Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2441-2460 of 9564
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Application of Computational Fluid Dynamics Simulation to Squeeze Film Damper Analysis
(The American Society of Mechanical Engineers (ASME), 2017)Squeeze film dampers (SFDs) are used in high-speed turbomachinery to provide external damping to the system. Computational fluid dynamics (CFD) simulation is a highly effective tool to predict the performance of SFDs and ... -
Design for Additive Manufacturing: Internal Channel Optimization
(The American Society of Mechanical Engineers (ASME), 2017)The new possibilities offered by additive manufacturing (AM) can be exploited in gas turbines to produce a new generation of complex and efficient internal coolant systems. The flexibility offered by this new manufacturing ... -
Characterization of Laser Additive Manufacturing-Fabricated Porous Superalloys for Turbine Components
(The American Society of Mechanical Engineers (ASME), 2017)The limits of gas turbine technology are heavily influenced by materials and manufacturing capabilities. Lately, incremental performance gains responsible for increasing the allowable turbine inlet temperature (TIT) have ... -
Potential of Future Thermoelectric Energy Recuperation for Aviation
(The American Society of Mechanical Engineers (ASME), 2017)Germany's Fifth Aeronautical Research Program (LuFo-V) gives the framework for the thermoelectric energy recuperation for aviation (TERA) project, which focuses on the positioning of thermoelectricity by means of a holistic ... -
Effects of Amorphous Ti–Al–B Nanopowder Additives on Combustion in a Single-Cylinder Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2017)Energetic nanoparticles are promising fuel additives due to their high specific surface area, high energy content, and catalytic capability. Novel amorphous reactive mixed-metal nanopowders (RMNPs) containing Ti, Al, and ... -
Effects of Opening and Closing Fuel-Injector Valve on Air/Fuel Mixture
(The American Society of Mechanical Engineers (ASME), 2017)Lower engine emissions like CO2, particulate matter (PM), and NOx have recently become more necessary in automobile engines to protect the earth's environment. Keeping uniformity of air/fuel mixture and decreasing fuel ... -
Numerical Studies of Glow Plug Shield on Natural Gas Ignition Characteristics in a Compression-Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents a numerical study on fuel injection, ignition, and combustion in a direct-injection natural gas (DING) engine with ignition assisted by a shielded glow plug (GP). The shield geometry is investigated by ... -
An Improved Rate of Heat Release Model for Modern High-Speed Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2017)To meet the increasingly stringent emissions standards, diesel engines need to include more active technologies with their associated control systems. Hardware-in-the-loop (HiL) approaches are becoming popular where the ... -
Thermodynamic Considerations Regarding the Use of Exhaust Gas Recirculation for Conventional and High Efficiency Engines
(The American Society of Mechanical Engineers (ASME), 2017)During the last several decades, investigations of the operation of internal combustion engines utilizing exhaust gas recirculation (EGR) have increased. This increased interest has been driven by the advantages of the use ... -
High-Altitude Matching Characteristic of Regulated Two-Stage Turbocharger With Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2017)To improve engine power at high altitude, the regulated two-stage turbocharger (RTST) which was applied to different altitudes was developed by the authors. The working process model of heavy-duty common-rail diesel engine ... -
Numerical Prediction of the Sources and the Modal Content of the Acoustic Field in a Radial Compressor Outflow
(The American Society of Mechanical Engineers (ASME), 2017)In large modern turbochargers, transonic compressors often constitute the main source of noise, with a frequency spectrum typically dominated by tonal noise at the blade passing frequency (BPF) and its harmonics. Inflow ... -
Formulation of Sasol Isomerized Paraffinic Kerosene Surrogate Fuel for Diesel Engine Application Using an Ignition Quality Tester
(The American Society of Mechanical Engineers (ASME), 2017)Sasol isomerized paraffinic kerosene (IPK) is a coal-derived synthetic fuel under consideration as a blending stock with jet propellant 8 (JP-8) for use in military equipment. However, Sasol IPK is a low ignition quality ... -
Solution Stabilization and Convergence Acceleration for the Harmonic Balance Equation System
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents an efficient approach for stabilizing solution and accelerating convergence of a harmonic balance equation system for an efficient analysis of turbomachinery unsteady flows due to flutter and blade row ... -
Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil Via Electric Motor Driving Tests and One Degree-of-Freedom Shaker Dynamic Loading Tests
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents comprehensive test measurements for gas journal bearings with damping structures of a bump foil layer and/or a polymer layer. A one-pad top foil forms the bearing surface, under which the bearing structure ... -
Unsteady Heat Transfer and Pressure Measurements on the Airfoils of a Rotating Transonic Turbine With Multiple Cooling Configurations
(The American Society of Mechanical Engineers (ASME), 2017)Measurements are presented for a high-pressure transonic turbine stage operating at design-corrected conditions with forward and aft purge flow and blade film cooling in a short-duration blowdown facility. Four different ... -
Experimental and Numerical Investigation of Annular Casing Impingement Arrays for Faster Casing Response
(The American Society of Mechanical Engineers (ASME), 2017)The transient heat transfer facility (THTF) was developed to test full-scale high pressure compressor and turbine casing air systems using gas turbine engine representative secondary air system conditions. Transient casing ... -
A Damage Evaluation Model of Turbine Blade for Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2017)Current maintenance, having a great impact on the safety, reliability and economics of a gas turbine, becomes the major obstacle for the application of gas turbines in energy field. An effective solution is to process ... -
A Reduced Order Modeling Methodology for Steam Turbine Clearance Control Design
(The American Society of Mechanical Engineers (ASME), 2017)Finite element models (FEMs) are extensively used in the design optimization of utility scale steam turbines. As an example, by simulating multiple startup scenarios of steam power plants, engineers can obtain turbine ... -
Systematic Reduction of Detailed Chemical Reaction Mechanisms for Engine Applications
(The American Society of Mechanical Engineers (ASME), 2017)In this work, we apply a sequence of concepts for mechanism reduction on one reaction mechanism including novel quality control. We introduce a moment-based accuracy rating method for species profiles. The concept is used ... -
An Optimum Design Approach for Textured Thrust Bearing With Elliptical-Shape Dimples Using Computational Fluid Dynamics and Design of Experiments Including Cavitation
(The American Society of Mechanical Engineers (ASME), 2017)Textured thrust bearings are capable of providing higher load capacity and lower friction torque compared to nontextured bearings. However, most previous optimization efforts for texturing geometry were focused on rectangular ...