Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3521-3540 of 9564
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Three Dimensional Mass Fraction Distribution of a Spray Measured by X Ray Computed Tomography
(The American Society of Mechanical Engineers (ASME), 2014)In order to design a spraying system with the desired characteristics, the atomization process has to be understood in detail, including the primary breakup of the liquid core. Accurate prediction of primary breakup is a ... -
Hybrid Power Generation Plant for CO2 Capture
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, the issues and challenges of capturing CO2 from a pulverized coal (PC) power plant have been summarized and assessed and a hybrid power generation configuration is developed, which features a gasturbine ... -
Theoretical and Experimental Investigation on Tip Forces and Temperature Distributions of the Brush Seal Coupled Aerodynamic Force
(The American Society of Mechanical Engineers (ASME), 2014)Based on a type of threedimensional slice model of a brush seal combined with the commercial CFD software FLUENT, the study calculated the leakage flow of the brush seal. The aerodynamic forces applied on upstream and ... -
RANS and Large Eddy Simulation of Internal Combustion Engine Flows—A Comparative Study
(The American Society of Mechanical Engineers (ASME), 2014)A comparative cold flow analysis between Reynoldsaveraged Navier–Stokes (RANS) and large eddy simulation (LES) cycleaveraged velocity and turbulence predictions is carried out for a single cylinder engine with a transparent ... -
Flame Dynamics With Hydrogen Addition at Lean Blowout Limits
(The American Society of Mechanical Engineers (ASME), 2014)Lean premixed combustion is widely used in power generation due to low nitric oxide emissions. Recent interest in syngas requires a better understanding of the role of hydrogen addition on the combustion process. In the ... -
Thermodynamic Simulation and Prototype Testing of a Four Stroke Free Piston Engine
(The American Society of Mechanical Engineers (ASME), 2014)In order to achieve higherenergy conversion efficiency, a freepiston engine with an improved fourstroke thermodynamic cycle is investigated in this paper. This cycle is optimized according to the variable strokes feature ... -
Dynamics of a Transversely Excited Swirling, Lifted Flame: Flame Response Modeling and Comparison With Experiments
(The American Society of Mechanical Engineers (ASME), 2014)This paper describes measurements and modeling of the response of a swirling, lifted flame to transverse flow excitation. The problem is motivated by combustion instabilities associated with transverse acoustic modes of ... -
Effects of H2 Addition to Compressed Natural Gas Blends on Cycle to Cycle and Cylinder to Cylinder Combustion Variation in a Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2014)An experimental investigation and a burningrate analysis have been performed on a production 1.4 liter compressed natural gas (CNG) engine fueled with methanehydrogen blends. The engine features a pentroof combustion ... -
Sensitivity of Combustion Driven Structural Dynamics and Damage to Thermo Acoustic Instability: Combustion Acoustics Vibration
(The American Society of Mechanical Engineers (ASME), 2014)The dynamic combustion process generates high amplitude pressure oscillations due to thermoacoustic instabilities, which are excited within the gas turbine. The combustion instabilities have a significant destructive impact ... -
Using Hydrogen as Gas Turbine Fuel: Premixed Versus Diffusive Flame Combustors
(The American Society of Mechanical Engineers (ASME), 2014)This work aims at estimating the efficiency gain resulting from using lean premixed combustors in hydrogenfired combined cycles with respect to diffusive flame combustors with significant inert dilution to limit NOx ... -
The Influence of Inlet Asymmetry on Steam Turbine Exhaust Hood Flows
(The American Society of Mechanical Engineers (ASME), 2014)It has been widely recognized for some decades that it is essential to accurately represent the strong coupling between the last stage blades (LSB) and the diffuser inlet, in order to correctly capture the flow through the ... -
A Critical Review of Passive Noise Control Techniques in Industrial Fans
(The American Society of Mechanical Engineers (ASME), 2014)This review aims to assist engineers in understanding and applying passive solutions for reducing industrial fan noise. The paper systematically reviews the extant literature on passive noise techniques, with a particular ... -
Gas Turbine Engine Health Management: Past, Present, and Future Trends
(The American Society of Mechanical Engineers (ASME), 2014)Engine diagnostic practices are as old as the gas turbine itself. Monitoring and analysis methods have progressed in sophistication over the past six decades as the gas turbine evolved in form and complexity. While much ... -
Structural Stiffness and Damping Coefficients of a Multileaf Foil Bearing With Bump Foils Underneath
(The American Society of Mechanical Engineers (ASME), 2014)This paper presents a multileaf foil bearing (MLFB), which consists of four resilient top foils and four stiff bump foils underneath; thus, a high supporting capacity and a high damping capacity can be achieved. A specially ... -
Squealer Tip Leakage Flow Characteristics in Transonic Condition
(The American Society of Mechanical Engineers (ASME), 2014)The overtipleakage (OTL) flow characteristics for a typical squealer tip of a highpressure turbine blade, which consists of subsonic and transonic flow, have been numerically investigated in the present study, in comparison ... -
Lateral Vibration Attenuation of Shafts Supported by Tilting Pad Journal Bearing With Embedded Electromagnetic Actuators
(The American Society of Mechanical Engineers (ASME), 2014)Hydrodynamic tiltingpad bearings with electromagnetic actuators are designed to take advantage of the loadcarrying capacity of the hydrodynamic bearing together with the actuation capacity of the electromagnets. Hence, ... -
Comments on a Newly Identified Destabilizing Rotordynamic Mechanism Arising in Vertical Hydraulic Turbines and the Back Shrouds of Centrifugal Impellers
(The American Society of Mechanical Engineers (ASME), 2014)In three 2010 papers, Tsujimoto et al. (2010, “Moment Whirl Due to Leakage Flow in the Back Shroud Clearance of a Rotor,†Int. J. Fluid Mach. Syst., 3(3), pp. 235–244), Song et al. (2010, “Rotordynamic Instability ... -
Windage Measurements in a Rotor Stator System With Superimposed Cooling and Rotor Mounted Protrusions
(The American Society of Mechanical Engineers (ASME), 2014)This paper has experimentally studied the windage torque in a rotorstator system with superimposed central inflow and rotormounted protrusions. A novel measurement method has been proposed, and the basic principle is to ... -
An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments
(The American Society of Mechanical Engineers (ASME), 2014)Though many approaches have been proposed in the literature to model the reaction forces in a catcher bearing (CB), there are still phenomena observed in experimental tests that cannot be explained by existing models. The ... -
Experimental Validation of Fretting Fatigue Strength and Fretting Wear Rate at Contact Surface of Turbine Blade Shroud Cover
(The American Society of Mechanical Engineers (ASME), 2014)In continuously coupled blade structures, fretting fatigue and wear have to be considered as supposed failure modes at the contact surface of the shroud cover, which is subject to steady contact pressure from centrifugal ...