Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1201-1220 of 9564
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Design and Analysis of an Aircraft Thermal Management System Linked to a Low Bypass Ratio Turbofan Engine
(The American Society of Mechanical Engineers (ASME), 2021)The design of an aircraft thermal management system (TMS) that is capable of rejecting heat loads into the bypass stream of a typical low-bypass ratio turbofan engine, or a ram-air stream, is investigated. The TMS consists ... -
Transient Thermo-Acoustic Responses of Methane/Hydrogen Flames in a Pressurized Annular Combustor
(The American Society of Mechanical Engineers (ASME), 2021)The present article experimentally investigates the triggering and transient growth of azimuthal instabilities in a pressurized laboratory-scale annular combustor featuring 12 methane/hydrogen flames, as the equivalence ... -
Experimental Investigation of Secondary Flows and Length Reduction for a Low-Pressure Compressor Transition Duct
(The American Society of Mechanical Engineers (ASME), 2021)The need to reduce fuel-burn and emissions is pushing turbofan engines toward geared architectures with higher bypass ratios and small ultrahigh-pressure ratio cores. However, this increases the radial offset between ... -
Accelerated Creep Test Qualification of Creep-Resistance Using the Wilshire–Cano–Stewart Constitutive Model and Stepped Isostress Method
(The American Society of Mechanical Engineers (ASME), 2021)In this study, a qualification of accelerated creep-resistance of Inconel 718 is assessed using the novel Wilshire–Cano–Stewart (WCS) model and the stepped isostress method (SSM) and predictions are made to conventional ... -
Describing the Mechanism of Instability Suppression Using a Central Pilot Flame With Coupled Experiments and Simulations
(The American Society of Mechanical Engineers (ASME), 2021)Pilot flames are commonly used to extend combustor operability limits and suppress combustion oscillations in low-emissions gas turbines. Combustion oscillations, a coupling between heat release rate oscillations and ... -
A Study on Fundamental Combustion Properties of Oxymethylene Ether-2
(The American Society of Mechanical Engineers (ASME), 2021)Oxymethylene ethers (OMEn, n = 1–5) are a promising class of synthetic fuels that have the potential to be used as additives or substitutes to diesel in compression ignition engines. A comprehensive understanding of their ... -
Carbon and Hydrocarbon Particle Seeding in Air-Breathing Rotating Detonation Engine
(The American Society of Mechanical Engineers (ASME), 2021)Within the power generation community, the rotating detonation engine (RDE) is only growing in popularity with its increased performance, simple mechanism, and operation. Although significant testing is underway to ... -
Reducing Uncertainty in the Onset of Combustion Instabilities Using Dynamic Pressure Information and Bayesian Neural Networks
(The American Society of Mechanical Engineers (ASME), 2021)Modern low-emission combustion systems with improved fuel-air mixing are more prone to combustion instabilities and, therefore, use advanced control methods to balance minimum NOx emissions and the presence of thermoacoustic ... -
CO Emission Modeling in a Heavy Duty Annular Combustor Operating With Natural Gas
(The American Society of Mechanical Engineers (ASME), 2021)This paper summarizes the development of a large-eddy simulation (LES)-based approach for the prediction of CO emission in an industrial gas turbine combustor. Since the operating point of the modern combustors is really ... -
A Novel Large-Eddy Simulation-Based Process for NOx Emission Assessment in a Premixed Swirl Stabilized Combustion System
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents a new computational fluid dynamics (CFD) approach for the assessment of NOx emission. The methodology is validated against the experimental data of a heavy-duty gas turbine annular combustor. Since the ... -
High-Performance Computing Probabilistic Fracture Mechanics Implementation for Gas Turbine Rotor Disks on Distributed Architectures Including Graphics Processing Units
(The American Society of Mechanical Engineers (ASME), 2021)We present an efficient Monte Carlo-based probabilistic fracture mechanics simulation implementation for heterogeneous high-performance computing (HPC) architectures including central processing units (CPUs) and graphics ... -
Achieving Better Power Plant Guarantees Through a New Exergy-Based Approach for the HRSG
(The American Society of Mechanical Engineers (ASME), 2021)The best assurance an owner has to maximize the performance of the entire combined cycle power plant is the perfect alignment of heat recovery steam generator (HRSG) performance guarantee metrics to this goal. Currently, ... -
Detection of Machinery Failure Signs From Big Time-Series Data Obtained by Flow Simulation of Intermediate-Pressure Steam Turbines
(The American Society of Mechanical Engineers (ASME), 2021)The periodic maintenance, repair, and overhaul (MRO) of turbine blades in thermal power plants are essential to maintain a stable power supply. During MRO, older and less-efficient power plants are put into operation, which ... -
An Investigation of the Tapered Strut on Aerodynamic Performance of the Exhaust Diffuser Under Different Swirls
(The American Society of Mechanical Engineers (ASME), 2021)The strut structure directly affects the flow-field characteristics and aerodynamic performance of the gas turbine exhaust diffuser. Based on verifying the reliability of the numerical method, the exhaust diffuser with ... -
Experimental Study of a Novel Centrifugal Compressor With Two Successive and Independent Rotors
(The American Society of Mechanical Engineers (ASME), 2021)This study deals with a low pressure-ratio centrifugal compressor consisting of two counter-rotating rotors called a counter-rotating centrifugal compressor (CRCC). The design method based on the loss model was presented ... -
Flamelet Versus Detailed Chemistry Large Eddy Simulation for a Liquid-Fueled Gas Turbine Combustor: A Comparison of Accuracy and Computational Cost
(The American Society of Mechanical Engineers (ASME), 2021)A Honeywell liquid-fueled gas turbine test combustor at idle conditions is numerically investigated in simcenterstar-ccm+ version 2020.3. This work presents large eddy simulation (LES) results using both the flamelet ... -
Relative Effects of Velocity- and Mixture-Coupling in a Thermoacoustically Unstable, Partially Premixed Flame
(The American Society of Mechanical Engineers (ASME), 2021)Combustion instability, which is the result of a coupling between combustor acoustic modes and unsteady flame heat release rate, is a severely limiting factor in the operability and performance of modern gas turbine engines. ... -
An Extrema Approach to Probabilistic Creep Modeling in Finite Element Analysis
(The American Society of Mechanical Engineers (ASME), 2021)This paper introduces a computationally efficient extrema approach for the probabilistic predictions of creep in finite element analysis (FEA). Component-level probabilistic simulations are needed to assess the reliability ... -
Electrochemical Defect Analysis of Additive Manufactured Components
(The American Society of Mechanical Engineers (ASME), 2021)Due to more freedom in design and flexibility in production, parts produced by additive manufacturing (AM) technologies offer a huge potential for the manufacture of turbomachinery components. Because of the layer by layer ... -
Study of the Effect of Air Injection on the Surge and Flow Characteristic of Compressor and the Pumping Loss in a Heavy-Duty Turbocharged Natural Gas Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2021)In this study, bench tests of a heavy-duty turbocharged natural gas spark ignition engine were conducted with intake air injection at full load and different engine speeds. The flow characteristic of the compressor was ...