Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 601-620 of 9564
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Analysis of In-Cylinder Flow in a Small-Bore Spark-Ignition Engine Using Computational Fluid Dynamics Simulations and Zero-Dimensional-Based Modeling
(The American Society of Mechanical Engineers (ASME), 2024)The evolution of in-cylinder flow involves large- and small-scale structures during the intake and compression strokes, significantly influencing the fuel–air mixing and combustion processes. Extensive research has been ... -
The Effect of Swirl Number on Lean Blow Out Limits of Lean Direct Injection Combustors
(The American Society of Mechanical Engineers (ASME), 2024)This is the first study where a single variable sweep of SN is conducted to assess its impact on lean blowout limits (LBO) in a liquid-fueled lean direct injection (LDI) combustor. This study uses a scaled NASA SV-LDI ... -
A Multistage Nonlinear Method for Aeroengine Health Parameter Estimation Based on Adjacent Operating Points
(The American Society of Mechanical Engineers (ASME), 2024)Health parameter estimation is the core of engine gas path analysis (GPA), which is widely adopted for engine safety improvement, as well as for operation and maintenance cost reduction. The major challenge of GPA lies in ... -
Vibration Characteristics Investigation of Hard-Coated Mistuned Blisk With Multipackets by Lumped Parameter Model
(The American Society of Mechanical Engineers (ASME), 2024)To improve the performance and reduce the vibration of the mistuned blisk, a novel approach combining hard-coating and multipackets is presented. First, the dynamical models of the blisk without hard-coating and multipackets, ... -
Multidisciplinary Design Methodology for Micro-Gas-Turbines—Part II: System Analysis and Optimization
(The American Society of Mechanical Engineers (ASME), 2024)Owing to their high specific energy capabilities, ultramicrogas turbines (UMGT) are a high-potential technology to provide portable electric power supply for applications with demand of less than 1 kW. UMGT conceptual ... -
Multidisciplinary Design Methodology for Micro-Gas-Turbines—Part I: Reduced Order Component Design and Modeling
(The American Society of Mechanical Engineers (ASME), 2024)Ultramicrogas turbines (UMGTs) for electric power generation up to 1 kW are a viable replacement technology for lithium batteries in drones due to their high energy density. Previous research has shown that small-scale ... -
Evaluation of Extreme Value Predictions for Unsteady Flow Distortion of Aero-Engine Intakes
(The American Society of Mechanical Engineers (ASME), 2024)Unsteady flow distortion is of interest for the development of air-breathing propulsion systems. Stochastic fluctuations can generate incompatibilities between intakes and aero-engines. Observing the extreme flow distortion ... -
Cooled Spray Technology for Particulate Reduction in a Heavy-Duty Engine
(The American Society of Mechanical Engineers (ASME), 2024)Cooled spray (CS) technology passively reduces particulate matter (PM) emissions from diesel engines compared to non-CS-equipped diesel engines. CS inserts are mounted near the injector nozzle and control mixing so that ... -
Development and Evaluation of Generic Test Pieces for Creep Property Assessment of Laser Powder Bed Fusion Components
(The American Society of Mechanical Engineers (ASME), 2024)Metal laser powder bed fusion (PBF-LB/M) allows for high degrees of design freedom and the manufacture of high-temperature Ni-based materials, such as IN738LC. The PBF-LB/M microstructure is dependent on several factors, ... -
Modeling Ammonia-Hydrogen-Air Combustion and Emission Characteristics of a Generic Swirl Burner
(The American Society of Mechanical Engineers (ASME), 2024)The combustion process of both pure NH3 and a NH3/H2 fuel blends is here analyzed using two kinetics processors, i.e., Chemkin-Pro-and CANTERA: detailed kinetic mechanisms have been tested and compared in terms of laminar ... -
Oxygen Storage Incorporated Into Net Power and the Allam–Fetvedt Oxy-Fuel sCO2 Power Cycle—Techno-Economic Analysis
(The American Society of Mechanical Engineers (ASME), 2024)With the planned future reliance on variable renewable energy, the ability to store energy for prolonged time periods will be required to reduce the disruption of market fluctuations. This paper presents a method to analyze ... -
Novel Combustion Instability Diagnosis Method With Upstream Pulsation of Repetitive Laser-Induced Plasmas
(The American Society of Mechanical Engineers (ASME), 2024)In this experimental study, we are presenting the ability of laser-induced plasmas with successive pulsation to identify combustion instabilities (CI) of a premixed lab-scale combustor. An acoustic disturbance equivalent ... -
Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents the experimental leakage and rotordynamic performance for a liquid smooth annular seal operating in the transition regime. The test conditions include pressure differentials up to 64 bars with 1∼2 bar ... -
Experimental Study of the Impact of Ethanol Content on Partially Premixed Combustion With Ethanol-Gasoline Blends
(The American Society of Mechanical Engineers (ASME), 2024)As ethanol production increases and the demand for gasoline in spark ignition engines decreases over the next few decades, the use of these fuels in compression ignition systems is expected to increase. This raises the ... -
Comprehensive Flow Path Design Method for the Adaptive Cycle Engine Considering the Coupling Relation of Multiple Components
(The American Society of Mechanical Engineers (ASME), 2024)The adaptive cycle engine (ACE) has multiple coupled components on the same spool and complex bypass system, which makes it have more complex intercomponent coupling relation and hard to coordinate in the flow path design. ... -
Influence of Gap Shape on Flow Characteristics of Highly Loaded Compressor Tandem Cascades
(The American Society of Mechanical Engineers (ASME), 2024)Gap shape is an important factor affecting the tandem cascade performance. This paper uses the gap expansion angle (Kb−b) to define gap shape and studies the effect of Kb−b on the two-dimensional flow field and flow ... -
Numerical Investigation of a Hydrogen–Air Flame for NOx Prediction
(The American Society of Mechanical Engineers (ASME), 2024)Sustainable aviation fuels are a major candidate to reduce pollutant emissions in future aeronautical engines. Recently, the use of hydrogen as a fuel has gained a high interest partly because its combustion is free from ... -
Estimation of Piston Surface Temperature During Engine Transient Operation for Emissions Reduction
(The American Society of Mechanical Engineers (ASME), 2024)Piston surface temperature is an important factor in the reduction of harmful emissions in modern gasoline direct injection (GDI) engines. In transient operation, the piston surface temperature can change rapidly, increasing ... -
Operational Strategies of Two-Spool Micro Gas Turbine With Alternative Fuels: A Performance Assessment
(The American Society of Mechanical Engineers (ASME), 2024)Micro gas turbines (mGT) have not yet succeeded in conquering the small-scale combined heat and power (CHP) market. One reason is that their electrical efficiency is not high enough to maintain a cost-effective operation. ... -
Thrust Rebalance to Extend Engine Time On-Wing With Consideration of Engine Degradation and Creep Life Consumption
(The American Society of Mechanical Engineers (ASME), 2024)Over the years, airlines have consistently attempted to lower their operational costs and improve aircraft availability by applying various technologies. Engine maintenance expenses are one of the most substantial costs ...