Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2341-2360 of 9564
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Reduced Order Modeling for Multistage Bladed Disks With Friction Contacts at the Flange Joint
(The American Society of Mechanical Engineers (ASME), 2018)Most aircraft turbojet engines consist of multiple stages coupled by means of bolted flange joints which potentially represent source of nonlinearities due to friction phenomena. Methods aimed at predicting the forced ... -
High-Performance Computing and Analysis-Led Development of High Efficiency Dilute Opposed Piston Gasoline Engine
(The American Society of Mechanical Engineers (ASME), 2018)Pinnacle is developing a multicylinder 1.2 L gasoline engine for automotive applications using high-performance computing (HPC) and analysis methods. Pinnacle and Oak Ridge National Laboratory executed large-scale ... -
Identification of Asynchronous Blade Vibration Parameters by Linear Regression of Blade Tip Timing Data
(The American Society of Mechanical Engineers (ASME), 2018)Fracture of blades is usually catastrophic and creates serious damages in the turbomachines. Blades are subjected to high centrifugal force, oscillating stresses, and high temperature which makes their life limited. ... -
Three-Dimensional Aerodynamic Analysis of a Darrieus Wind Turbine Blade Using Computational Fluid Dynamics and Lifting Line Theory
(The American Society of Mechanical Engineers (ASME), 2018)Due to the rapid progress in high-performance computing and the availability of increasingly large computational resources, Navier–Stokes (NS) computational fluid dynamics (CFD) now offers a cost-effective, versatile, and ... -
Engine-Control Impact on Energy Balances for Two-Stroke Engines for 10–25 kg Remotely Piloted Aircraft
(The American Society of Mechanical Engineers (ASME), 2018)The rapid expansion of the market for remotely piloted aircraft (RPA) includes a particular interest in 10–25 kg vehicles for monitoring, surveillance, and reconnaissance. Power-plant options for these aircraft are often ... -
Development of Reliable NARX Models of Gas Turbine Cold, Warm, and Hot Start-Up
(The American Society of Mechanical Engineers (ASME), 2018)This paper documents the setup and validation of nonlinear autoregressive network with exogenous inputs (NARX) models of a heavy-duty single-shaft gas turbine (GT). The data used for model training are time series datasets ... -
On the Force Coefficients of a Flooded, Open Ends Short Length Squeeze Film Damper: From Theory to Practice (and Back)
(The American Society of Mechanical Engineers (ASME), 2018)Gas turbine aircraft engine manufacturers push for simple squeeze film damper (SFD) designs, short in length, yet able to provide enough damping to ameliorate rotor vibrations. SFDs employ orifices to feed lubricant directly ... -
Short Helical Combustor: Flow Control in a Combustion System With Angular Air Supply
(The American Society of Mechanical Engineers (ASME), 2018)The concept of the novel short helical combustor (SHC) was investigated in our previous work (Ariatabar et al., 2016, “Short Helical Combustor: Concept Study of an Innovative Gas Turbine Combustor With Angular Air Supply,” ... -
Effects of Real Gas Model Accuracy and Operating Conditions on Supercritical CO2 Compressor Performance and Flow Field
(The American Society of Mechanical Engineers (ASME), 2018)Rankine and Brayton cycles are common energy conversion cycles and constitute the basis of a significant proportion of global electricity production. Even a seemingly marginal improvement in the efficiency of these cycles ... -
Experimental Validation of a Three-Component Surrogate for Sasol-Isoparaffinic Kerosene in Single Cylinder Diesel Engine and Ignition Quality Tester
(The American Society of Mechanical Engineers (ASME), 2018)Surrogates development is important to extensively investigate the combustion behavior of fuels. Development of comprehensive surrogates has been focusing on matching chemical and physical properties of their target fuel ... -
Numerical Investigation of the Flow Behavior Inside a Supercritical CO2 Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2018)Centrifugal compressors are one of the best choices among compressors in supercritical Brayton cycles. A supercritical CO2 centrifugal compressor increases the pressure of the fluid which state is initially very close to ... -
Quantitative Computational Fluid Dynamics Analyses of Particle Deposition in a Heavy-Duty Subsonic Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2018)Solid particle ingestion is one of the principal degradation mechanisms in the compressor and turbine sections of gas turbines. In particular, in industrial applications, the microparticles not captured by the air filtration ... -
Convective Scaling of Intrinsic Thermo-Acoustic Eigenfrequencies of a Premixed Swirl Combustor
(The American Society of Mechanical Engineers (ASME), 2018)Spectral distributions of the sound pressure level (SPL) observed in a premixed, swirl stabilized combustion test rig are scrutinized. Spectral peaks in the SPL for stable as well as unstable cases are interpreted with the ... -
Performance Evaluation of a Molten Carbonate Fuel Cell/Micro Gas Turbine Hybrid System With Oxy-Combustion Carbon Capture
(The American Society of Mechanical Engineers (ASME), 2018)Owing to the increasing consumption of fossil fuels and emission of greenhouse gases, interests in highly efficient and low carbon emitting power systems are growing fast. Several research groups have been suggesting ... -
Catalyst Ammonia Storage Measurements Using Radio Frequency Sensing1
(The American Society of Mechanical Engineers (ASME), 2018)Motivated by increasingly strict nitrogen oxides (NOx) limits, engine manufacturers have adopted selective catalytic reduction (SCR) technology to reduce engine-out NOx. In the SCR process, NOx react with ammonia (NH3) to ... -
Thermal and Transport Properties for the Simulation of Direct-Fired sCO2 Combustor
(The American Society of Mechanical Engineers (ASME), 2017)The direct-fired supercritical CO2 (sCO2) cycle is currently considered as a zero-emission power generation concept. It is of interest to know how to optimize various components of this cycle using computational tools; ... -
Oral Assessments of Student Learning in Undergraduate Aerospace Propulsion and Power Courses
(The American Society of Mechanical Engineers (ASME), 2017)A purposeful approach has been taken to match teaching pedagogies (techniques), learning experiences, and assessment methods to various types of students learning in undergraduate aerospace propulsion courses at the ... -
Gas Turbine Compressor Fouling and Washing in Power and Aerospace Propulsion
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents a well-researched subject area within academia, with a high degree of application in the industry. Compressor fouling effect is one of the commonest degradations associated with gas turbine operations. ... -
Formation of Soot in Ethylene–Air Partially Premixed Flames Over a Wide Range of Premixedness
(The American Society of Mechanical Engineers (ASME), 2017)This paper reports an investigation of soot formation in ethylene–air partially premixed flames (PPFs) over a wide range of premixedness. An axisymmetric co-flow configuration is chosen to establish PPFs from the fully ... -
CO and H2O Time-Histories in Shock-Heated Blends of Methane and Ethane for Assessment of a Chemical Kinetics Model
(The American Society of Mechanical Engineers (ASME), 2017)Methane and ethane are the two main components of natural gas and typically constitute more than 95% of it. In this study, a mixture of 90% CH4/10% C2H6 diluted in 99% Ar was studied at fuel lean (equiv. ratio = 0.5) ...