Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3541-3560 of 9564
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The Impact of Hole Depth on the Rotordynamic and Leakage Characteristics of Hole Pattern Stator Gas Annular Seals
(The American Society of Mechanical Engineers (ASME), 2014)Test results are presented for rotordynamic characteristics of holepatternstator annular gas seals at a 70 bar supply pressures with a running speed of 20,200 rpm. Leakage results are presented for these conditions and ... -
Effect of Bending and Mushrooming Damages on Heat Transfer Characteristic in Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2014)Using conjugate heat transfer calculations, the heat transfer in straightthrough labyrinth seals with and without rub damages (bending and mushrooming damages) were numerically investigated. Firstly, the numerical methods ... -
Nonlinear Compensators of Exhaust Gas Recirculation and Variable Geometry Turbocharger Systems using Air Path Models for a CRDI Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2014)This paper investigates the design of modelbased feedforward compensators for exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT) systems using air path models for a commonrail direct injection (CRDI) ... -
A Data Driven Approach for Condition Monitoring of Reciprocating Compressor Valves
(The American Society of Mechanical Engineers (ASME), 2014)This paper focuses on conditionmonitoring of three different valve failure modes common in reciprocating compressors. They are missing valve poppets, valve spring fatigue, and valve seat wear. First, a targeted instrumentation ... -
Pyrometric Estimation of Exhaust Valve Temperature of an Internal Combustion Engine
(The American Society of Mechanical Engineers (ASME), 2014)The estimation of exhaust valve temperature of an internal combustion engine during its operation would be very useful for a more reliable and accurate design of valves and, more in general, of the whole valvetrain system. ... -
Analysis and Design of a Lightweight High Specific Power Two Stroke Polygon Engine
(The American Society of Mechanical Engineers (ASME), 2014)Current trends in engine design have pushed the state of the art regarding high powertoweight ratio gasoline engines. Newly developed engine systems have a powertoweight ratio near 1 hp per pound. The engine configuration ... -
Residence Time Distribution in a Swirling Flow at Nonreacting, Reacting, and Steam Diluted Conditions
(The American Society of Mechanical Engineers (ASME), 2014)Residence time distributions in a swirling, premixed combustor flow are determined by means of tracer experiments and a reactor network model. The measurements were conducted at nonreacting, reacting, and steamdiluted ... -
An Experimental Study on Smoke Reduction Effect of Post Injection in Combination With Pilot Injection for a Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2014)With the universal utilization of the commonrail injection system in automotive diesel engines, the multistage injection strategies have become typical approaches to satisfy the increasingly stringent emission regulations, ... -
Traversing Hot Jet Ignition in a Constant Volume Combustor
(The American Society of Mechanical Engineers (ASME), 2014)Hotjet ignition of a combustible mixture has application in internal combustion engines, detonation initiation, and wave rotor combustion. Numerical predictions are made for ignition of combustible mixtures using a traversing ... -
On the Influence of Fuel Distribution on the Flame Structure of Bluff Body Stabilized Flames
(The American Society of Mechanical Engineers (ASME), 2014)This paper describes recent learning on the flame structure associated with bluffbody stabilized flames and the influence of the fuel distribution with nonpremixed, jetincrossflow fuel injection. Recent experimental and ... -
A Novel Damping Device for Broadband Attenuation of Low Frequency Combustion Pulsations in Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2014)Damping of thermoacoustically induced pressure pulsations in combustion chambers is a major focus of gas turbine operation. Conventional Helmholtz resonators are an excellent means to attenuate thermoacoustic instabilities ... -
Experimental Identification of Force Coefficients of Large Hybrid Air Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2014)Foil bearing technology using air or gas as a lubricant has been around since the mid1960s, and it made significant progress in its reliability, performance, and applications. Even if significant progress has been made to ... -
Development of a Real Time NOx Prediction Model Based on Heat Release Analysis in a Direct Injection Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2014)A prediction model, which describes linear relationship between the nitrogen oxides (NOx) emissions and the incylinder heat release rate in a directinjection diesel engine, was developed through numerical simulations. A ... -
Controlling Plane Jet Flame by a Fluidic Oscillation Technique
(The American Society of Mechanical Engineers (ASME), 2014)A planejet flame was manipulated by passing the fuel jet through a jetimpingement fluidic oscillator. The plane fuel jet bifurcated into two streams of selfsustained pulsating jets in the cavity of the fluidic oscillator ... -
Evaluation of Foil Bearing Performance and Nonlinear Rotordynamics of 120 kW Oil Free Gas Turbine Generator
(The American Society of Mechanical Engineers (ASME), 2014)This paper presents a design approach of air foil bearings (AFBs) for a 120 kWe gas turbine generator, which is a single spool configuration with gas generator turbine and alternator rotor connected by a diaphragm coupling. ... -
Aircraft Engine Gas Path Diagnostic Methods: Public Benchmarking Results
(The American Society of Mechanical Engineers (ASME), 2014)Recent technology reviews have identified the need for objective assessments of aircraft engine health management (EHM) technologies. To help address this issue, a gas path diagnostic benchmark problem has been created and ... -
Stress, Strain, and Energy at Fracture of Degraded Surfaces: Study of Replicates of Rough Surfaces
(The American Society of Mechanical Engineers (ASME), 2014)Due to the aging of structures, the issues of plant life management and license extension are receiving increasing emphasis in many countries. Understanding failure of structures due to random roughness on surfaces at early ... -
Simulation of Solarized Combined Cycles: Comparison Between Hybrid Gas Turbine and ISCC Plants
(The American Society of Mechanical Engineers (ASME), 2014)The present paper investigates two different solarized combined cycle layout configurations. In the first scheme, a solarized gas turbine is coupled to a solar tower. Pressurized air at the compressor exit is sent to the ... -
Exergetic Assessment of a Syngas Redox Based IGCC Plant for Generating Electricity
(The American Society of Mechanical Engineers (ASME), 2014)Carbon capture from advanced integrated gasification combinedcycle (IGCC) processes should outperform conventional coal combustion with subsequent CO2 separation in terms of efficiency and CO2 capture rates. This paper ... -
Mild Hybridization via Electrification of the Air System: Electrically Assisted and Variable Geometry Turbocharging Impact on an Off Road Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2014)Electric turbocharger assistance consists in incorporating an electric motor/generator within the turbocharger bearing housing to form a mild hybrid system without altering other mechanical parts of the engine. This makes ...