Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 861-880 of 9564
-
Investigation of Soot in a Model CFM56 Atmospheric Combustor Using In-Situ Laser-Induced Incandescence Calibration
(The American Society of Mechanical Engineers (ASME), 2023)In this work, we investigate qualitative backlight imaging-based spray characteristics and laser-induced incandescence (LII) based quantitative soot volume fraction (SVF) in a CFM56 model combustor with a simplex nozzle ... -
Inter-Stage Pressure Drop of Multi-Stage Brush Seal With Differentiated Structure
(The American Society of Mechanical Engineers (ASME), 2023)Uneven pressure drops among stages of multistage brush seal (MBS) leads to early failure of single-stage seal units, which directly affects service life of the seal used in aeroengines, gas turbines, and steam turbines. ... -
Mixture Distribution in Spark Ignited Port Fuel Injection Engines: A Review
(The American Society of Mechanical Engineers (ASME), 2023)Modern gasoline engines have to meet increased stringent emission requirements along with the demand of a better fuel economy. This has led to a transition from carburetor to port fuel injection (PFI) mode in developing ... -
Measurement of Inertial and Acoustic Waves in a Turbine Chute Rim Seal Cavity
(The American Society of Mechanical Engineers (ASME), 2023)A chute rim seal cavity has been instrumented with time-resolved and time-averaged pressure transducers as well as a gas concentration measurement system at the Oxford Rotor Facility. The unsteady pressure transducers were ... -
Combustion Variability Monitoring in Engines Using High-Speed Exhaust Temperature and Pressure Measurements
(The American Society of Mechanical Engineers (ASME), 2023)The diagnostic merits of high-speed (HS) exhaust gas temperature and pressure measurements for indexing engine stability and identifying abnormal combustion cycles are explored through experimental investigations on a low ... -
Experimental Investigation of Combustion Dynamics in a High-Pressure Liquid-Fueled Swirl Combustor
(The American Society of Mechanical Engineers (ASME), 2023)In this paper, we present combustor acoustics in a high-pressure liquid-fueled rich burn—quick quench—lean burn (RQL) styled swirl combustor with two separate fuel circuits. The fuel circuits are the primary (which has a ... -
Characterization of Properties of Laser Powder Bed Fusion Three-Dimensional-Printed Inconel 718 for Centrifugal Turbomachinery Applications
(The American Society of Mechanical Engineers (ASME), 2023)This paper presents the results of a comprehensive effort to characterize the properties of Inconel 718 produced by a form of laser powder bed fusion (LPBF) additive manufacturing (AM) or three-dimensional (3D)-printing, ... -
Development of a New Loss Model for Turbomachinery Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2023)The preliminary design of labyrinth seals requires fast and accurate estimate of the leakage flow. While the conventional bulk flow models can quickly predict labyrinth seal discharge characteristics, they lack the accuracy ... -
Investigations on the Splitter Structure to Improve the Aerodynamic Performance of Gas Turbine Exhaust Diffuser at Different Swirl Angles
(The American Society of Mechanical Engineers (ASME), 2023)To weaken the flow separation in the exhaust diffuser under real operating conditions and increase the static pressure recovery coefficient of the exhaust diffuser, an exhaust diffuser structure with splitters was proposed. ... -
Experimental Study of Effect of Injection Timing on Port Fuel Injection Gasoline, Port Fuel Injection Compressed Natural Gas, and Direct Injection Compressed Natural Gas Engine Performance, Combustion, and Emissions Characteristics
(The American Society of Mechanical Engineers (ASME), 2023)Compressed natural gas (CNG) has gained popularity due to its wide availability, higher efficiency, and lower emissions compared to gasoline. However, the lower flame speed characteristics of CNG with conventional port ... -
Convolutional Neural Network Denoising Auto-Encoders for Intelligent Aircraft Engine Gas Path Health Signal Noise Filtering
(The American Society of Mechanical Engineers (ASME), 2023)Removing noise from health signals is critical in gas path diagnostics of aircraft engines. An efficient noise filtering/denoising method should remove noise without using future data points, preserve important changes, ... -
Effect of a Reduced Oil Flow Rate on the Static and Dynamic Performance of a Tilting Pad Journal Bearing Running in Both the Flooded and Evacuated Conditions
(The American Society of Mechanical Engineers (ASME), 2023)The mechanical efficiency of rotating machinery improves as drag power losses in bearings reduce; hence, an operation mode that reduces the supplied flow brings immediate benefits. The paper presents measurements of the ... -
Stability Characteristics of an Actively Valved Resonant Pulse Combustor
(The American Society of Mechanical Engineers (ASME), 2023)Resonant pulse combustors, one of the deflagration-based pressure gain combustion devices, can significantly increase thermal efficiency in gas turbine engines. This experimental study investigates the stability characteristics ... -
Large Eddy Simulation of Gasoline Sprays in a Lagrangian–Eulerian Framework Using the High-Order Spectral Element Method
(The American Society of Mechanical Engineers (ASME), 2023)Predicting the spray evolution using simulations requires accurate modeling of the turbulent gas-phase flow field. In this study, the high-order spectral-element method (SEM), implemented in the code Nek5000, was used to ... -
Power and Hydrogen Co-Production in Flexible “Powdrogen” Plants
(The American Society of Mechanical Engineers (ASME), 2023)This study investigates the potential of “Powdrogen” plants for blue hydrogen and decarbonized electric power production, conceived to operate flexibly depending on the electricity price and to increase the capacity factor ... -
Numerical Investigation on the Leakage and Rotordynamic Characteristics for a Hole-Pattern Seal in Wet-Gas Conditions
(The American Society of Mechanical Engineers (ASME), 2023)For turbomachinery working in wet-gas conditions, liquid-phase fluid may worsen the rotordynamic characteristic of an annular seal, which induces a subsynchronous vibration problem and destabilizes the rotor-bearing system. ... -
Effects of Wobbe Index on the Combustion and Emission Characteristics of a Natural Gas/Diesel RCCI Engine
(The American Society of Mechanical Engineers (ASME), 2023)Due to energy shortage and environmental problems, the application of natural gas in internal combustion engine has attracted extensive attention. Therefore, diesel pilot ignition natural gas engine is a promising technology. ... -
Estimation of Dynamical Thermoacoustic Modes Using an Output Only Observer Kalman Filter-Based Identification Algorithm
(The American Society of Mechanical Engineers (ASME), 2023)Thermoacoustic instabilities have plagued the operation of gas turbine engines for years and significant research is being conducted in detecting and understanding them. In this paper, an output only identification technique ... -
Optimizing Internal Energy Streams in Micro Gas Turbines in Cogeneration toward Flexible Heat-to-Power Ratio—Global Thermodynamic Performance Assessment and Specific Case Studies
(The American Society of Mechanical Engineers (ASME), 2023)Although the simultaneous production of heat and power, the so-called combined heat and power (CHP), is from a thermodynamic point of view still the most efficient energy conversion method, cogeneration units have nowadays ... -
Mechanical Behavior of Variable Nozzle Guide Vane Systems Based on Full-Scale Testing
(The American Society of Mechanical Engineers (ASME), 2023)A full-scale test bench for the analysis of frictional and modal behavior of nozzle guide vanes (NGV) is an advanced tool enabling high design accuracy for these components equipped with an increasing number of turbo-expanders. ...