Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 761-780 of 9564
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Intermittency of Flame Structure and Thermo-Acoustic Behavior in a Staged Multipoint Injector Using Liquid Fuel
(The American Society of Mechanical Engineers (ASME), 2023)This study investigates the impact of the staging factor, the ratio between the fuel injected through the pilot stage and the multipoint injection, on the flame dynamic. The BIMER combustor is an atmospheric pressure rig ... -
Virginia Tech Optical Inlet Sensor for Particle Detection: Rolls Royce M250 Turboshaft Demonstration
(The American Society of Mechanical Engineers (ASME), 2023)Propulsion systems are exposed to environmental ingestion hazards that can cause significant damage and decrease performance. Particles are ingested in a wide range of flight environments that can cause immediate engine ... -
GLDAN: Global and Local Domain Adaptation Network for Cross-Wind Turbine Fault Diagnosis
(The American Society of Mechanical Engineers (ASME), 2023)Operating under harsh conditions and exposed to fluctuating loads for extended periods, wind turbines experience a heightened vulnerability in their key components. Early fault detection is crucial to enhance the reliability ... -
Effect of Unsteady Fan-Intake Interaction on Short Intake Design
(The American Society of Mechanical Engineers (ASME), 2023)The next generation of ultrahigh bypass ratio civil aero-engines promises notable engine cycle benefits. However, these benefits can be significantly eroded by a possible increase in nacelle weight and drag due to the ... -
Best Practices for Electricity Generators and Energy Storage Optimal Dispatch Problems
(The American Society of Mechanical Engineers (ASME), 2023)The growing share of renewable energy sources in the energy mix and the liberalization of electricity markets has drastically affected the operation of electricity generators. Especially, in the last decade, fossil fuel-based ... -
Functionalization of All-Oxide Ceramic Matrix Composites Elements Using Three-Dimensional Braiding and Pressure Slip Casting for Composite Processing: Approaches to Reduce the Filter Effect of Dense Reinforcement Textiles
(The American Society of Mechanical Engineers (ASME), 2023)A key element for the transition to sustainable energy lies in the transformation of the power plant fleet, which is dominated by fossil fuels, toward sustainable energy production from renewable energy sources. An increase ... -
Reduced Order Model of Nonlinear Structures for Turbomachinery Aeroelasticity
(The American Society of Mechanical Engineers (ASME), 2023)This work concerns the numerical modeling of geometric nonlinear vibrations of slender structures in rotation using an original reduced order model based on the use of dual modes along with the implicit condensation method. ... -
Ignition of Various Lubricating Oil Compositions Using a Shock Tube
(The American Society of Mechanical Engineers (ASME), 2023)With new restrictions imposed on gas turbine efficiencies and power outputs, lubricating oils are used at higher temperatures and harsher conditions leading to potential, unintended combustion. To establish an understanding ... -
Analysis of High-Frequency Dynamics of a Reacting Jet in Crossflow Based on Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2023)Distributed combustion systems have shown the potential to reduce emissions as well as increase load and fuel flexibility. A characteristic feature of such systems is a reacting jet in crossflow, which exhibits complex ... -
Multi-Objective Experimental Combustor Development Using Surrogate Model-Based Optimization
(The American Society of Mechanical Engineers (ASME), 2023)The majority of premixed industrial gas turbine combustion systems feature two or more separately controlled fuel lines. Every additional fuel line improves the operational flexibility but increases the complexity of the ... -
An Algorithm for Starved Lubricated Journal Bearings With Optionally Locked Lube Oil Feed Grooves
(The American Society of Mechanical Engineers (ASME), 2023)Starved lubrication occurs intentionally or unconsciously in many journal bearing applications. However, the determination of its concrete distribution in a journal bearing is rather complex as the different lube oil feed ... -
Determination of Cetane Numbers Via Chemical Kinetic Mechanism
(The American Society of Mechanical Engineers (ASME), 2023)Minimizing global warming is a major task of todays' society. For air transport, sustainable aviation fuels (SAF) produced from renewable sources are a promising key solution. While electric flight is intriguing for short ... -
Investigation of Rear Blisk Drum Dynamics Under Consideration of Multi-Stage Coupling
(The American Society of Mechanical Engineers (ASME), 2023)The analysis of the structural dynamics of multistage cyclic structures as linked components is required to model the interstage coupling. In turbomachinery, this can result in a collaboration between different compressor ... -
Multidisciplinary Optimization of Thermodynamic Cycles for Large-Scale Heat Pumps With Simultaneous Component Design
(The American Society of Mechanical Engineers (ASME), 2023)The performance of high temperature heat pumps (HTHPs) is highly dependent on the efficiency of its main components, which need to be optimally matched especially in closed cycles. The design process is therefore a challenging ... -
Combined Joule-Humphrey-Recuperator Cycle: Performance and Parametric Analysis Evaluation Toward More Efficient Air Transportation
(The American Society of Mechanical Engineers (ASME), 2023)A three-stream combined Joule-Humphrey cycle that employs a heat recovery stream to function as a recuperator is presented. Based on an in-house developed thermodynamic performance tool, the operation of a modified dual-shaft ... -
A Study on Quantities Driving Maintenance, Repair, and Overhaul for Hybrid-Electric Aeroengines
(The American Society of Mechanical Engineers (ASME), 2023)Hybrid-electric propulsion for commercial aircraft is currently a key industry interest. Consequently, publications on its design and performance estimation are manifold. However, models addressing characteristics of ... -
Turbulent Flame Speed and Flame Characteristics of Lean Premixed H2-CH4 Flames at Moderate Pressure Levels
(The American Society of Mechanical Engineers (ASME), 2023)Carbon dioxide emissions in gas turbine power generation can be reduced by adding an increasing amount of hydrogen to the existing natural gas-fueled combustion systems. To enable safe operation, more insight on how H2 ... -
Dynamic Forced Performance of an O-Rings Sealed Squeeze Film Damper Lubricated With a Low Supply Pressure and a Simple Method to Quantify Air Ingestion
(The American Society of Mechanical Engineers (ASME), 2023)Contemporary squeeze film dampers (SFDs) in air-breathing engines are short in length to limit weight and part count and lubricated with a low feed pressure to reduce oil storage and pumping power. In SFDs, O-rings (ORs) ... -
The Effect of Ignition Procedure on Flashback of Hydrogen-Enriched Flames
(The American Society of Mechanical Engineers (ASME), 2023)The impact of different ignition sequences on the ignition dynamics of CH4-H2 flames in a bluff body burner is investigated at atmospheric conditions. Experiments are performed over a wide range of operating conditions ... -
Assessing Transfer Matrix Models and Measurements Using Acoustic Energy Conservation Principles
(The American Society of Mechanical Engineers (ASME), 2023)Acoustic transfer matrices are widely used in the analysis of combustion dynamics of gas turbines. The reliability of the analysis thus depends on the quality of the determination of the transfer matrices of the individual ...