Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1221-1240 of 9564
-
High-Temperature Solid Particle Erosion in a Melt-Infiltrated SiC/SiC Ceramic Matrix Composite
(The American Society of Mechanical Engineers (ASME), 2021)Ceramic matrix composites are an enabling propulsion material system that offer weight benefits over current Ni-based superalloys, and have higher temperature capabilities that can reduce cooling requirements. Incorporating ... -
Ignition Delay Time Correlation of C1–C5 Natural Gas Blends for Intermediate and High Temperature Regime
(The American Society of Mechanical Engineers (ASME), 2021)New ignition delay time (IDT) data for stoichiometric natural gas (NG) blends composed of C1–C5 n-alkanes with methane as the major component were recorded using a high pressure shock tube (HPST) at reflected shock pressures ... -
A Non-Compact Effective Impedance Model for Can-to-Can Acoustic Communication: Analysis and Optimization of Damping Mechanisms
(The American Society of Mechanical Engineers (ASME), 2021)Can-annular combustors can feature azimuthal instabilities even if the acoustic coupling between the individual cans is weak. Recently, various studies have focused on modeling the acoustic communication between adjacent ... -
Impact of Mistuned Underplatform Dampers on the Nonlinear Vibration of Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2021)Before the final experimental validation and certification of a turbo-engine, designers perform a numerical simulation of its vibratory properties, among other things, in order to estimate its lifespan and adjust the design ... -
Dynamical Characterization of Thermoacoustic Oscillations in a Hydrogen-Enriched Partially Premixed Swirl-Stabilized Methane/Air Combustor
(The American Society of Mechanical Engineers (ASME), 2021)In this study, we systematically analyze the effects of hydrogen enrichment in the well-known PRECCINSTA burner, a partially premixed swirl-stabilized methane/air combustor. Keeping the equivalence ratio and thermal power ... -
Experimental Investigation on Nonlinear Response of a Low-Swirl Flame to Acoustic Excitation With Large Amplitude
(The American Society of Mechanical Engineers (ASME), 2021)Thermoacoustic instability is a major issue in developing high-efficiency low emission gas turbine combustors. In order to predict the amplitude of limit cycle oscillation, an understanding of the amplitude-dependent ... -
Techno-Economic Analysis of a Hydrogen Production and Storage System for the On-Site Fuel Supply of Hydrogen-Fired Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2021)Hydrogen-fired gas turbines have the potential to play an important role in future CO2-neutral energy and industry sectors. A prerequisite for the operation of hydrogen-fired gas turbines is the availability of sufficient ... -
Surge Prevention Techniques for a Turbocharged Solid Oxide Fuel Cell Hybrid System
(The American Society of Mechanical Engineers (ASME), 2021)Pressurized solid oxide fuel cell (SOFC) systems are one of the most promising technologies to achieve high energy conversion efficiencies and reduce pollutant emissions. The most common solution for pressurization is the ... -
Amplitude-Dependent Damping and Driving Rates of High-Frequency Thermoacoustic Oscillations in a Lab-Scale Lean-Premixed Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents the numerical investigations of amplitude-dependent stability behavior of thermoacoustic oscillations at screech level frequencies in a lean-premixed, atmospheric, swirl-stabilized, lab-scale gas turbine ... -
Acoustic-Convective Interference in Transfer Functions of Methane/Hydrogen and Pure Hydrogen Flames
(The American Society of Mechanical Engineers (ASME), 2021)We investigate the occurrence and source of modulations in the gain and phase of flame transfer functions (FTF) measured in perfectly premixed, bluff body stabilized CH4/H2 and pure H2 flames. The modulations are shown to ... -
Investigation on the Robustness of Rotor/Stator Contact Interactions With Respect to Small Mistuning
(The American Society of Mechanical Engineers (ASME), 2021)In this work, the impact of small mistuning on rotor/stator contact interactions is investigated. First, a detailed study of a rotor/stator interaction between the first bending modes and the second engine order is presented ... -
A Comparison Between Organic Rankine Cycle and Supercritical CO2 Bottoming Cycles for Energy Recovery From Industrial Gas Turbines Exhaust Gas
(The American Society of Mechanical Engineers (ASME), 2021)Gas turbines are often employed in the industrial field, especially for remote generation, typically required by oil and gas production and transport facilities. The huge amount of discharged heat could be profitably ... -
Study on Automatic Adaptation for Control-Oriented Model of Advanced Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2021)To achieve high thermal efficiency and low emission in automobile engines, advanced combustion technologies using compression auto-ignition of premixtures have been studied, and model-based control has attracted attention ... -
Response of Auto-Ignition-Stabilized Flames to One-Dimensional Disturbances: Intrinsic Response
(The American Society of Mechanical Engineers (ASME), 2021)Burning carbon-free fuels such as hydrogen in gas turbines promises power generation with strongly reduced greenhouse gas emissions. A two-stage combustor architecture with a propagation-stabilized flame in the first stage ... -
On the Performance of Wavy Dry Friction and Piezoelectric Hybrid Flexible Dampers
(The American Society of Mechanical Engineers (ASME), 2021)This paper proposes a flexible dry friction plate to mitigate the vibration of thin-walled structures for one resonance crossing. Based on a cantilever beam–friction damper finite element model, the geometry and material ... -
Experimental and Numerical Study for Improved Understanding of Mixed-Convection Type of Flows in Turbine Casing Cavities During Shut-Down Regimes
(The American Society of Mechanical Engineers (ASME), 2021)Due to an increase in the power generation from renewable sources, steam and gas turbines will be required to adapt for more flexible operations with frequent start-ups and shut-downs to provide load leveling capacity. ... -
Stability and Unbalance Analysis of Rigid Rotors Supported by Spiral Groove Bearings: Comparison of Different Approaches
(The American Society of Mechanical Engineers (ASME), 2021)The dynamic behavior of spiral-grooved gas bearing supported four degrees-of-freedom (DOF) rotors is investigated by means of linearized bearing force coefficients and full time-integrated transient analysis. The transient ... -
Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes
(The American Society of Mechanical Engineers (ASME), 2021)Criteria for assessing high cycle fatigue (HCF) capability are important for transitioning additive repair technologies to turbine engines. By studying the fatigue results of two additive repair technologies on Titanium ... -
Numerical Evaluation and High-Speed Rotating Test on Circular Arc Spring Dampers for Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2021)A circular arc spring damper (CASD) is a recently proposed fluid-film damper that has two or more arc-shaped centering springs and dual radial clearances formed by wire electric discharge machining (WEDM). CASD requires ... -
Predicting the Amplitude of Thermoacoustic Instability Using Universal Scaling Behavior
(The American Society of Mechanical Engineers (ASME), 2021)The complex interaction between the turbulent flow, combustion and the acoustic field in gas turbine engines often results in thermoacoustic instability that produces ruinously high-amplitude pressure oscillations. These ...