Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2841-2860 of 9564
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A Model for Predicting the Lift Off Height of Premixed Jets in Vitiated Cross Flow
(The American Society of Mechanical Engineers (ASME), 2016)Lean premixed singlestage combustion is state of the art for low pollution combustion in heavyduty gas turbines with gaseous fuels. The application of premixed jets in multistage combustion to lower nitric oxide emissions ... -
Design of Experiments to Investigate Geometric Effects on Fluid Leakage Rate in a Balance Drum Seal
(The American Society of Mechanical Engineers (ASME), 2016)Grove configuration has a direct influence on the performance of the labyrinth seal. In this study, the geometry of the groove cavities in a water balance drum labyrinth seal was varied to investigate the effects on fluid ... -
Model Based Analysis of Friction Induced Subsynchronous Whirl for a Rotor Contacting With Clearance Bearings Under Axial Load
(The American Society of Mechanical Engineers (ASME), 2016)For rotors supported by active magnetic bearings (AMBs), clearance bearings are commonly used to provide backup support under loss of AMB functionality. Test data from real machines shows that vibration during touchdown ... -
The Effect of In Cylinder Turbulence on Lean, Premixed, Spark Ignited Engine Performance
(The American Society of Mechanical Engineers (ASME), 2016)The intensity and structure of incylinder turbulence is known to have a significant effect on internal combustion engine performance. Changes in flow structure and turbulence intensity result in changes to the rate of heat ... -
A Survey of Analysis, Modeling, and Diagnostics of Diesel Fuel Injection Systems
(The American Society of Mechanical Engineers (ASME), 2016)Diesel engines are widely used due to their high reliability, high thermal efficiency, fuel availability, and low consumption. They are used to generate power, e.g., in passenger cars, ships, power plants, marine offshore ... -
Physical Analysis of Rotor to Stator Rub in a Large Capacity Low Pressure Steam Turbogenerator
(The American Society of Mechanical Engineers (ASME), 2016)Excessive vibration in largecapacity turbine generators can lead to expensive repairs and downtime with associated loss of operational income. Therefore, it is vital to detect the rubbing location in the rotor system at ... -
A Low Order Model for Predicting Turbocharger Turbine Unsteady Performance
(The American Society of Mechanical Engineers (ASME), 2016)In this paper, a loworder model for predicting performance of radial turbocharger turbines is presented. The model combines an unsteady quasithreedimensional (Q3D) computational fluid dynamics (CFD) method with multiple ... -
Effect of Valve Opening/Closing Setup on Computational Fluid Dynamics Prediction of Engine Flows
(The American Society of Mechanical Engineers (ASME), 2016)In computational fluid dynamics (CFD) simulations of internal combustion engines, one of the critical modeling parameters is the valve setup. A standard workaround is to keep the valve opens at a certain clearance (minimum ... -
Sensor Selection for Aircraft Engine Performance Estimation and Gas Path Fault Diagnostics
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents analytical techniques for aiding system designers in making aircraft engine health management sensor selection decisions. The presented techniques, which are based on linear estimation and probability ... -
Prediction of Sand Transport and Deposition in a Two Pass Internal Cooling Duct
(The American Society of Mechanical Engineers (ASME), 2016)Sand transport and deposition is investigated in a twopass internal cooling ribbed geometry at near engine conditions. Largeeddy simulation (LES) calculations are performed for bulk Reynolds number of 25,000 to calculate ... -
Efficient Computation of Thermoacoustic Modes in Industrial Annular Combustion Chambers Based on Bloch Wave Theory
(The American Society of Mechanical Engineers (ASME), 2016)Most annular combustors feature a discrete rotational symmetry so that the full configuration can be obtained by copying one burnerflame segment a certain number of times around the circumference. A thermoacoustic model ... -
Influences of Design Parameters on a Double Serpentine Convergent Nozzle
(The American Society of Mechanical Engineers (ASME), 2016)Serpentine nozzles are supplied in stealth bombers and unmanned aerial vehicles (UAVs) to evidently suppress the infrared radiation signatures (IRSs) emitted by engine exhausts. It is commonly known that excessive geometric ... -
Model Predictive Control of Offshore Power Stations With Waste Heat Recovery
(The American Society of Mechanical Engineers (ASME), 2016)The implementation of waste heat recovery units on oil and gas offshore platforms demands advances in both design methods and control systems. Modelbased control algorithms can play an important role in the operation of ... -
The Impact of Pad Flexibility on the Rotordynamic Coefficients of Tilting Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2016)Static and dynamic load tests were performed on a threepad, rockerpivot, tiltingpad journal bearing (TPJB) with three interchangeable pad configurations, each with measurably different pad flexibilities. Measured ... -
Experimental and Numerical Investigation of the Flow in a Low Pressure Industrial Steam Turbine With Part Span Connectors
(The American Society of Mechanical Engineers (ASME), 2016)An experimental and numerical study on the flow in a threestage lowpressure (LP) industrial steam turbine is presented and analyzed. The investigated LP section features conical friction bolts in the last and a lacing wire ... -
Fundamental Combustion Characteristics of Lean and Stoichiometric Hydrogen Laminar Premixed Flames Diluted With Nitrogen or Carbon Dioxide
(The American Society of Mechanical Engineers (ASME), 2016)In this work, the laminar combustion characteristics of H2/N2/air (H2/CO2/air) were systematically investigated under different hydrogen ratios (40–100%) and equivalence ratios (0.4–1.0) in a closed combustion vessel ... -
Multidisciplinary Assessment of the Control of the Propellers of a Pusher Geared Open Rotor—Part I: Zero Dimensional Performance Model for Counter Rotating Propellers
(The American Society of Mechanical Engineers (ASME), 2016)Due to their high propulsive efficiency, counterrotating open rotors (CRORs) have the potential to significantly reduce fuel consumption and emissions relative to conventional high bypass ratio turbofans. However, this ... -
Multidisciplinary Assessment of the Control of the Propellers of a Pusher Geared Open Rotor—Part II: Impact on Fuel Consumption, Engine Weight, Certification Noise, and NOx Emissions
(The American Society of Mechanical Engineers (ASME), 2016)Due to their high propulsive efficiency, counterrotating open rotors (CRORs) have the potential to significantly reduce fuel consumption and emissions relative to conventional high bypass ratio turbofans. However, this ... -
A Mechanism Based Approach From Low Cycle Fatigue to Thermomechanical Fatigue Life Prediction
(The American Society of Mechanical Engineers (ASME), 2016)Deformation and damage accumulation occur by fundamental dislocation and diffusion mechanisms. An integrated creep–fatigue theory (ICFT) has been developed, based on the physical strain decomposition rule that recognizes ... -
Rotordynamic Performance of a Negative Swirl Brake for a Tooth on Stator Labyrinth Seal
(The American Society of Mechanical Engineers (ASME), 2016)In the late 1970s, Benckert and Wachter (Technical University Stuttgart) tested labyrinth seals using air as the test media and measured direct and crosscoupled stiffness coefficients. They reported the following results: ...