Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1261-1280 of 9564
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Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow
(The American Society of Mechanical Engineers (ASME), 2021)In recent years, multiphase pumps have become more and more popular because of the capability to simplify the process, reduce the footprint, and lower the cost. To compensate for the axial thrust force, an annular seal is ... -
Constituent and Ply-Level Understanding of Electrical Resistance in Si-Containing SiC/SiC Composites
(The American Society of Mechanical Engineers (ASME), 2021)Electrical resistance (ER), also known as direct current potential drop, has been demonstrated as an enabling means to monitor damage evolution in SiC-based ceramic matrix composites (CMCs). For laminate composites, it has ... -
In-Service Reliability Assessment of Turbine Blade Thermal Barrier Coatings Based on a Novel Cumulative Damage Index Model
(The American Society of Mechanical Engineers (ASME), 2021)Thermal barrier coating (TBC) has been used widely on turbine blades to provide temperature and oxidation protection. With the turbine inlet temperature continuously increasing, TBCs have become more likely to oxide ... -
Effect of Spray-Wall Interaction on Thermoacoustic Instability Prediction by Flame Transfer Function and the Convective Time Delay Method
(The American Society of Mechanical Engineers (ASME), 2021)This study numerically investigates the effect of spray-wall interactions on thermoacoustic instability prediction. The large-eddy simulations (LES)-based flame transfer function (FTF) and the convective time delay methods ... -
An Overview of Flow Instabilities Occurring in Centrifugal Compressors Operating at Low Flow Rates
(The American Society of Mechanical Engineers (ASME), 2021)Researchers from all over the world have been researching the aerodynamics of centrifugal compressors. They have explained many properties of the aerodynamic phenomena occurring in centrifugal compressors during their ... -
Modeling the Transport of Fuel Mixture Perturbations and Entropy Waves in the Linearized Framework
(The American Society of Mechanical Engineers (ASME), 2021)In this paper, a new method is introduced to model the transport of entropy waves and equivalence ratio fluctuations in turbulent flows. The model is based on the Navier–Stokes equations and includes a transport equation ... -
Fretting Fatigue—An Integral Simulation Approach to Strengthening by Shot Peening
(The American Society of Mechanical Engineers (ASME), 2021)Fretting fatigue is a limiting factor in blade attachment design for turbomachinery. Shot peening is known to be a strength increasing measure against fatigue. It is applied not only to free surfaces of components under ... -
Incipient Surge Analysis in Time and Frequency Domain for Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2021)The use of centrifugal compressors has been increasing tremendously in the last decade as they are a key component in the present energy scenario both in the modern internal combustion engine design and in advanced cycles ... -
The Effect of Windscreens and Walkways on Air-Cooled Condenser Performance and Fan Blade Dynamic Loading
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents a relative comparison of the impact of cruciform screens, perimeter screens, and walkways on 3 × 6 cells forced draft air-cooled condenser's (ACC) thermal performance and dynamic fan blade loading under ... -
Development and Application of an Internal Heat Transfer Measurement Technique for Cooled Real Engine Components1
(The American Society of Mechanical Engineers (ASME), 2021)The aim of this work is to present the development and application of a measurement technique that allows to record internal heat transfer features of real components. In order to apply this method, based on similar ... -
Unveiling the Flow Behavior Inside Gasoline Direct Injection Engine Cylinder Using High-Speed Time-Resolved Particle Image Velocimetry and Computational Fluid Dynamics Simulation
(The American Society of Mechanical Engineers (ASME), 2021)ricardo-vectis computational fluid dynamics simulation of the in-cylinder air flow was first validated with those of the experimental results from high-speed particle image velocimetry (PIV) measurements taking cognizant ... -
Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part II: Droplet Behavior in the Chamber
(The American Society of Mechanical Engineers (ASME), 2021)Within aeroengines, bearing chambers exhibit a highly complex two-phase environment as a result of the complex air/oil interactions. The desire to operate at both higher temperatures and shaft speeds requires a sufficient ... -
Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part I: Film Behavior Near the Bearing
(The American Society of Mechanical Engineers (ASME), 2021)Previous work at the Gas Turbine and Transmissions Research Center (G2TRC) has highlighted the need for an adequate computational model, which can appropriately model the oil shedding behavior from bearings. Oil can break ... -
Investigating the Influence of Impeller Axial Thrust Balance Holes on the Flow and Overall Performance of a Cryogenic Liquid Turbine Expander
(The American Society of Mechanical Engineers (ASME), 2021)An excessive rotor axial thrust in any turbomachine can cause critical operational problems, and rotor axial thrust balancing has always attracted much attention. The present numerical study is focused on axial thrust ... -
Effect of Eccentricity and Surface Roughness on Probabilistic Performance of Two Axial Groove Bearing
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents the effect of eccentricity and surface roughness on the probabilistic performance of two axial groove hydrodynamic journal bearing. In general, it is difficult to quantify experimentally the variabilities ... -
A Probabilistic Model for Forging Flaw Crack Nucleation Processes
(The American Society of Mechanical Engineers (ASME), 2021)A probabilistic model for quantifying the number of load cycles for nucleation of forging flaws into a crack has been developed. The model correlates low cycle fatigue (LCF) data, ultrasonic testing (UT) indication data, ... -
Detailed Evaluation of Automotive Turbocharged Diesel Engine During Typical Transient Working Condition Based on Thermodynamic Analysis
(The American Society of Mechanical Engineers (ASME), 2021)In this study, the impacts of transient time, intake air temperature, coolant temperature, and piecewise transient strategies on energy and exergy terms during typical transient process of automotive diesel engine were ... -
A Study of Influences of Inlet Total Pressure Distortions on Clearance Flow in an Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2021)The rotating distortion generated by upstream wakes or low speed flow cells is a kind of phenomenon in the inlet of middle and rear stages of an axial compressor. Highly complex inflow can obviously affect the performance ... -
Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping
(The American Society of Mechanical Engineers (ASME), 2021)The fatigue life behavior and internal surface conditions of inherently damped additive manufactured (AM) specimens subjected to vibration bending are under investigation. This study supports research that demonstrated 95% ... -
Numerical and Experimental Investigation of a Low Order Radial Turbine Model for Engine-Level Optimization of Turbocharger Design
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents the development and validation of a meanline model by means of numerical and experimental methods, to determine it's feasibility as an optimization tool for turbocharger matching. Using a parametric ...