Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2461-2480 of 9564
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Detailed Study on Stiffness and Load Characteristics of Film-Riding Groove Types Using Design of Experiments
(The American Society of Mechanical Engineers (ASME), 2017)In the application of film-riding sealing technology, there are various groove features that can be used to induce hydrodynamic lift. However, there is little guidance in selecting the relative parameter settings in order ... -
An Experimental Apparatus and Procedure for the Simulation of Thermal Stresses in Gas Turbine Combustion Chamber Panels Made of Ceramic Matrix Composites
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents an experimental procedure developed to simulate the behavior of ceramic matrix composites (CMCs) under the cyclic thermal stresses of a gas turbine combustion chamber. An experimental apparatus was ... -
A Weakly Nonlinear Approach Based on a Distributed Flame Describing Function to Study the Combustion Dynamics of a Full-Scale Lean-Premixed Swirled Burner
(The American Society of Mechanical Engineers (ASME), 2017)Modern combustion chambers of gas turbines for power generation and aero-engines suffer of thermo-acoustic combustion instabilities generated by the coupling of heat release rate fluctuations with pressure oscillations. ... -
Unsteady Flow Field and Coarse Droplet Measurements in the Last Stage of a Low-Pressure Steam Turbine With Supersonic Airfoils Near the Blade Tip
(The American Society of Mechanical Engineers (ASME), 2017)The largest share of electricity production worldwide belongs to steam turbines. However, the increase of renewable energy production has led steam turbines to operate under part load conditions and increase in size. As a ... -
The Twisted-Blade Model for Radial-Turbine Mistuning
(The American Society of Mechanical Engineers (ASME), 2017)One of the common failure modes of the diesel-engine turbochargers is the high-cycle fatigue (HCF) of the turbine-wheel blades. Mistuning of the blades due to the casting process is believed to contribute to this failure ... -
Prediction of Flame Burning Velocity at Early Flame Development Time With High Exhaust Gas Recirculation and Spark Advance
(The American Society of Mechanical Engineers (ASME), 2017)Diluting spark-ignited (SI) stoichiometric combustion engines with excess residual gas improves thermal efficiency and allows the spark to be advanced toward maximum brake torque (MBT) timing. However, flame propagation ... -
Off-Design Performance of an Interstage Turbine Burner Turbofan Engine
(The American Society of Mechanical Engineers (ASME), 2017)This paper focuses on the off-design performance of a turbofan engine with an interstage turbine burner (ITB). The ITB is an additional combustion chamber located between the high-pressure turbine (HPT) and the low-pressure ... -
Two-Dimensional Supersonic Thrust Vectoring Using Staggered Ramps
(The American Society of Mechanical Engineers (ASME), 2017)The thrust vectoring performance of a novel nozzle mechanism was numerically investigated. The nozzle was designed for supersonic, air-breathing engines using published engine data, isentropic relationships, and piecewise ... -
Operability Limits of Tubular Injectors With Vortex Generators for a Hydrogen-Fueled Recuperated 100 kW Class Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2017)Vortex generators are known to be effective in augmenting the mixing of fuel jets with air. The configuration investigated in this study is a tubular air passage with fuel injection from one single orifice placed in the ... -
Combustion Characteristics of Methane Direct Injection Engine Under Various Injection Timings and Injection Pressures
(The American Society of Mechanical Engineers (ASME), 2017)The performance of a methane direct injection engine was investigated under various fuel injection timings and injection pressures. A single-cylinder optical engine was used to acquire in-cylinder pressure data and flame ... -
Erratum: “Design and Performance Prediction of Hybrid Air Foil Thrust Bearings” [ASME J. Eng. Gas Turbines Power, 2010, 133(4), p. 042501; DOI: 10.1115/1.4002249]
(The American Society of Mechanical Engineers (ASME), 2017) -
The Impact of Reciprocating Compressor Pulsations on the Surge Margin of Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2017)Pressure pulsations into a centrifugal compressor can move its operating point into surge. This is concerning in pipeline stations where centrifugal compressors operate in series/parallel with reciprocating compressors. ... -
Method for the Preliminary Fluid Dynamic Design of High-Temperature Mini-Organic Rankine Cycle Turbines
(The American Society of Mechanical Engineers (ASME), 2017)Widespread adoption of renewable energy technologies will arguably benefit from the availability of economically viable distributed thermal power conversion systems. For this reason, considerable efforts have been dedicated ... -
Flow Dynamics and Mixing of a Transverse Jet in Crossflow—Part II: Oscillating Crossflow
(The American Society of Mechanical Engineers (ASME), 2017)The present work extends Part I of our study to investigate the flow dynamics and scalar mixing of a turbulent gaseous jet in an oscillating crossflow. Attention is first given to intrinsic flow instabilities under a steady ... -
Integrated Three-Dimensional Thermohydrodynamic Analysis of Turbocharger Rotor and Semifloating Ring Bearings
(The American Society of Mechanical Engineers (ASME), 2017)The mechanical performances of turbocharger rotor bearings system are strongly coupled with the thermal effects of lubrication. This paper built an integrated three-dimensional thermohydrodynamic model for the rotor and ... -
Modeling and Simulation of an Inverted Brayton Cycle as an Exhaust-Gas Heat-Recovery System
(The American Society of Mechanical Engineers (ASME), 2017)The exhaust gas from an internal combustion engine contains approximately 30% of the thermal energy of combustion. The exhaust-gas heat-recovery systems aim to reclaim a proportion of this energy in a bottoming thermodynamic ... -
Chemical Kinetic Mechanism Study on Premixed Combustion of Ammonia/Hydrogen Fuels for Gas Turbine Use
(The American Society of Mechanical Engineers (ASME), 2017)To explore the potential of ammonia-based fuel as an alternative fuel for future power generation, studies involving robust mathematical, chemical, thermofluidic analyses are required to progress toward industrial ... -
Flow Dynamics and Mixing of a Transverse Jet in Crossflow—Part I: Steady Crossflow
(The American Society of Mechanical Engineers (ASME), 2017)A large-eddy-simulation-based numerical investigation of a turbulent gaseous jet in crossflow (JICF) is presented. The present work focuses on cases with a steady crossflow and two different jet-to-crossflow velocity ratios, ... -
Torsional Robustness of the Combined Cycle Power Train Arrangement: Application of Statistical Methods to Accelerate Shaft-Line Design Cycles
(The American Society of Mechanical Engineers (ASME), 2017)This article presents the application of statistical methods to guide the rotordynamic design of a turbogenerator shaft-line. One of the basic requirements is all shaft components must survive the event of a short circuit ... -
Development of Advanced Thermal Barrier Coatings With Improved Temperature Capability
(The American Society of Mechanical Engineers (ASME), 2017)Continuously increasing hot gas temperatures in heavy duty gas turbines lead to increased thermal loadings of the hot gas path materials. Thermal barrier coatings (TBCs) are used to reduce the superalloys temperature and ...