Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 741-760 of 9564
-
Performance Characteristics of a Rotating Detonation Combustor Exiting Into a Pressurized Plenum to Simulate Gas Turbine Inlet
(The American Society of Mechanical Engineers (ASME), 2023)The present study aims to experimentally characterize the performance of a rotating detonation combustion (RDC) system integrated with a pressurized downstream plenum to simulate the high-pressure inlet conditions of ... -
High Throughflow StreamVane Swirl Distortion Generators: Design and Analysis
(The American Society of Mechanical Engineers (ASME), 2023)In recent years, the StreamVane technology has developed into a mature and streamlined process that can reproduce swirl distortion for ground-test evaluation of fan and compressor performance and durability. A StreamVane ... -
Validation of Rotating Detonation Combustor Computational Fluid Dynamics Simulations for Predicting Unsteady Supersonic–Subsonic Flow Field at the Exit
(The American Society of Mechanical Engineers (ASME), 2023)Rotating detonation combustors (RDCs) have gained increased interest for integration with power-generating gas turbines due to the potential to increase thermal efficiency. The unsteady flow field exiting the RDC is ... -
Computation of Isolated Periodic Solutions for Forced Response Blade-Tip/Casing Contact Problems
(The American Society of Mechanical Engineers (ASME), 2023)This article introduces a numerical procedure dedicated to the identification of isolated branches of solutions for nonlinear mechanical systems. Here, it is applied to a fan blade subject to rubbing interactions and ... -
The Impact of Oxidation-Induced Degradation on Materials Used in Hydrogen-Fired Microturbines
(The American Society of Mechanical Engineers (ASME), 2023)Hydrogen-fueled microturbines are being considered as part of the future green microgrid. However, the use of hydrogen as a fuel presents new challenges for selection and development of suitable high temperature materials ... -
Detailed Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine
(The American Society of Mechanical Engineers (ASME), 2023)Aviation is known to be one of the most significant contributors to air pollutants. This includes gaseous emissions, like carbon dioxide (CO2) and nitrogen oxides (NOx), and also particulate matter (PM), especially in the ... -
Experimental and Computational Heat Transfer Study of sCO2 Single-Jet Impingement
(The American Society of Mechanical Engineers (ASME), 2023)This study experimentally and computationally investigates the heat transfer capability of supercritical carbon dioxide (sCO2) single jet impingement. The evaluated jet Reynolds number range is between 80,000 and 600,000, ... -
Effect of Reduced Oil Flow Rate on the Performance of a Load on Pad Journal Bearing: Flooded Versus Evacuated Conditions
(The American Society of Mechanical Engineers (ASME), 2023)Means to decrease the energy consumption of tilting pad journal bearings (TPJBs) without affecting their performance and structural integrity are mandatory in a cost efficient operation. Reducing the lubricant flow supplied ... -
Rigid Mode Vibration Control for 250 HP Air Compressor System With Integrated Hybrid Air-Foil Magnetic Thrust Bearing (i-HFMTB)
(The American Society of Mechanical Engineers (ASME), 2023)This study aims to verify the effectiveness of the 250 HP class compressor system to which the integrated hybrid air-foil magnetic thrust bearing (i-HFMTB) proposed in (Ha et al., 2023, “Integrated Hybrid Air Foil-Magnetic ... -
On the Flow Physics During the Transition of a Variable Pitch Fan From Nominal Operation to Reverse Thrust Mode
(The American Society of Mechanical Engineers (ASME), 2023)The flow field during the transition of variable pitch fans (VPFs) from nominal operation to reverse thrust mode at typical “Approach Idle” engine power setting and aircraft touchdown speed of 140 knots is described in ... -
Axial Compressor Map Generation Leveraging Autonomous Self-Training Artificial Intelligence. Phase 2
(The American Society of Mechanical Engineers (ASME), 2024)This paper discusses a study performed by SoftInWay as part of a Phase II SBIR project funded by NASA. In contrast with the Phase I project (Burlaka and Moroz, 2023, “Axial Compressor Map Generation Leveraging Autonomous ... -
The Hybrid Pathway to Flexible Power Turbines, Part I: Novel Autoencoder Methods for the Automated Optimization of Thermal Probes and Fast Sparse Data Reconstruction, Enabling Real-Time Thermal Analysis
(The American Society of Mechanical Engineers (ASME), 2023)The global drive toward renewable energy is imposing challenging operating requirements on power turbines. Flexible load-leveling applications must accept more frequent and demanding start-stop cycles. Full transient ... -
Preliminary Wear Investigations With Pressure Actuated Leaf Seals for Superheated Steam Turbine Application
(The American Society of Mechanical Engineers (ASME), 2023)Pressure actuated leaf seals (PALS) are a promising technology for the modern load-follow operation of power plants and turbines. Their strength lies in their radial adaptivity, which enables a significantly smaller radial ... -
Sensitivity Analysis of Transient Forced Response of Mistuned Bladed Disks Under Complex Excitation and Varying Rotation Speed
(The American Society of Mechanical Engineers (ASME), 2023)During accelerations and decelerations of gas-turbine engines, the transient vibration effects in bladed disk vibration become significant and the transient response needs to be efficiently and accurately assessed. This ... -
Options for Improving Performance of Additively Manufactured Nickel-Base Superalloys for Gas Turbine Applications
(The American Society of Mechanical Engineers (ASME), 2023)Additive manufacturing (AM) has been increasingly used for gas turbine (GT) components over the last decade. Many different components can be successfully designed, printed, and used in the gas turbine. However, there still ... -
Leakage and Rotordynamic Force Coefficients of a Labyrinth Seal and a Pocket Damper Seal Operating With Wet Gas
(The American Society of Mechanical Engineers (ASME), 2023)Subsea centrifugal compressors commonly using labyrinth seals (LS) and pocket damper seals (PDS) must withstand the flow of oil in gas mixtures with a liquid volume fraction (LVF) up to 5%. This paper presents experimental ... -
Comparison of the Flame Dynamics of a Liquid-Fueled Swirl-Stabilized Combustor for Different Degrees of Fuel-Air Premixing
(The American Society of Mechanical Engineers (ASME), 2023)This study investigates the flame dynamics of lean premixed kerosene combustion for two different degrees of fuel–air premixing using a swirl stabilized burner with an axially movable twin fluid fuel injection nozzle. ... -
Characterization of Spray Field for Water-Emulsified Diesel Using a Pressure Swirl Atomizer Under a Nonreacting Environment
(The American Society of Mechanical Engineers (ASME), 2023)Employing a mixture or an emulsion of water and diesel fuel is considered a way to reduce gas emissions such as NOx and soot in a gas turbine. This study presents detailed experimental results on the spray characteristics ... -
Performance Evaluation of Additively Manufactured and Hybrid Indexable Milling Tools in Machining of AISI4140+QT and Ti-6Al-4V
(The American Society of Mechanical Engineers (ASME), 2023)Additively manufactured (AM) cutting tools enable new design concepts in tool development concerning lightweight construction, damping behavior, and internal cutting fluid supply. So far, the impact of the layer-by-layer ... -
Structure and NOx Emissions of Stratified Hydrogen-Air Flames Stabilized on a Coaxial Injector
(The American Society of Mechanical Engineers (ASME), 2023)In recent years, the need for low-carbon power has seen hydrogen emerge as a potential fuel to replace conventional hydrocarbons in combustion to limit CO2 emissions in several sectors, including aeronautics. The challenges ...