Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2081-2100 of 9564
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Thermochemical Mechanism Optimization for Accurate Predictions of CH Concentrations in Premixed Flames of C1–C3 Alkane Fuels
(The American Society of Mechanical Engineers (ASME), 2018)Increasingly stringent regulations on NOx emissions are enforced by governments owing to their contribution in the formation of ozone, smog, fine aerosols, acid rains, and nutrient pollution of surface water, which affect ... -
Data-Driven Predesign Tool for Small-Scale Centrifugal Compressor in Refrigeration
(The American Society of Mechanical Engineers (ASME), 2018)Domestic scale heat pumps and air conditioners are mainly driven by volumetric compressors. Yet the use of reduced scale centrifugal compressors is reconsidered due to their high efficiency and power density. The design ... -
Spark Advance Modeling of Hydrogen-Fueled Spark Ignition Engines Using Combustion Descriptors
(The American Society of Mechanical Engineers (ASME), 2018) -
Multivariate Response Rotordynamic Modeling and Sensitivity Analysis of Tilting Pad Bearings
(The American Society of Mechanical Engineers (ASME), 2018)Achieving an optimal design of journal bearings is a very challenging effort due to the many input and output variables involved, including rotordynamic and tribological responses. This paper demonstrates the use of a ... -
On the Real-Time Estimation of Disk Temperature Spatial Distributions in Aeroengines
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents a novel approach to real-time modeling of disk temperature distribution using proper orthogonal decomposition (POD). The method combines singular value decomposition (SVD) techniques with a series of ... -
The Effects of Fluid Preswirl and Swirl Brakes Design on the Performance of Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2018) -
A Numerical Investigation of the Effect of Inlet Preswirl Ratio on Rotordynamic Characteristics of Labyrinth Seal
(The American Society of Mechanical Engineers (ASME), 2018)Full three-dimensional (3D) computational fluid dynamics (CFD) simulations are carried out using ANSYS cfx to obtain the detailed flow field and to estimate the rotordynamic coefficients of a labyrinth seal for various ... -
Prediction of Combustion Noise in a Model Combustor Using a Network Model and a LNSE Approach
(The American Society of Mechanical Engineers (ASME), 2018)The reduction of pollution and noise emissions of modern aero engines represents a key concept to meet the requirements of the future air traffic. This requires an improvement in the understanding of combustion noise and ... -
Investigation of Hydrostatic Fluid Forces in Varying Clearance Turbomachinery Seals
(The American Society of Mechanical Engineers (ASME), 2018)Varying clearance, rotor-following seals are a key technology for meeting the demands of increased machine flexibility for conventional power units. These seals follow the rotor through hydrodynamic or hydrostatic mechanisms. ... -
Compressible Large Eddy Simulation of a Francis Turbine During Speed-No-Load: Rotor Stator Interaction and Inception of a Vortical Flow
(The American Society of Mechanical Engineers (ASME), 2018)This work investigates the unsteady pressure fluctuations and inception of vortical flow in a hydraulic turbine during speed-no-load conditions. At speed-no-load (SNL), the available hydraulic energy dissipates to the ... -
Combustion Model for a Homogeneous Turbocharged Gasoline Direct-Injection Engine
(The American Society of Mechanical Engineers (ASME), 2018)Homogeneous charge is a preferred operation mode of gasoline direct-injection (GDI) engines. However, a limited amount of work exists in the literature for combustion models of this mode of engine operation. Current work ... -
Investigation Into the Thermal Limitations of Steam Turbines During Start-Up Operation
(The American Society of Mechanical Engineers (ASME), 2018)Liberalized electricity market conditions and concentrating solar power technologies call for increased power plant operational flexibility. Concerning the steam turbine (ST) component, one key aspect of its flexibility ... -
First and Second Law Analysis of Radical Intercooling Concepts
(The American Society of Mechanical Engineers (ASME), 2018)An exergy framework was developed taking into consideration a detailed analysis of the heat exchanger (HEX) (intercooler (IC)) component irreversibilities. Moreover, it was further extended to include an adequate formulation ... -
Buoyancy-Induced Flow and Heat Transfer in Compressor Rotors
(The American Society of Mechanical Engineers (ASME), 2018)The buoyancy-induced flow and heat transfer inside the compressor rotors of gas-turbine engines affects the stresses and radial growth of the compressor disks, and it also causes a temperature rise in the axial throughflow ... -
The Wing Foil: A Novel Compliant Radial Foil Bearing Design
(The American Society of Mechanical Engineers (ASME), 2018)To meet the challenging demands for high performance, affordable compliant foil bearings (CFBs), a novel compliant support element has been developed. This recently patented, novel support element uses a multidimensional ... -
Theoretical Model of Buoyancy-Induced Heat Transfer in Closed Compressor Rotors
(The American Society of Mechanical Engineers (ASME), 2018)The cavities between the rotating compressor disks in aero-engines are open, and there is an axial throughflow of cooling air in the annular space between the center of the disks and the central rotating compressor shaft. ... -
Optimization of the Straight-Through Labyrinth Seal With a Smooth Land
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents the methodology and results of the optimization of a straight-through labyrinth seal with two inclined fins against smooth-land. The optimization was performed using commercial tools implemented in the ... -
Thermoacoustic Damping Rate Determination From Combustion Noise Using Bayesian Statistics
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, we present a method to determine the quantitative stability level of a lean-premixed combustor from dynamic pressure data. Specifically, we make use of the autocorrelation function of the dynamic pressure ... -
Experimental Study of Transient Mechanisms of Bistable Flame Shape Transitions in a Swirl Combustor
(The American Society of Mechanical Engineers (ASME), 2018)Sudden changes of flame shape are an undesired, yet poorly understood feature of swirl combustors used in gas turbines. The present work studies flame shape transition mechanisms of a bistable turbulent swirl flame in a ... -
Method of Identifying Injector Coking From the Spray Field of Mechanical and CRDi Injectors Using Intensity of Scattered Light
(The American Society of Mechanical Engineers (ASME), 2018)The influence of injector coking deposits on the spray field of single-hole mechanical port fuel injectors and multihole common rail direct injection (CRDi) injectors was studied using light scattering technique coupled ...