Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 801-820 of 9564
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Experimental Research on Flow Instability Mechanism of a Highly Loaded Axial Compressor
(The American Society of Mechanical Engineers (ASME), 7/27/2023 )The performance and stable operating range of compressors are critical for the efficient operation of various turbomachinery systems. To reveal the flow instability mechanism of a high-speed and high-loaded compressor, a ... -
Experimental Analysis of the Leakage Characteristics of Three Types of Annular Segmented Seals
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )The present paper presents an experimental analysis of the leakage characteristics of three kinds of segmented seals. The segments of the first seal have smooth pads while the second seal has pads with pockets. The pads ... -
Numerical Modeling and Analysis of Energy-Assisted Compression Ignition of Varying Cetane Number Jet Fuels for High-Altitude Operation
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )Computational fluid dynamics (CFD) simulations are performed to study the potential of energy-assisted compression ignition (EACI) strategy for enabling ignition and enhancing combustion of different cetane number jet fuels ... -
A Design Approach of a Dedicated Exhaust-Gas Recirculation-System for a Naturally Aspirated Gas Engine—From One-Dimensional Engine Process Simulation and Design of Experiments Up to the Experimental Validation
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )This work presents a systematic approach proceeding from the engine process simulation (one-dimensional (1D)-computational fluid dynamics (CFD)) and design of experiments (DoE) up to the experimental validation to build a ... -
Numerical Investigation of a Heavy-Duty Compression Ignition Engine Converted to Ammonia Spark-Ignition Operation
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )Global decarbonization requires the increased use of zero-carbon fuels. Compared to hydrogen, ammonia is easier to store, transport, and produce. In addition, products of complete combustion of ammonia are water and nitrogen. ... -
Experimental Study on Spark Assisted and Hot Surface Assisted Compression Ignition (SACI, HSACI) in a Naturally Aspirated Single-Cylinder Gas Engine
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )Spark assisted compression ignition (SACI) represents an efficacious technique to extend the operating range and control combustion timing in homogeneous charge compression ignition (HCCI) engines. Recently, a hot surface ... -
Evaluation of Spray and Combustion Models for Simulating Dilute Combustion in a Direct-Injection Spark-Ignition Engine
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )Dilute combustion in spark-ignition engines has the potential to improve thermal efficiency by mitigating knock and by reducing throttling and wall heat losses. However, ignition and combustion processes can become unstable ... -
Effects of High Rotational Speed on Leakage and Windage Heating of Staggered Labyrinth Seals With Smooth and Honeycomb Lands
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )Being an important component of aero-engines, the labyrinth seal has always been the focus of research for leakage characteristics. Rotation is usually neglected or taken for minimal effect on seal leakage in previous ... -
Deterministic Optimization Approach for High-Performance Externally Fired Biomass-Fueled Micro-Gas Turbines
(The American Society of Mechanical Engineers (ASME), 7/19/2023 )This work focuses on a dual-objective optimization of a 100 kWe externally fired micro-gas turbine utilizing the producer gas from a biomass gasifier. Although externally fired micro-gas turbines are convenient for resolving ... -
Impact of Ignition Assistant on Combustion of Cetane 30 and 35 Jet-Fuel Blends in a Compression-Ignition Engine at Moderate Load and Speed
(The American Society of Mechanical Engineers (ASME), 5/25/2023 )This study investigates the use of a commercial-off-the-shelf (COTS) ceramic glow-plug to assist ignition of jet fuel blends with cetane numbers of 30 and 35, below the minimum cetane number of 40 for #2 diesel. Experiments ... -
Study of Injector Geometry and Parcel Injection Location on Spray Simulation of the Engine Combustion Network Spray G Injector
(The American Society of Mechanical Engineers (ASME), 5/25/2023 )Parcel-based simulations are the most common method to simulate fuel sprays, especially for reacting conditions, due to their lower computational cost compared to more highly resolved simulations. It is important, however, ... -
Lessons Learned Toward Estimating the High-Pressure Turbine Inlet Temperature Profile Using Measurements Acquired at the High-Pressure Turbine Exit
(The American Society of Mechanical Engineers (ASME), 5/25/2023 )To achieve higher thermal efficiency, gas turbines operate at increasingly higher turbine inlet temperatures, leading to the need for advanced cooling methods such as film cooling, impingement cooling, and passage cooling ... -
Evaluating the Operating Parameters of a Compression Ignition Engine Fueled With Waste Cooking Oil—Diesel Blends Using Artificial Neural Network and Ensemble Methods
(The American Society of Mechanical Engineers (ASME), 5/25/2023 )Fossil fuels being the primary source of energy for industrial and power sectors are being consumed at an alarming rate. There is a dire need to search for alternative fuels and optimize the performance parameters of ... -
Fully Coupled Analysis of Flutter Induced Limit Cycles: Frequency Versus Time Domain Methods
(The American Society of Mechanical Engineers (ASME), 5/25/2023 )To save resources and reduce emissions, it is crucial to reduce weight of aircraft engines and further increase aerodynamic efficiency of gas and steam turbines. For turbine blades, these goals often lead to flutter. Thus, ... -
Application of an Automatic Mesh Convergence Procedure for the Large Eddy Simulation of a Multipoint Injection System
(The American Society of Mechanical Engineers (ASME), 2/15/2023 )Lean combustion is an attractive alternative to limit pollutants levels in order to meet the imposed limitations for the next generation of civil aero-engines. However, its implementation involves important technological ... -
Modal Identification for Integrally Bladed Rotors Under Traveling Wave Excitation
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )The safety of a fielded integrally bladed rotor (IBR) is often assessed through vibration testing. Responses due to various types of excitation are measured and processed and can be inputs to follow-on analyses, such as ... -
Dynamic Characteristics of Rotor-Squeeze Film Damper-Support System Excited by Base Harmonic Excitations Using MHB-AFT Method
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )When operating at high speed, aeroengines mounted on the aircrafts also perform complicated maneuvering flights along with the aircrafts. The engine rotor systems will undergo forced motions excited by base movements and ... -
An Upgraded Chemical Kinetic Mechanism for Iso-Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )Iso-octane is widely recognized as a prominent candidate to represent the oxidation of iso-alkanes within jet fuel and gasoline surrogates. This work evaluated a chemical kinetic mechanism for iso-octane focusing on the ... -
Creep Analysis and Microstructural Evaluation of a Novel Additively Manufactured Nickel-Base Superalloy (ABD®-900AM)
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )Nickel-base superalloys containing 30 to 50% gamma prime (γ') volume fraction are typically used in hot section components (e.g., guide vanes or blades) for power generating gas turbines, and suitable time-dependent ... -
Multi-Objective Optimization of Economy, Safety and Emissions for the Startup Scheduling of a Steam Turbine
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )With the rapid development of renewable energy, traditional power generation such as combined cycle unit needs to startup or change load quickly to balance the variability brought by renewable resources. In the combined ...