)The performance map of a radial compressor operating with supercritical CO2 is computed by means of threedimensional steady state Reynoldsaveraged Navier–Stokes simulations. The geometry investigated is part of a 250 kW ... -
Gas Expanded Lubricant Performance and Effects on Rotor Stability in Turbomachinery
(The American Society of Mechanical Engineers (ASME), 2015)Gasexpanded lubricants (GELs) are tunable mixtures of synthetic oil and carbon dioxide that enable dynamic control of lubricant viscosity during bearing operation. This control can help reduce bearing power loss and operating ... -
An Energy Based Approach to Determine the Fatigue Strength and Ductility Parameters for Life Assessment of Turbine Materials
(The American Society of Mechanical Engineers (ASME), 2015)An energybased framework is developed to determine the fatigue strength parameters of the Basquin equation and the fatigue ductility parameters of the Manson–Coffin equation to predict high cycle fatigue (HCF) and low ... -
Optimal Failure Finding Intervals for Heat Shields in a Gas Turbine Combustion Chamber Using a Multicriteria Approach
(The American Society of Mechanical Engineers (ASME), 2015)When a component, as heat shields, degrade, two stages can be distinguished. First, a potential failure appears, which could evolve to the second stage and become a functional failure. The time between these two stages is ... -
Experimental Identification of Dynamic Force Coefficients for a 110 MM Compliantly Damped Hybrid Gas Bearing
(The American Society of Mechanical Engineers (ASME), 2015)Compliant hybrid gas bearings (HGBs) combine key enabling features from both fixed geometry externally pressurized gas bearings and compliant foil bearings. The compliant hybrid bearing relies on both hydrostatic and ... -
High Precision Control for Magnetically Suspended Rotor of a DGMSCMG Based on Motion Separation
(The American Society of Mechanical Engineers (ASME), 2015)The magnetically suspended rotor (MSR) in a doublegimbal magnetically suspended control moment gyro (DGMSCMG) is a complicated system with multivariable, nonlinearity, and strong coupling. Not only the torsional motion of ... -
Correspondence Between “Stable†Flame Macrostructure and Thermo acoustic Instability in Premixed Swirl Stabilized Turbulent Combustion
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, we conduct an experimental investigation to study the link between the flame macroscale structure—or flame brush spatial distribution—and thermoacoustic instabilities, in a premixed swirlstabilized dump ... -
The Interactions of In Cylinder Flow and Fuel Spray in a Gasoline Direct Injection Engine With Variable Tumble
(The American Society of Mechanical Engineers (ASME), 2015)Particle image velocimetry (PIV) system was used to measure the tumble structure of the incylinder airflow in a fourvalve optical gasoline direct injection (GDI) engine. The tumble ratio was controlled by a flap in the ... -
Effect of Cetane Improver on Combustion and Emission Characteristics of Coal Derived Sasol Isomerized Paraffinic Kerosene in a Single Cylinder Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2015)Sasol isomerized paraffinic kerosene (IPK) is a coalderived synthetic fuel under consideration as a blending stock with JP8 for use in military ground vehicles. Since Sasol IPK is a low ignition quality fuel with derived ... -
Creating Reduced Kinetics Models That Satisfy the Entropy Inequality
(The American Society of Mechanical Engineers (ASME), 2015)In simulating chemically reacting flows, the differential entropy inequality (the local form of the second law of thermodynamics) must be satisfied in addition to the differential mass, momentum, and energy balances. ... -
A Quasi dimensional Model of the Ignition Delay for Combustion Modeling in Spark Ignition Engines
(The American Society of Mechanical Engineers (ASME), 2015)Quasidimensional (QD) modeling of combustion in sparkignition (SI) engines allows to describe the most relevant processes of heat release. Here, a submodel for the ignition delay is introduced and applied. The start of ...