Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3661-3680 of 9564
-
On the Failure of a Gas Foil Bearing: High Temperature Operation Without Cooling Flow
(The American Society of Mechanical Engineers (ASME), 2013)Implementing gas foil bearings (GFBs) in micro gas turbine engines is a proven approach to improve system efficiency and reliability. Adequate thermal management for operation at high temperatures, such as in a gas turbine ... -
Micro Gas Turbine Design for Small Scale Hybrid Solar Power Plants
(The American Society of Mechanical Engineers (ASME), 2013)Hybrid solar micro gasturbines are a promising technology for supplying controllable lowcarbon electricity in offgrid regions. A thermoeconomic model of three different hybrid micro gasturbine power plant layouts has been ... -
The Role of Pivot Stiffness on the Dynamic Force Coefficients of Tilting Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2013)Recent comprehensive experimental data showcasing the force coefficients of commercial size tilting pad journal bearings has brought to rest the long standing issue on the adequacy of the [K,C,M] physical model to represent ... -
The Effects of a Parametric Variation of the Rim Seal Geometry on the Interaction Between Hub Leakage and Mainstream Flows in High Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2013)The objective of this work was to assess and understand the effects of a parametric variation performed on a typical overlapping rim seal geometry. The datum geometry has been the focus of a detailed experimental investigation ... -
Discussion: “A Study of Sulfur Reactions in Furnace Deposits” (Weintraub, M., Goldberg, S., and Orning, A. A., 1961, ASME J. Eng. Power, 83, pp. 444–449)
(The American Society of Mechanical Engineers (ASME), 1961) -
A Systematic Approach to Estimate the Impact of the Aerodynamic Force Induced by Rotating Stall in a Vaneless Diffuser on the Rotordynamic Behavior of Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2013)One of the main challenges of the present industrial research on centrifugal compressors is the need for extending the left margin of the operating range of the machines. As a result, interest is being paid to accurately ... -
Damping and Inertia Coefficients for Two End Sealed Squeeze Film Dampers With a Central Groove: Measurements and Predictions
(The American Society of Mechanical Engineers (ASME), 2013)Aircraft engine rotors, invariably supported on rolling element bearings with little damping, are particularly sensitive to rotor imbalance and sudden maneuver loads. Most engines incorporate squeeze film dampers (SFDs) ... -
Capacitive Film Thickness Measurements in a Ventless Aero Engine Bearing Chamber—Influence of Operating Conditions and Offtake Design
(The American Society of Mechanical Engineers (ASME), 2013)The paper presents results from film thickness measurements in a bearing chamber test rig. The measurements were performed at different operating conditions and with two offtake designs. A discussion of the measurement ... -
Control of a Supercritical CO2 Recompression Brayton Cycle Demonstration Loop
(The American Society of Mechanical Engineers (ASME), 2013)The U.S. Department of Energy is currently focused on the development of nextgeneration nuclear power reactors, with an eye towards improved efficiency and reduced capital cost. To this end, reactors using a closedBrayton ... -
Assessment of a Gas Turbine NOx Reduction Potential Based on a Spatiotemporal Unmixedness Parameter
(The American Society of Mechanical Engineers (ASME), 2013)The paper presents a onedimensional approach to assess the reduction potential of NOx emissions for lean premixed gas turbine combustion systems. NOx emissions from these systems are known to be mainly caused by high ... -
A Novel Methodology for Optimal Design of Compressor Plants Using Probabilistic Plant Design
(The American Society of Mechanical Engineers (ASME), 2013)Equipment sizing decisions in the oil and gas industry often have to be made based on incomplete data. Often, the exact process conditions are based on numerous assumptions about well performance, market conditions, ... -
Rotordynamic Crack Diagnosis: Distinguishing Crack Depth and Location
(The American Society of Mechanical Engineers (ASME), 2013)The goal of this work is to establish simple condition monitoring principles for diagnosing the depth and location of transverse fatigue cracks in a rotordynamic system. The success of an online crack diagnosis regimen ... -
Progress of the 40 MW Class Advanced Humid Air Turbine Tests
(The American Society of Mechanical Engineers (ASME), 2013)A 40 MWclass test facility has been constructed to verify practicability of applying the advanced humid air turbine (AHAT) system to a heavyduty gas turbine. Verification tests have been carried out from January 2012, ... -
Alternative Microturbine Fuels Feasibility Study Through Thermal Stability, Material Compatibility, and Engine Testing
(The American Society of Mechanical Engineers (ASME), 2013)Historically, gas turbine fuels have been procured based on availability and low cost criteria. However,in the past few decades, with the growing concern over the negative environmental impacts produced by emissions, ... -
Impact of Cooling Air Injection on the Combustion Stability of a Premixed Swirl Burner Near Lean Blowout
(The American Society of Mechanical Engineers (ASME), 2013)In most dry, lowNOx combustor designs of stationary gas turbines, the front panel impingement cooling air is directly injected into the combustor primary zone. This air partially mixes with the swirling flow of premixed ... -
Design for Thermo Acoustic Stability: Modeling of Burner and Flame Dynamics
(The American Society of Mechanical Engineers (ASME), 2013)A design for thermoacoustic stability (DeTAS) procedure is presented that aims at selecting the most stable burner geometry for a given combustor. It is based on the premise that a thermoacoustic stability model of the ... -
Turbulent Flame Speed as an Indicator for Flashback Propensity of Hydrogen Rich Fuel Gases
(The American Society of Mechanical Engineers (ASME), 2013)The turbulent flame speed (ST) is proposed to be an indicator of the flashback propensity for hydrogenrich fuel gases at gas turbine relevant conditions. Flashback is an inevitable issue to be concerned about when introducing ... -
Performance Analysis of Organic Rankine Cycle With Preliminary Design of Radial Turbo Expander for Binary Cycle Geothermal Plants
(The American Society of Mechanical Engineers (ASME), 2013)In order to produce less emission of greenhouse gases, many studies have been done on the binarycycle geothermal power plant to obtain better performance. The radial turbo expanders play an important role in the performance ... -
Thermoacoustic Shape Optimization of a Subsonic Nozzle
(The American Society of Mechanical Engineers (ASME), 2013)Indirect combustion noise originates from the acceleration of nonuniform temperature or high vorticity regions when convected through a nozzle or a turbine. In a recent contribution (Giauque et al., 2012, “Analytical ... -
Implementation of Speed Variation in the Structural Dynamic Assessment of Turbomachinery Flow Path Components
(The American Society of Mechanical Engineers (ASME), 2013)During the design of turbomachinery flow path components, the assessment of possible structural resonant conditions is critical. Higher frequency modes of these structures are frequently found to be subject to resonance ...