Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1761-1780 of 9564
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Static and Dynamic Coefficient Measurements for a Thrust Collar Used in an Integrally Geared Compressor
(American Society of Mechanical Engineers (ASME), 2019)This paper introduces a test facility specifically designed to measure the axial stiffness and damping coefficients of an oil-lubricated thrust collar (TC). The geometry, load, and speeds of the test facility are representative ... -
Cycle-to-Cycle NO and NOx Emissions From a HSDI Diesel Engine
(American Society of Mechanical Engineers (ASME), 2019)Engine-out NOx emissions from diesel engines continue to be a major topic of research interest. While substantial understanding has been obtained of engine-out (i.e., before any aftertreatment) NOx formation and reduction ... -
Analysis of Counter-Rotating Roller Bearing in Different Mounting Configurations
(American Society of Mechanical Engineers (ASME), 2019)Advanced engine configuration studies have shown large advantages for an engine with counter-rotating spools with intershaft counter-rotating roller bearings. Mounted on two counter-rotating differential-speed hollow rotors, ... -
Numerical Simulation of Re-Entrant Bowl Effects on Natural-Gas Spark-Ignition Operation
(American Society of Mechanical Engineers (ASME), 2019)Heavy-duty compression–ignition (CI) engines converted to natural gas (NG) spark ignition (SI) operation have the potential to increase the use of NG in the transportation sector. A three-dimensional (3D) numerical simulation ... -
Experimental Investigation of Heat Transfer in Cavities of Steam Turbine Casings Under Generic Test Rig Conditions
(American Society of Mechanical Engineers (ASME), 2019)This paper presents the first experimental results of the systematic investigation of forced convection heat transfer in scaled generic models of steam turbine casing side spaces with varied geometric dimensions under fully ... -
Numerical and Experimental Research on the Fluid-Induced Forces of Clearance Flow in Canned Motor Reactor Coolant Pump
(American Society of Mechanical Engineers (ASME), 2019)Reactor coolant pump (RCP) is one of the most important equipment of the coolant loop in a pressurized water reactor system. Its safety relies on the characteristics of the rotordynamic system. For a canned motor RCP, the ... -
Experimental and Analytical Characterization of Alternative Aviation Fuel Sprays Under Realistic Operating Conditions
(American Society of Mechanical Engineers (ASME), 2019)The National Jet Fuel Combustion Program (NJFCP) is an initiative being led by the Office of Environment & Energy at the FAA, to streamline the ASTM jet fuels certification process for alternative aviation fuels. To ... -
Experimental Investigation of Fuel Anti-Knock-Index Requirements in Three Small Two-Stroke Engines for Remotely Piloted Aircraft
(American Society of Mechanical Engineers (ASME), 2019)Small remotely piloted aircraft (10–25 kg) that are powered by internal combustion engines typically operate on gasoline with an anti-knock index (AKI) > 80. To comply with the single-battlefield-fuel initiative [Department ... -
Nitrogen Oxides Reduction Effect and the Influence Mechanism of Exhaust Valve Lift on a Two-Stroke Marine Diesel Engine
(American Society of Mechanical Engineers (ASME), 2019)For the two-stroke marine diesel engine, the action of exhaust valve has a significant impact on scavenging and combustion processes and ultimately affects the engine performances and emissions. In order to reduce nitrogen ... -
Multicomponent Evaporation Characteristics of Biodiesel Sprays
(American Society of Mechanical Engineers (ASME), 2019)The vapor mass fraction distribution of the multicomponent surrogate of diesel and biodiesel fuel is studied using multicomponent evaporation model at engine-relevant conditions. The numerical model is validated with ... -
Simulation of a Combined Nozzled and Nozzleless Twin-Entry Turbine for Improved Efficiency
(American Society of Mechanical Engineers (ASME), 2019)This paper discusses the performance and the mass flow characteristics of a twin-entry turbocharger turbine with a fixed nozzle entry and a nozzleless entry for the automotive application. Because the configuration, which ... -
Modeling Multiphase Effects in CO2 Compressors at Subcritical Inlet Conditions
(American Society of Mechanical Engineers (ASME), 2019)An advanced numerical framework to model CO2 compressors over a wide range of subcritical conditions is presented in this paper. Thermodynamic and transport properties are obtained through a table look-up procedure with ... -
Assessment of Deterministic Shape Optimizations Within a Stochastic Framework for Supersonic Organic Rankine Cycle Nozzle Cascades
(American Society of Mechanical Engineers (ASME), 2019)The design of converging–diverging blades for organic Rankine cycle (ORC) applications widely relies on automated shape-optimization processes. As a result, the optimization produces an adapted-nozzle cascade at the design ... -
Parametric Reduced Order Models for Bladed Disks With Mistuning and Varying Operational Speed
(American Society of Mechanical Engineers (ASME), 2019)A considerable amount of research has been conducted to develop reduced order models (ROMs) of bladed disks that can be constructed using single sector calculations when there is mistuning present. A variety of methods ... -
Three-Dimensional/One-Dimensional Combined Simulation of Deep Surge Loop in a Turbocharger Compressor With Vaned Diffuser
(American Society of Mechanical Engineers (ASME), 2019)High accuracy simulation of compressor surge origin and growth is an important challenge for designers of systems using compressors likely to develop that severe instability. Indeed, understanding its driving phenomena, ... -
Assessing Combustion Performance of a Diesel Reciprocating Engine Under Various Fuel Blends Using a Calculus-Statistical Time-Series Vibration Based Approach
(American Society of Mechanical Engineers (ASME), 2019)The increasing use of biofuels in recent years has resulted in renewed consideration of compression ignition (CI) engines for power generation. However, the differences in chemical properties of these fuels have led to ... -
Trajectory of a Liquid Jet in a High Temperature and Pressure Gaseous Cross Flow
(American Society of Mechanical Engineers (ASME), 2019)An experimental study of liquid jet injection into subsonic air crossflow is presented. The aim of this study was to relate the jet trajectory to flow parameters, including jet and air velocities, pressure and temperature, ... -
Observations on the Role of Auto-Ignition in Flame Stabilization in Turbulent Non-Premixed Jet Flames in Vitiated Coflow
(American Society of Mechanical Engineers (ASME), 2019)Turbulent combustion of non-premixed jets issuing into a vitiated coflow is studied at coflow temperatures that do not significantly exceed the fuel auto-ignition temperatures, with the objective of observing the global ... -
Experimental Investigation on the Influence of Geometrical Parameters on the Frictional Heat Input and Leakage Performance of Brush Seals
(American Society of Mechanical Engineers (ASME), 2019)Because of the superior sealing characteristics compared to labyrinth seals, brush seals found an increased spread in turbomachinery in recent years. Their outstanding sealing performance results mainly from their flexibility. ... -
Time-Volume Estimation of Velocity Fields From Nonsynchronous Planar Measurements Using Linear Stochastic Estimation
(American Society of Mechanical Engineers (ASME), 2019)The work presented in this paper combines multiple nonsynchronous planar measurements to reconstruct an estimate of a synchronous, instantaneous flow field of the whole measurement set. Temporal information is retained ...