Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1721-1740 of 9564
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The Effect of Vanes and Blades on Ingress in Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents experimental and computational results using a 1.5-stage test rig designed to investigate the effects of ingress through a double radial overlap rim-seal. The effect of the vanes and blades on ingress ... -
Flow Instabilities in Gas Turbine Chute Seals
(The American Society of Mechanical Engineers (ASME), 2020)The ingress of hot annulus gas into stator–rotor cavities is an important topic to engine designers. Rim-seals reduce the pressurized purge required to protect highly stressed components. This paper describes an experimental ... -
Validation of a Numerical Quasi-One-Dimensional Model for Wave Rotor Turbines With Curved Channels
(The American Society of Mechanical Engineers (ASME), 2020)A wave rotor is a shock-driven pressure exchange device that, while relatively rarely studied or indeed, employed, offers significant potential efficiency gains in a variety of applications including refrigeration and gas ... -
A New Mistuning Identification Method Based on the Subset of Nominal System Modes Method
(The American Society of Mechanical Engineers (ASME), 2020)The mistuning problem of quasi-periodic structures has been the subject of numerous scientific investigations for more than 50 years. Researchers developed reduced-order models to reduce the computational costs of mistuning ... -
Design of Control Laws Based on Inverted Decoupling and Linear Matrix Inequality for a Turboprop Engine
(The American Society of Mechanical Engineers (ASME), 2020)This paper proposes a systematic approach to design control laws for a turboprop engine. The proposed approach includes interactions decoupling and control laws design based on linear matrix inequality (LMI). First, since ... -
Ignition Delay Times of Oxy-Syngas and Oxy-Methane in Supercritical CO2 Mixtures for Direct-Fired Cycles
(The American Society of Mechanical Engineers (ASME), 2020)The direct-fired supercritical CO2 (sCO2) cycles promise high efficiency and reduced emissions while enabling complete carbon capture. However, there is a severe lack of fundamental combustion kinetics knowledge required ... -
Multi-Wave Vibration Caused by Flutter Instability and Nonlinear Tip-Shroud Friction
(The American Society of Mechanical Engineers (ASME), 2020)Measurements revealed the contribution of multiple traveling waves to the flutter vibrations of bladed disks. Saturated flutter vibration, whether in this multi-wave or in its better-understood single-wave form, is a ... -
The Complete Performance Map of Gas Wave Ejector and Analysis on the Variation Laws and Limitation of Performance
(The American Society of Mechanical Engineers (ASME), 2020)The gas wave ejector (GWE) is an efficient gas wave equipment using pressure waves to realize energy exchange. In this paper, a theoretical analysis of the limitation of application range and the factors affecting the ... -
Preliminary Design of Small-Scale Supercritical CO2 Radial Inflow Turbines
(The American Society of Mechanical Engineers (ASME), 2020)In recent years, supercritical CO2 (sCO2) Brayton cycles have drawn the attention of researchers due to their high cycle efficiencies, compact turbomachinery, and environmental friendliness. For small-scale cycles, radial ... -
Effects of Double-Side Labyrinth Seals on Aerodynamic Performance in a Transonic Shrouded Turbine Stage
(The American Society of Mechanical Engineers (ASME), 2020)Labyrinth seals on both rotor casing and blade tip as an effective method to control the leakage flowrate of the shroud and improve aerodynamic performances in a transonic turbine stage are investigated in this study. ... -
Development and Validation of a General and Robust Methodology for the Detection and Classification of Gas Turbine Sensor Faults
(The American Society of Mechanical Engineers (ASME), 2020)Sensor fault detection and classification is a key challenge for machine monitoring and diagnostics, since raw data cleaning represents a key process in the gas turbine industry. To this end, this paper presents a comprehensive ... -
Blade Arrangement Optimization for Mistuned Bladed Disk Based on Gaussian Process Regression and Genetic Algorithm
(The American Society of Mechanical Engineers (ASME), 2020)Mistuning phenomena exist in the bladed disk due to the inevitable deviations among blades' properties, e.g., stiffness, mass, geometry, etc., leading to localization and response amplification. The dynamic performance of ... -
Comprehensive Performance Analysis of the Turbofan With a Multi-Annular Rotating Detonation Duct Burner
(The American Society of Mechanical Engineers (ASME), 2020)The performance analysis of mixed-exhaust turbofan engine with multi-annular rotating detonation duct burner (RDDB) is conducted for the first time, considering that the flow path of the bypass duct is ideal for a rotating ... -
Turbulent Reactive Flow Modeling in Engines: Simulating Engine Dynamics Using fearce
(The American Society of Mechanical Engineers (ASME), 2020)The Los Alamos turbulent reactive flow researchers, our modelers, and simulation code developers have succeeded in providing the engine research and development community an encompassing, robust, accurate, and easy-to-use ... -
Kinetics Modeling on NOx Emissions of a Syngas Turbine Combustor Using Rich-Burn, Quick-Mix, Lean-Burn Combustion Method
(The American Society of Mechanical Engineers (ASME), 2020)To avoid flashback issues of the high-H2 syngas fuel, current syngas turbines usually use nonpremixed combustors, which have high NOx emissions. A promising solution to this dilemma is rich-burn, quick-mix, lean-burn (RQL) ... -
Rotordynamic Characteristics Prediction for Hole-Pattern Seals Using Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2020)The experimental setup for a hole-pattern seal is modeled using computational fluid dynamics (CFD) and results compared with measured test data and bulk flow model (ISOTSEAL) predictions. The inlet swirl boundary condition ... -
Design Optimization of a Blended Blade and Endwall in a Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2020)The blended blade and endwall (BBEW) contouring technology can adjust the dihedral angle between suction surface and endwall, thus reducing corner separation in compressors. Generally, the design of BBEW relies on the ... -
Altitude Test Facility Humidity Control to Generate Defined Icing Conditions
(The American Society of Mechanical Engineers (ASME), 2020)In altitude test facility (ATF) operation, the requirements to control humidity to generate defined icing conditions are gaining more and more importance. In this context, the ability to predict humidity and condensation ... -
Ignition of Diesel Pilot Fuel in Dual-Fuel Engines
(American Society of Mechanical Engineers (ASME), 2019)Dual-fuel (DF) engines offer great fuel flexibility combined with low emissions in gas mode. The main source of energy in this mode is provided by gaseous fuel, while the diesel fuel acts only as an ignition source. For ... -
Characterization of the Effect of Exhaust Back Pressure on Crank Angle-Resolved Exhaust Exergy in a Diesel Engine
(American Society of Mechanical Engineers (ASME), 2019)To enable efficient exhaust waste energy recovery (WER), it is important to characterize the exergy available in engine exhaust flows. In a recent article (Mahabadipour et al., 2018, Appl. Energy, 216, pp. 31–44), the ...