Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 921-940 of 9564
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Evaluating the Aerodynamic Damping At Shock Wave Boundary Layer Interacting Flow Conditions With Harmonic Balance
(The American Society of Mechanical Engineers (ASME), 2022)The aerodynamic damping of a stator vane located in a rear stage of a high pressure compressor is evaluated at transonic flow conditions by numerical means. The results of a solution method based on temporal linearization ... -
Computational Fluid Dynamics Modeling of Low Temperature Ignition Processes From a Nanosecond Pulsed Discharge at Quiescent Conditions
(The American Society of Mechanical Engineers (ASME), 2022)Recent interest in nonequilibrium plasma discharges as sources of ignition for the automotive industry has not yet been accompanied by the availability of dedicated models to perform this task in computational fluid dynamics ... -
Fluid Dynamics of Turbine Rim Seal Structures: A Physical Interpretation Using URANS
(The American Society of Mechanical Engineers (ASME), 2022)Unsteady Reynolds-averaged Navier–Stokes modeling (URANS) is a valuable and cost-effective tool for computational fluid dynamics (CFD), including the investigation of mainstream–cavity interaction in turbines. Despite the ... -
Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Centrifugal compressors have a critical impact on the performance of a jet engine and can be made out of aluminum, steel, or titanium alloy. However, if made out of Ti-6Al-4V, it would be more lightweight than if steel ... -
Real Time Micro Gas Turbines Performance Assessment Tool: Comprehensive Transient Behavior Prediction With Computationally Effective Techniques
(The American Society of Mechanical Engineers (ASME), 2022)Conventional centralized power generation is increasingly transforming into a more distributed structure. The periodic power production that is created by the renewable production unit generates the need for small-scale ... -
Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator
(The American Society of Mechanical Engineers (ASME), 2022)This paper reports and compares the experimental results of leakage and dynamic force coefficients for two liquid annular pressure seals, one having a smooth-rotor/circumferentially grooved stator (SR/GS), the other one ... -
The Effects of High Centrifugal Acceleration on Bluff-Body Stabilized Premixed Flames
(The American Society of Mechanical Engineers (ASME), 2022)An experimental study is conducted on bluff-body stabilized premixed flames in a curved, square cross section duct. High flow velocities coupled with a small radius of curvature of the duct induce high centrifugal acceleration ... -
A Hybrid, Runtime Coupled Incompressible CFD-CAA Method for Analysis of Thermoacoustic Instabilities
(The American Society of Mechanical Engineers (ASME), 2022)Thermoacoustic instabilities in gas turbine engines are of increasing interest for design of future low-emission technology combustors. Numerical methods used to predict thermoacoustic instabilities often employ either ... -
Design Methodology and Mission Assessment of Parallel Hybrid Electric Propulsion Systems
(The American Society of Mechanical Engineers (ASME), 2022)An integrated engine cycle design methodology and mission assessment for parallel hybrid electric propulsion architectures are presented in this paper. The aircraft case study considered is inspired by Fokker 100, boosted ... -
A Methodology for a Coupled Structural–Computational Fluid Dynamics Analysis of Compressor Rotor Blades Subjected to Ice Impact With Uncertain Impactor Parameters
(The American Society of Mechanical Engineers (ASME), 2022)A method for a coupled structural–computational fluid dynamics (CFD) analysis of a compressor rotor blade subjected to an ice impact scenario is investigated to assess the impact related blade deformations from a structural ... -
System-Level Assessment of a Partially Distributed Hybrid Electric Propulsion System
(The American Society of Mechanical Engineers (ASME), 2023)Hybrid electric propulsion system-based aircraft designs are paving the path toward a future greener aviation sector and thus, have been the major focus of the aeronautical community. The fuel efficiency improvement ... -
The Interaction of Main Stream Flow and Cavity Flows in Turbine Center Frames and Turbine Vane Frames
(The American Society of Mechanical Engineers (ASME), 2022)This paper focuses on the interaction between the last high-pressure turbine (HPT) stage purge flows and the intermediate turbine duct (ITD) in modern turbofan engines. Two state-of-the-art ITD concepts are analyzed in ... -
Novel Unmanned Aircraft System Propeller Design—Part 1: Using an Unloaded Tip to Reduce Power Requirements and Lower Generated Sound Levels for Propellers Designed for Minimum Induced Drag
(The American Society of Mechanical Engineers (ASME), 2022)Today, over 500 eVTOL vehicles are being developed for everything from Urban Air Mobility to package delivery. In addition, unmanned aircraft systems (UASs) are used in a variety of applications to include intelligence, ... -
High-Pressure Laminar Flame Speeds and Markstein Lengths of Syngas Flames Diluted in Carbon Dioxide and Helium
(The American Society of Mechanical Engineers (ASME), 2022)New laminar flame speed and burned-gas Markstein length data for H2–CO–O2–CO2–He mixtures have been measured from spherically expanding flames. Experiments were conducted at 10 atm and room temperature for H2:CO ratios ... -
Stabilization of Low-NOx Hydrogen Flames on a Dual-Swirl Coaxial Injector
(The American Society of Mechanical Engineers (ASME), 2022)Hydrogen-fueled carbon-free energy is a growing prospect for the future of several industries, including the aeronautical and energy generation sectors. However, the transition to hydrogen comes with several challenges: ... -
Modal Identification of Bladed Disks by Time–Frequency Analysis of the Nonsynchronous Response
(The American Society of Mechanical Engineers (ASME), 2022)In some circumstances, it is impossible to exploit resonance crossings to identify the modal properties of rotor disks. In these cases, the identification process must rely on nonsynchronous vibrations and becomes challenging ... -
Aerodynamic Damping Predictions During Compressor Surge: A Numerical Comparison Between a Half and Full Transient Approach
(The American Society of Mechanical Engineers (ASME), 2022)The prediction of the aerodynamic damping during compressor surge is a challenging task, because the flow is continuously evolving along the four surge cycle phases: pressurization (PR), flow-breakdown (FB), reversed flow ... -
Synthesis of Methanol From a Chemical Looping Syngas for the Decarbonization of the Power Sector
(The American Society of Mechanical Engineers (ASME), 2022)One promising pathway for carbon capture and utilization is represented by the coupling of chemical looping cycles with liquid fuel synthesis processes. Methanol is an interesting fuel for gas turbines engines, due to its ... -
A Comparative Study of Crystal Viscoplastic Modeling of Directionally Solidified Nickel-Base Superalloys
(The American Society of Mechanical Engineers (ASME), 2022)Nickel-base superalloys (NBSAs) are a group of materials that are used in high-temperature applications. This work primarily focuses on directionally solidified (DS) NBSAs. Directionally solidified materials are comprised ... -
Nonlinear Damper-Blade Coupling Calculations Reduced to Essentials
(The American Society of Mechanical Engineers (ASME), 2022)To improve the numerical efficiency of the nonlinear calculations required for the dynamic response of damped turbine blades, the authors recently introduced the platform centered reduction (PCR) method which represents ...