Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2501-2520 of 9564
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On the Transient Three-Dimensional Tribodynamics of Internal Combustion Engine Top Compression Ring
(The American Society of Mechanical Engineers (ASME), 2017)There are increasing pressures upon the automotive industry to reduce harmful emissions as well as meeting the key objective of enhanced fuel efficiency, while improving or retaining the engine output power. The losses in ... -
Combustion Characteristics of a Two-Dimensional Twin Cavity Trapped Vortex Combustor
(The American Society of Mechanical Engineers (ASME), 2017)Trapped vortex combustor (TVC) is a relatively new concept, having potential application in gas turbine engines. In this work, an attempt has been made to characterize the 2D twin cavity TVC experimentally in terms of its ... -
A Real-Time Combustion Control With Reconstructed In-Cylinder Pressure by Principal Component Analysis for a CRDI Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2017)This paper proposes a real-time combustion control algorithm using reconstructed in-cylinder pressure traces by principal component analysis (PCA). The PCA method reconstructs the in-cylinder pressure traces using the ... -
High-Frequency Thermoacoustic Modulation Mechanisms in Swirl-Stabilized Gas Turbine Combustors—Part I: Experimental Investigation of Local Flame Response
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents the experimental approach for determination and validation of noncompact flame transfer functions of high-frequency, transverse combustion instabilities observed in a generic lean premixed gas turbine ... -
System-Level Performance of Microturbines With an Inside-Out Ceramic Turbine
(The American Society of Mechanical Engineers (ASME), 2017)Ceramic turbines can reduce fuel consumption by increasing turbine inlet temperatures (TIT). The need for heat-resistant materials like ceramics is particularly acute for small turbomachines for which efficiencies are ... -
Use of Rib Turbulators to Enhance Postimpingement Heat Transfer for Curved Surface
(The American Society of Mechanical Engineers (ASME), 2017)The present study aims to investigate the heat transfer and pressure loss characteristics for multiple rows of jets impinging on a curved surface in the presence of rib turbulators. The target plate contains a straight ... -
Cold-Air Bypass Characterization for Thermal Management of Fuel Cell Gas Turbine Hybrids
(The American Society of Mechanical Engineers (ASME), 2017)The effect of cathode airflow variation on the dynamics of a fuel cell gas turbine hybrid system was evaluated using a cyber-physical emulator. The coupling between cathode airflow and other parameters, such as turbine ... -
Low-Order Modeling of Nonlinear High-Frequency Transversal Thermoacoustic Oscillations in Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2017)This paper analyzes transversal thermoacoustic oscillations in an experimental gas turbine combustor utilizing dynamical system theory. Limit-cycle acoustic motions related to the first linearly unstable transversal mode ... -
High-Frequency Thermoacoustic Modulation Mechanisms in Swirl-Stabilized Gas Turbine Combustors—Part II: Modeling and Analysis
(The American Society of Mechanical Engineers (ASME), 2017)This paper deals with high-frequency (HF) thermoacoustic instabilities in swirl-stabilized gas turbine combustors. Driving mechanisms associated with periodic flame displacement and flame shape deformations are theoretically ... -
Study of Starting Problem of Axisymmetric Divergent Dual Throat Nozzle
(The American Society of Mechanical Engineers (ASME), 2017)Compared to the conventional axisymmetric dual throat nozzle, the axisymmetric divergent dual throat nozzle (ADDTN) can offer larger thrust vector angles. However, the starting problem maybe exists in the ADDTN and results ... -
A Research on Waste-Gated Turbine Performance Under Unsteady Flow Condition
(The American Society of Mechanical Engineers (ASME), 2017)Turbochargers are key components of engine air-paths that must be carefully considered during the development process. The combination of fluid, mechanical, and thermal phenomenon make the turbocharger a highly dynamic and ... -
Effect of Buoyancy-Induced Rotating Flow on Temperatures of Compressor Disks
(The American Society of Mechanical Engineers (ASME), 2017)Calculation of the clearances between the blades and casing of the high-pressure-compressor rotors in aeroengines involves calculating the radial growth of the corotating compressor disks. This requires the calculation of ... -
A Robust Industrial Procedure for Measuring Modal Sound Fields in the Development of Radial Compressor Stages
(The American Society of Mechanical Engineers (ASME), 2017)The turbocharger is a significant noise source in large diesel engines, such as those used in container vessels. Its main noise source is the radial compressor, where improvements in silencers and turbocharger insulation ... -
An Automated Approach to Nacelle Parameterization Using Intuitive Class Shape Transformation Curves
(The American Society of Mechanical Engineers (ASME), 2017)A tool to create parametric aerodynamic shapes using intuitive design variables based on class shape transformation (CST) curves is presented. To enable this, a system has been developed which accepts arbitrary constraints ... -
Differential Equation-Based Specification of Turbulence Integral Length Scales for Cavity Flows
(The American Society of Mechanical Engineers (ASME), 2017)A new modeling approach has been developed that explicitly accounts for expected turbulent eddy length scales in cavity zones. It uses a hybrid approach with Poisson and Hamilton–Jacobi differential equations. These are ... -
Noninvasive Parameter Identification in Rotordynamics Via Fluid Film Bearings—Linking Active Lubrication and Operational Modal Analysis
(The American Society of Mechanical Engineers (ASME), 2017)In recent years, theoretical and experimental efforts have transformed the conventional tilting-pad journal bearing (TPJB) into a smart mechatronic machine element. The application of electromechanical elements into rotating ... -
Thermal Behavior of Radial Foil Bearings Supporting an Oil-Free Gas Turbine: Design of the Cooling Flow Passage and Modeling of the Thermal System
(The American Society of Mechanical Engineers (ASME), 2017)Gas foil bearings (GFBs) have many noticeable advantages over the conventional rigid gas bearings, such as frictional damping of the compliance structure and tolerance to the rotor misalignment, so they have been successfully ... -
Labyrinth Seal Leakage Degradation Due to Various Types of Wear
(The American Society of Mechanical Engineers (ASME), 2017)This paper systematically presents a complete leakage comparison for various types of wear experienced by labyrinth seals. Labyrinth seals used in turbine engines are designed to work at a clearance during steady-state ... -
Including Housing–Casing Fluid in a Lateral Rotordynamics Analysis on Electric Submersible Pumps
(The American Society of Mechanical Engineers (ASME), 2017)Stability and synchronous-response predictions, which were presented by Childs et al. (2014, “A Lateral Rotordynamics Primer on Electric Submersible Pumps (ESPs) for Deep Subsea Applications,” 43th International Pump Users ... -
Forced Response Analysis of a Mistuned, Compressor Blisk Comparing Three Different Reduced Order Model Approaches
(The American Society of Mechanical Engineers (ASME), 2017)Accurate structural modeling of blisk mistuning is critical for the analysis of forced response in turbomachinery. Apart from intentional mistuning, mistuning can be due to the manufacturing tolerances, corrosion, foreign ...