Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1361-1380 of 9564
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Experimental and Numerical Characterization of a Novel Natural Gas Low NOx Burner in Gas Turbine Realistic Environment
(The American Society of Mechanical Engineers (ASME), 2021)A fundamental milestone in the development of a low NOx burner technology is the demonstration of its capabilities in realistic environment. This is especially true for the novel burner subject of this paper, which has ... -
Synergistic Technology Combinations for Future Commercial Aircraft Using Liquid Hydrogen
(The American Society of Mechanical Engineers (ASME), 2021)Liquid hydrogen (LH2) has long been seen as a technically feasible fuel for a fully sustainable greener aviation future. The low density of the cryogenic fuel would dictate the redesign of commercial aircraft to accommodate ... -
Thermodynamic Investigation of an Irreversible Combined Stirling-Organic Rankine Cycle for Maximum Power Output Condition
(The American Society of Mechanical Engineers (ASME), 2021)A pragmatic approach is adopted to investigate irreversible thermodynamic combined cycle devices. The finite-time thermodynamic model of combined Stirling-organic Rankine cycle is formulated and evaluated for maximum output ... -
Containment and Arrest of Blade Shedding in Gas Turbine Engines Using Novel Dual-Ring Design
(The American Society of Mechanical Engineers (ASME), 2021)In this paper, we examine the energy absorption and containment capabilities of a newly proposed dual-ring design accounting for interactions between a released blade and fully bladed fan disk using three-dimensional finite ... -
Incipient Surge Detection in Large Volume Energy Systems Based on Wigner–Ville Distribution Evaluated on Vibration Signals
(The American Society of Mechanical Engineers (ASME), 2021)Compressor response investigation in nearly unstable operating conditions, like rotating stall and incipient surge, is a challenging topic nowadays in the turbomachinery research field. Indeed, turbines connected with ... -
Model-Based Unified Framework for Detection and Mitigation of Cyclic Torque Imbalance in a Gasoline Engine
(The American Society of Mechanical Engineers (ASME), 2021)Torque produced by the internal combustion (IC) engine is desired to be of similar value for consecutive combustion cycles; nevertheless, difference occurs in the cyclic torque due to uncertainties in its generation. ... -
Heavy Fuel Oil Combustion Characteristics Evaluation in Various Swirling Flow Conditions
(The American Society of Mechanical Engineers (ASME), 2021)Heavy fuel oil (HFO) is an economical fuel alternative for power generation as its low production cost and high energy density. However, its incomplete combustion induced by the presence of long-chain petroleum molecules ... -
Mitigation of Pressure Fluctuations From an Array of Pulse Detonation Combustors
(The American Society of Mechanical Engineers (ASME), 2021)An annular plenum is integrated downstream of six pulse detonation combustors arranged in a canannular configuration. The primary purpose of the plenum is the mitigation of pressure and velocity fluctuations, which is ... -
Ekman Layer Scrubbing and Shroud Heat Transfer in Centrifugal Buoyancy-Driven Convection
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents large-eddy and direct numerical simulations of buoyancy-driven convection in sealed and open rapidly rotating cavities for Rayleigh numbers in the range 107–109, and axial throughflow Reynolds numbers ... -
Efficient Steady and Unsteady Flow Modeling for Arbitrarily Mis-Staggered Bladerow Under Influence of Inlet Distortion
(The American Society of Mechanical Engineers (ASME), 2021)Accurate and efficient predictions of the steady and unsteady flow responses due to the blade-to-blade variation as well as due to the nonaxisymmetric inlet distortion have been continually pursued. Computation of two ... -
Improvement of the Inverse Finite Element Analysis Approach for Tensile and Toughness Predictions by Means of Small Punch Technique
(The American Society of Mechanical Engineers (ASME), 2021)This paper focuses on the inverse finite element analysis (FEA) to calculate the small punch technique (SPT) tests and the prediction of the tensile and fracture toughness behavior. For the description of the SPT tests via ... -
Transonic Fan Blade Redesign Approach to Attenuate Nonsynchronous Vibration
(The American Society of Mechanical Engineers (ASME), 2021)Due to manufacturing tolerance and deterioration during operation, different blades in a fan assembly exhibit geometric variability. This leads to asymmetry which will be amplified in the running geometry by centrifugal ... -
Best Architecture of an Artificial Neural Network to Model Prefilming Airblast Atomization: Not So Deep Learning
(The American Society of Mechanical Engineers (ASME), 2021)A fully connected artificial neural network (ANN) is used to predict the spray characteristics of prefilming airblast atomization. The model is trained from the planar prefilmer experiment from the Ph.D. thesis of Gepperth ... -
Optimization of CO Turndown for an Axially Staged Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2021)This paper reports on an optimization study of the CO turndown behavior of an axially staged combustor, in the context of industrial gas turbines (GTs). The aim of this work is to assess the optimally achievable CO turndown ... -
Probabilistic Fracture Mechanics for Mature Service Frame Rotors
(The American Society of Mechanical Engineers (ASME), 2021)Large gas turbine design and service business are challenged with increased demands toward flexible operations, increasing number of start-stop cycles, and intermediate cycles. Probabilistic fracture mechanics simulation ... -
Prediction of Rotor Burst Using Strain-Based Fracture Criteria to Comply With the Engine Airworthiness Regulation
(The American Society of Mechanical Engineers (ASME), 2021)Relative to the rotor overspeed compliance governed by civil aviation airworthiness regulation, nowadays the Area-Average Stress method is commonly used approach. However, in order to effectively apply the Area-Average ... -
30 Years of Dry-Low-NOx Micromix Combustor Research for Hydrogen-Rich Fuels—An Overview of Past and Present Activities
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents an overview of the past and present of low-emission combustor research with hydrogen-rich fuels at Aachen University of Applied Sciences (AcUAS). In 1990, AcUAS started developing the dry-low-NOx Micromix ... -
Bayesian Machine Learning for the Prognosis of Combustion Instabilities From Noise
(The American Society of Mechanical Engineers (ASME), 2021)Experiments are performed on a turbulent swirling flame placed inside a vertical tube whose fundamental acoustic mode becomes unstable at higher powers and equivalence ratios. The power, equivalence ratio, fuel composition, ... -
Approximate Relations for Optimum Turbine Operating Parameters in Allam Cycle
(The American Society of Mechanical Engineers (ASME), 2021)This article explores the relations between the cycle performance and the main operating parameters of the Allam cycle with uncooled turbine through a simplified thermodynamic analysis. The cycle efficiency is maximized ... -
Particle Image Velocimetry in a High-Pressure Turbine Stage at Aerodynamically Engine Representative Conditions
(The American Society of Mechanical Engineers (ASME), 2021)Particle image velocimetry (PIV) is a well-established technique for determining the flow direction and velocity magnitude of complex flows. This paper presents a methodology for executing this nonintrusive measurement ...