Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1961-1980 of 9564
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Effects of Effusion Cooling Pattern Near the Dilution Hole for a Double-Walled Combustor Liner—Part 1: Overall Effectiveness Measurements
(The American Society of Mechanical Engineers (ASME), 2019)The complex flow field in a gas turbine combustor makes cooling the liner walls a challenge. In particular, this paper is primarily focused on the region surrounding the dilution holes, which is especially challenging to ... -
Surrogate Modeling of Manufacturing Variation Effects on Unsteady Interactions in a Transonic Turbine
(The American Society of Mechanical Engineers (ASME), 2019)This effort develops a surrogate modeling approach for predicting the effects of manufacturing variations on performance and unsteady loading of a transonic turbine. Computational fluid dynamics (CFD) results from a set ... -
A Mistuned Forced Response Analysis of an Embedded Compressor Blisk Using a Reduced-Order Model
(The American Society of Mechanical Engineers (ASME), 2019)Accuracy when assessing mistuned forced response analyses is still a major concern. Since a fully coupled analysis is still very computational expensive, several simplifications and reduced-order models (ROMs) are carried ... -
Effect of Aluminized Coating on Combined Low and High Cycle Fatigue Life of Turbine Blade at Elevated Temperature
(The American Society of Mechanical Engineers (ASME), 2019)Some cracks were detected on the fir-tree root of turbine blade in an in-service aero-engine, and the aluminized coating was considered to be the main cause of these cracks. To study the effect of aluminized coating on ... -
Development of a RANS Premixed Turbulent Combustion Model Based on the Algebraic Flame Surface Density Concept
(The American Society of Mechanical Engineers (ASME), 2019)Recently, a fractal-based algebraic flame surface density (FSD) premixed combustion model has been derived and validated in the context of large eddy simulation (LES). The fractal parameters in the model, namely the cut-off ... -
Challenges and Solutions for Utilization of Bioliquids in Microturbines
(The American Society of Mechanical Engineers (ASME), 2019)Increased public concerns and stricter regulatory frameworks promote the role of bioliquids (liquid fuel for energy purposes other than for transport, including electricity and heating and cooling, produced from biomass). ... -
A New Index to Evaluate the Potential Damage of a Surge Event: The Surge Severity Coefficient
(The American Society of Mechanical Engineers (ASME), 2019)Industrial compressors suffer from strong aerodynamic instability that arises when low ranges of flow rate are achieved; this instability is called surge. This phenomenon creates strong vibrations and forces acting on the ... -
Centrifugal Compressor Design for Near-Critical Point Applications
(The American Society of Mechanical Engineers (ASME), 2019)The supercritical CO2 (sCO2) Brayton cycle has been attracting much attention to produce the electricity power, chiefly due to its higher thermal efficiency with the relatively lower temperature at the turbine inlet compared ... -
Numerical Investigation on the Leakage and Rotordynamic Characteristics for Three Types of Annular Gas Seals in Wet Gas Conditions
(The American Society of Mechanical Engineers (ASME), 2019)The modern compressor operation is challenged by the liquid presence in wet gas operating conditions. The liquid phase may affect the compressor stability by partially flooding the internal annular gas seals and inducing ... -
Leakage and Rotordynamic Force Coefficients of A Three-Wave (Air in Oil) Wet Annular Seal: Measurements and Predictions
(The American Society of Mechanical Engineers (ASME), 2019)In subsea environments, multiphase pumps and compressors add pressure to the process fluid, thus enabling long distance tie back systems that eliminate topside oil and gas separation stations. One challenge to construct a ... -
Novel Test Facility for Investigation of the Impact of Thermally Induced Stress Gradients on Fatigue Life of Cooled Gas Turbine Components
(The American Society of Mechanical Engineers (ASME), 2019)A novel test facility has been designed and setup for the investigation of the influence of stationary temperature, and thus thermally induced stress gradients with respect to the damage evolution of cooled gas turbine ... -
An Experimental Study for the Development of Mandrel-Free Hot-Spinning for Large Size Titanium Alloy Plate Forming
(The American Society of Mechanical Engineers (ASME), 2019)A mandrel-free hot-spinning was developed as a near-net-shape titanium alloy plate forming technique. In this work, a Ti–6Al–4V alloy conical product with a wall angle of 34 deg and 170 mm height was formed from a large ... -
Gas Turbine Fouling: A Comparison Among 100 Heavy-Duty Frames
(The American Society of Mechanical Engineers (ASME), 2019)Over recent decades, the variability and high costs of the traditional gas turbine fuels (e.g., natural gas) have pushed operators to consider low-grade fuels for running heavy-duty frames. Synfuels, obtained from coal, ... -
Experimental Investigation of an Inverted Brayton Cycle for Exhaust Gas Energy Recovery
(The American Society of Mechanical Engineers (ASME), 2019)Exhaust gases from an internal combustion engine (ICE) contain approximately 30% of the total energy released from combustion of the fuel. In order to improve fuel economy and reduce emissions, there are a number of ... -
Characterization of a Supersonic Turbine Downstream of a Rotating Detonation Combustor
(The American Society of Mechanical Engineers (ASME), 2019)Rotating detonation combustors (RDCs) offer theoretically a significant total pressure increase, which may result in enhanced cycle efficiency. The fluctuating exhaust of RDC, however, induces low supersonic flow and large ... -
Multi-Lead Direct Current Potential Drop Method for In Situ Health Monitoring of Ceramic Matrix Composites
(The American Society of Mechanical Engineers (ASME), 2019)The method of direct current potential drop (DCPD) can be utilized as an effective and convenient approach for in situ damage detection, and as a nondestructive evaluation technique. We present the results from use of a ... -
Double Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure Gradient
(The American Society of Mechanical Engineers (ASME), 2019)Experimentally measured results are presented for different experimental conditions for a test plate with double wall cooling, composed of full-coverage effusion-cooling on the hot side of the plate, and cross-flow cooling ... -
Large Eddy Simulation of a Premixed Flame in Hot Vitiated Crossflow With Analytically Reduced Chemistry
(The American Society of Mechanical Engineers (ASME), 2019)This numerical study deals with a premixed ethylene–air jet at 300 K injected into a hot vitiated crossflow at 1500 K and atmospheric pressure. The reactive jet in crossflow (RJICF) was simulated with compressible 3D large ... -
Experimental and Numerical Investigation of Environmental Barrier Coated Ceramic Matrix Composite Turbine Airfoil Erosion
(The American Society of Mechanical Engineers (ASME), 2019)Ceramic matrix composite (CMC) have higher temperature durability and lower density property compared to nickel-based super-alloys which so far have been widely applied to hot section components of aero-engines/gas turbines. ... -
Life-Limiting Behavior of an Oxide/Oxide Ceramic Matrix Composite at Elevated Temperature Subject to Foreign Object Damage
(The American Society of Mechanical Engineers (ASME), 2019)The life-limiting behavior of an N720/alumina oxide/oxide ceramic matrix composite (CMC) was assessed in tension in air at 1200 °C for unimpacted and impacted specimens. CMC targets were subjected to ballistic impact at ...