Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1681-1700 of 9564
-
A Statistical Characterization of the Effects and Interactions of Small and Large Mistuning on Multistage Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2020)As turbomachinery systems continue to push the limits of modern technology, the modeling techniques being developed also continue to push modern computational limits. While modeling the pristine system during the design ... -
Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions
(The American Society of Mechanical Engineers (ASME), 2020)Foreign object impact of ceramic matrix composite (CMC) materials and components in a gas turbine engine environment could be detrimental to engine performance and hence must be accounted for in the design of such components. ... -
Three-Dimensional Computational Loss Analysis of a Compressor for Heavy Duty Truck Engine Turbochargers
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a detailed loss analysis of a centrifugal compressor stage with a vaned diffuser for application in a heavy-duty engine turbocharger. The analysis is carried out in order to investigate the loss ... -
Adaptive Control of Microgas Turbine for Engine Degradation Compensation
(The American Society of Mechanical Engineers (ASME), 2020)Microgas turbine (MGT) engines in the range of 1–100 kW are playing a key role in distributed generation applications, due to the high reliability and quick load following that favor their integration with intermittent ... -
Experimental Study of Spark Plasma Stretching and Combustion Variations Analysis Using Flame Luminosity Images From an Optically Accessible Internal Combustion Engine
(The American Society of Mechanical Engineers (ASME), 2020)Understanding the behavior of spark plasma and flame initiation in internal combustion engines leads to improvement in fuel economy and exhaust emissions. This paper experimentally investigated spark plasma stretching and ... -
Simulation of the Deposit Evolution on a Fan Blade for Tunnel Ventilation
(The American Society of Mechanical Engineers (ASME), 2020)Fans used in tunnel ventilation operate for decades in an atmosphere that carries dust, soot, and other solid particles. The formation of deposit on the rotor blades, considering a so long time of exposition to this ... -
Erosion in a Melt-Infiltrated SiC/SiC Ceramic Matrix Composite
(The American Society of Mechanical Engineers (ASME), 2020)Erosion phenomenon of ceramic matrix composites (CMCs), attributed to their unique architectural configurations, is markedly different from conventional monolithic ceramic counterparts. Prior to further integration of CMCs ... -
Experimental Rotordynamic Force Coefficients for a Diffusion Bonded Compliant Hybrid Journal Gas Bearing Utilizing Fluid-Filled Hermetic Dampers
(The American Society of Mechanical Engineers (ASME), 2020)Dynamic force coefficients are presented from experimental results of a radial gas bearing with hermetically sealed squeeze film dampers (HSFDs) in the bearing support. HSFDs are a relatively new technology aimed to increase ... -
CH Kinetics Measurements and Their Importance for Modeling Prompt NOx Formation in Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2020)Recent work by the authors and others has uncovered the need for further chemical kinetic-related modeling and experiments, specifically for NOx kinetics at engine conditions. In particular, data on CH formation at realistic ... -
An Instrumented High-Speed Rotor With Embedded Telemetry for the Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept
(The American Society of Mechanical Engineers (ASME), 2020)Pressure is the constitutive quantity governing the flow field in gas lubricated bearings. Knowledge of the pressure is of principal importance in the fundamental understanding of such bearings as well as for the validation ... -
Effect of Noise and Nonlinearities on Thermoacoustics of Can-Annular Combustors
(The American Society of Mechanical Engineers (ASME), 2020)Can-annular combustors consist of N distinct cans setup symmetrically around the axis of the gas turbine. Each can is connected to the turbine inlet by means of a transition duct. At the turbine inlet, a small gap between ... -
Influence of Blade Flexibility on the Dynamic Response Simulation of a Turbomolecular Pump on Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2020)This paper proposes the simulation of a complete mechanical model of a turbomolecular pump rotor, including rotor and blades flexibility, suspended by controlled active magnetic bearings. The mechanical model is composed ... -
Numerical Investigation of Nonisothermal Cavitating Flows on Hydrofoils by Means of an Extended Schnerr–Sauer Model Coupled With a Nucleation Model
(The American Society of Mechanical Engineers (ASME), 2020)This work aimed to investigate cavitating flows of water, liquid hydrogen, and nitrogen on hydrofoils numerically, using the open source code openfoam. The Eulerian homogeneous mixture approach has been used, consisting ... -
Reduced Order Models for Nonlinear Dynamic Analysis With Application to a Fan Blade
(The American Society of Mechanical Engineers (ASME), 2020)In this work, reduced order models (ROM) that are independent from the full order finite element models (FOM) considering geometrical nonlinearities are developed and applied to the dynamic study of a fan. The structure ... -
Improved Method for Gas-Turbine Off-Design Performance Adaptation Based on Field Data
(The American Society of Mechanical Engineers (ASME), 2020)Obtaining accurate components' characteristic maps has great significant for gas-turbine operating optimization and gas-path fault diagnosis. A common approach is to modify the original components' characteristic maps by ... -
Efficient Robust Design for Thermoacoustic Instability Analysis: A Gaussian Process Approach
(The American Society of Mechanical Engineers (ASME), 2020)In the preliminary phase of analyzing the thermoacoustic characteristics of a gas turbine combustor, implementing robust design principles is essential to minimize detrimental variations of its thermoacoustic performance ... -
Numerical Investigations of Pollutant Emissions From Novel Heavy-Duty Gas Turbine Burners Operated With Natural Gas
(The American Society of Mechanical Engineers (ASME), 2020)A numerical investigation of pollutant emissions of a novel dry low-emissions burner for heavy-duty gas turbine applications is presented. The objective of this work is to develop and assess a robust and cost-efficient ... -
Modeling Deposit Erosion in Internal Turbine Cooling Geometries
(The American Society of Mechanical Engineers (ASME), 2020)Experiments were performed to study the erosion of deposit structures due to large particle impacts (>5 μm). Cone-shaped dust deposits were created in an oversized (6.35 mm diameter) impingement cooling jet at 811 K ... -
Design, Optimization, and Analysis of Supersonic Radial Turbines
(The American Society of Mechanical Engineers (ASME), 2020)New compact engine architectures such as pressure gain combustion require ad hoc turbomachinery to ensure an adequate range of operation with high performance. A critical factor for supersonic turbines is to ensure the ... -
Solution of Thermoacoustic Eigenvalue Problems With a Noniterative Method
(The American Society of Mechanical Engineers (ASME), 2020)Gas turbine combustors are prone to undesirable combustion dynamics in the form of thermoacoustic oscillations. Analysis of the stability of thermoacoustic systems in the frequency domain leads to nonlinear eigenvalue ...