Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2541-2560 of 9564
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Effect of Bolts on Flow and Heat Transfer in a Rotor–Stator Disk Cavity
(The American Society of Mechanical Engineers (ASME), 2017)Previous studies have indicated some differences between steady computational fluid dynamics (CFD) predictions of flow in a rotor–stator disk cavity with rotating bolts compared to measurements. Recently, time-dependent ... -
Rigid Mode Vibration Control and Dynamic Behavior of Hybrid Foil–Magnetic Bearing Turbo Blower
(The American Society of Mechanical Engineers (ASME), 2017)In this study, experimental and analytical analyses of the vibration stability of a 225 kW class turbo blower with a hybrid foil–magnetic bearing (HFMB) were performed. First, critical speed and unbalance vibration responses ... -
An Innovative Method for the Evaluation of Particle Deposition Accounting for Rotor/Stator Interaction
(The American Society of Mechanical Engineers (ASME), 2017)Solid particle ingestion is one of the principal degradation mechanisms in the compressor and turbine sections of gas turbines. In particular, in industrial applications, the microparticles not captured by the air filtration ... -
Rotordynamic Computational and Experimental Characterization of a Convergent Honeycomb Seal Tested With Negative Preswirl, High Pressure With Static Eccentricity and Angular Misalignment
(The American Society of Mechanical Engineers (ASME), 2017)Hole-pattern or honeycomb seals have been commonly used for many years in the Oil & Gas industry as damper seals for turbomachinery. The main motivation has been to introduce additional damping to improve the shaft ... -
Experimental Study of Effusion Cooling With Pressure-Sensitive Paint
(The American Society of Mechanical Engineers (ASME), 2017)Gas turbines overall efficiency enhancement requires further increasing of the firing temperature and decreasing of cooling flow usage. Multihole (or effusion, or full-coverage) film cooling is widely used for hot gas path ... -
Material Selection Issues for a Nozzle Guide Vane Against Service-Induced Failure
(The American Society of Mechanical Engineers (ASME), 2017)Nozzle guide vanes (NGV) of gas turbine engines are the first components to withstand the impingement of hot combustion gas and therefore often suffer thermal fatigue failures in service. A lifting analysis is performed ... -
Influence of Heat Transfer and Material Temperature on Combustion Instabilities in a Swirl Burner
(The American Society of Mechanical Engineers (ASME), 2017)The current work focuses on the large eddy simulation (LES) of combustion instability in a laboratory-scale swirl burner. Air and fuel are injected at ambient conditions. Heat conduction from the combustion chamber to the ... -
Transient Performance Analysis of an Industrial Gas Turbine Operating on Low-Calorific Fuels
(The American Society of Mechanical Engineers (ASME), 2017)The demand for more environmentally friendly and economic power production has led to an increasing interest to utilize alternative fuels. In the past, several investigations focusing on the effect of low-calorific fuels ... -
Design Considerations for Tip Clearance Control and Measurement on a Turbine Rainbow Rotor With Multiple Blade Tip Geometries
(The American Society of Mechanical Engineers (ASME), 2017)The accurate design, control, and monitoring of the running gaps between static and moving components are vital to preserve the mechanical integrity and ensure the correct functioning of any compact rotating machinery. ... -
Industrial Gas Turbine Health and Performance Assessment With Field Data
(The American Society of Mechanical Engineers (ASME), 2017)The paper presents a thorough analysis of the historical data and results acquired over a period of two years through an on-line real-time monitoring system installed at a combined heat and power (CHP) plant. For gas turbine ... -
Spatiotemporal Distribution of Soot Temperature for Flames Using Optical Pyrometry Under Unsteady Inlet Airflow Conditions
(The American Society of Mechanical Engineers (ASME), 2017)Two pyrometric tools for measuring soot temperature response in fuel-rich flames under unsteady inlet airflow conditions are developed. High-speed pyrometry using a high-speed color camera is used in producing soot temperature ... -
Impact of a Cooled Cooling Air System on the External Aerodynamics of a Gas Turbine Combustion System
(The American Society of Mechanical Engineers (ASME), 2017)To manage the increasing turbine temperatures of future gas turbines a cooled cooling air system has been proposed. In such a system some of the compressor efflux is diverted for additional cooling in a heat exchanger (HX) ... -
Experimental Validation of the Aerodynamic Characteristics of an Aero-engine Intercooler
(The American Society of Mechanical Engineers (ASME), 2017)Porous media model computational fluid dynamics (CFD) is a valuable approach allowing an entire heat exchanger system, including the interactions with its associated installation ducts, to be studied at an affordable ... -
Effect of Ambient Temperature and Humidity on Combustion and Emissions of a Spark-Assisted Compression Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2017)Spark-assisted compression ignition (SACI) offers more practical combustion phasing control and a lower pressure rise rate than homogeneous charge compression ignition (HCCI) combustion and improved thermal efficiency and ... -
Aerodynamics of Darrieus Wind Turbines Airfoils: The Impact of Pitching Moment
(The American Society of Mechanical Engineers (ASME), 2017)Recent studies have demonstrated that, when rotating around an axis orthogonal to the flow direction, airfoils are virtually transformed into equivalent airfoils with a camber line defined by their arc of rotation. In these ... -
Rotordynamic Performance of a Shaft With Large Overhung Mass Supported by Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2017)This work presents the theoretical and experimental rotordynamic evaluations of a rotor–air foil bearing (AFB) system supporting a large overhung mass for high-speed application. The proposed system highlights the compact ... -
Analytical Modeling and Experimental Validation of Heating at the Leaf Seal/Rotor Interface
(The American Society of Mechanical Engineers (ASME), 2017)The secondary air system of a modern gas or steam turbine is configured to satisfy a number of requirements, such as to purge cavities and maintain a sufficient flow of cooling air to key engine components, for a minimum ... -
Introduction of a New Numerical Simulation Tool to Analyze Micro Gas Turbine Cycle Dynamics
(The American Society of Mechanical Engineers (ASME), 2017)Micro gas turbine (MGT) technology is evolving toward a large variety of novel applications, such as weak gas electrification, inverted Brayton cycles, and fuel cell hybrid cycles; however, many of these systems show very ... -
Scaling Laws for Radial Clearance and Support Structure Stiffness of Radial Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2017)Design and analysis of foil bearings involve consideration to various physical aspects such as fluid pressure, structural deformation, and heat generation due to viscous effects within the bearing. These complex physical ... -
On the Predicted Effect of Angular Misalignment on the Performance of Oil Lubricated Thrust Collars in Integrally Geared Compressors
(The American Society of Mechanical Engineers (ASME), 2017)Multiple-stage integrally geared compressors (IGCs) offer improved thermal efficiency and easier access for maintenance and overhaul than single-shaft centrifugal compressors. In an IGC, a main bull shaft drives pinion ...