Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1381-1400 of 9564
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Proof of Concept for a Novel Interstage Injection Design in Axial Compressors
(The American Society of Mechanical Engineers (ASME), 2021)A common technique to increase the thermal efficiency and the power output of gas turbines is to inject water upstream of the compressor section. Through the evaporation of the water throughout the compressor, an isothermal ... -
Laminar Flame Characteristics of Sequential Two-Stage Combustion of Premixed Methane/Air Flames
(The American Society of Mechanical Engineers (ASME), 2021)Due to their high load flexibility and air-quality benefits, axial (sequential) stage combustion systems have become more popular among ground-based power gas turbine combustors. However, inert combustion residuals passing ... -
Evaluation of the Creep Strength of 9Cr-1Mo-V and 1Cr-1Mo-1/4V Castings and Weldments Using Accelerated Creep Testing
(The American Society of Mechanical Engineers (ASME), 2021)The traditional method to generate creep data requires several long term tests; in some cases upward of 100,000 h. These tests are often time and cost prohibitive to perform. Creep data in literature are limited to commonly ... -
Vibration Analyses of an Axial Turbine Wheel With Intentional Mistuning
(The American Society of Mechanical Engineers (ASME), 2021)The last-stage bladed disk of a steam turbine is analyzed with respect to both flutter susceptibility and limitation of forced response. Due to the lack of variable stator vanes, unfavorable flow conditions may occur, which ... -
Effect of an Azimuthal Mean Flow on the Structure and Stability of Thermoacoustic Modes in an Annular Combustor Model With Electroacoustic Feedback
(The American Society of Mechanical Engineers (ASME), 2021)Thermoacoustic oscillations in axisymmetric annular combustors are generally coupled by degenerate azimuthal modes, which can be of standing or spinning nature. Symmetry breaking due to the presence of a mean azimuthal ... -
Wall-Modeled Large Eddy Simulations of Axial Turbine Rim Sealing
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents wall-modeled large-eddy simulations (WMLES) of a chute-type turbine rim seal. Configurations with an axisymmetric annulus flow and with nozzle guide vanes fitted (but without rotor blades) are considered. ... -
Experimental Two-Phase Flow Analysis Inside a Laboratory Scale Jet-Engine Combustion Chamber Using Particle Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2021)The characterization of the two-phase kerosene/air flow near the nozzle of an aero-engine combustor is important in order to understand the combustion characteristics of the burner. Typically, particle image velocimetry ... -
Application of Spectral Method for Vibration-Induced High-Cycle Fatigue Evaluation of an High-Pressure Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2021)A method of fluid–structure interaction coupling is implemented for a forced-response, vibration-induced fatigue life estimation of a high-pressure turbine blade. Two simulations approaches; a two-way (fully coupled) and ... -
Study on the Reduction of the Resonant Stress of Turbine Blades Caused by the Stage Interaction Force (Simultaneous Optimization of Blade Resonant Stress and Amount of Unbalance)
(The American Society of Mechanical Engineers (ASME), 2021)Although the bladed disks of turbomachinery are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of individual blades on a disk vary slightly owing to manufacturing tolerances, ... -
Prestall Disturbances and Stall Inception for an Eccentric Low-Speed Axial Compressor With Inlet Swirl
(The American Society of Mechanical Engineers (ASME), 2021)Owing to the manufacturing and assembly error or the fatigue of long-time operation, nonaxisymmetric tip clearance is actually a common phenomenon in compressors. It is also well accepted that tip leakage flow, associated ... -
Computational Simulations of Liquid Sprays in Crossflows With an Algorithmic Module for Primary Atomization
(The American Society of Mechanical Engineers (ASME), 2021)For simulations of liquid jets in crossflows, the primary atomization can be treated with the quadratic formula, which has been derived from integral form of conservation equations of mass and energy in our previous work. ... -
Fully Coupled Turbojet Engine Computational Fluid Dynamics Simulations and Cycle Analyses Along the Equilibrium Running Line
(The American Society of Mechanical Engineers (ASME), 2021)This work presents fully coupled computational fluid dynamics (CFD) simulations and thermodynamic cycle analyses of a small-scale turbojet engine at several conditions along the equilibrium running line. The CFD simulations ... -
On the Analytical Determination of the Nominal Stresses in Dovetail Attachments
(The American Society of Mechanical Engineers (ASME), 2021)Simple physical models are developed for the nominal contact stresses in dovetail attachments. These nominal stresses include the pressure, the shear traction, and the bending stress in the contact region, both during ... -
Influence of Manufacturing Variation on the Dynamic and Tribological Performance of Tilting Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2021)A robust approach to investigate a tilting pad journal bearing (TPJB) as a whole tolerance stack-up assembly is presented. Normal component variation within actual design tolerances is considered. The vector loop is expanded ... -
Kriging Approach Dedicated to Represent Hydrodynamic Bearings
(The American Society of Mechanical Engineers (ASME), 2021)The mathematical modeling of journal bearings has advanced significantly since the Reynolds equation was first proposed. Advances in the processing capacity of computers and numerical techniques led to multiphysical models ... -
Numerical Investigation of a Partially Loaded Supersonic Organic Rankine Cycle Turbine Stage
(The American Society of Mechanical Engineers (ASME), 2021)The organic Rankine cycle (ORC) represents an emerging technology aimed at exploiting lower temperature heat sources, such as waste heat in industrial processes or exhaust heat in combustion engines. One key aspect of this ... -
Sizing and Operation of a Hybrid Energy Plant Composed of Industrial Gas Turbines, Renewable Energy Systems, and Energy Storage Technologies
(The American Society of Mechanical Engineers (ASME), 2021)Hybrid energy plants (HEPs), which include both fossil fuel technologies and renewable energy systems, can provide an important step toward a sustainable energy supply. In fact, the hybridization of renewable energy systems ... -
Impact of the Stabilized Finite Element Method on Acoustic and Vortical Perturbations in Thermoacoustic Systems
(The American Society of Mechanical Engineers (ASME), 2021)This paper seeks to advance linear stability analyses of thermoacoustic systems conducted with the stabilized finite element method (sFEM). Specifically, this work analyzes and quantifies the impact of the streamline-upw ... -
Aerodynamic Investigation of Guide Vane Configurations Downstream a Rotating Detonation Combustor
(The American Society of Mechanical Engineers (ASME), 2021)Any outlet restriction downstream of pressure gain combustion (PGC), such as turbine blades, affects its flow field and may cause additional thermodynamic losses. The unsteadiness in the form of pressure, temperature, and ... -
Computational and Experimental Studies of Cellular Samples Manufactured Using Additive Methods for Use in Advanced Lightweight Designs of Engine Parts
(The American Society of Mechanical Engineers (ASME), 2021)The use of cellular structures is one way to reduce the weight of engine parts. However, the deformation behavior of cellular metallic structures differs significantly from that of conventional homogeneous materials. Samples ...