Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3461-3480 of 9564
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Impact of Inlet Filter Pressure Loss on Single and Two Spool Gas Turbine Engines for Different Control Modes
(The American Society of Mechanical Engineers (ASME), 2014)Inlet filtration systems are designed to protect industrial gas turbines from air borne particles and foreign objects, thereby improving the quality of air for combustion and reducing component fouling. Filtration systems ... -
Robust Fault Detection to Determine Compressor Surge Point Via Dynamic Neural Network Based Subspace Identification Technique
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, a dynamic neural network (DNN) based on robust identification scheme is presented to determine compressor surge point accurately using sensor fault detection (FD). The main innovation of this paper is to ... -
Numerical Study of Multistage Transcritical Organic Rankine Cycle Axial Turbines
(The American Society of Mechanical Engineers (ASME), 2014)Transonic flows through axial, multistage, transcritical organic rankine cycle (ORC) turbines are investigated by using a numerical solver including advanced multiparameter equations of state and a highorder discretization ... -
Unsteady Analysis on the Effects of Tip Clearance Height on Hot Streak Migration Across Rotor Blade Tip Clearance
(The American Society of Mechanical Engineers (ASME), 2014)This paper presents an investigation on the hot streak migration across rotor blade tip clearance in a high pressure gas turbine with different tip clearance heights. The blade geometry is taken from the first stage of ... -
Experimental/Numerical Investigation on the Effects of Trailing Edge Cooling Hole Blockage on Heat Transfer in a Trailing Edge Cooling Channel
(The American Society of Mechanical Engineers (ASME), 2014)Hot and harsh environments, sometimes experienced by gas turbine airfoils, can create undesirable effects such as clogging of the cooling holes. Clogging of the cooling holes along the trailing edge of an airfoil on the ... -
Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester1
(The American Society of Mechanical Engineers (ASME), 2014)This paper investigates the effect of a cetane improver on the autoignition characteristics of Sasol IPK in the combustion chamber of the ignition quality tester (IQT). The fuel tested was Sasol IPK with a derived cetane ... -
On the Combined Effect on Operating Range of Adjustable Inlet Guide Vanes and Variable Speed in Process Multistage Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2014)Adjustable inlet guide vanes (IGVs) and variable speed drivers are known as providing process compressors with an effective regulation all throughout the operating envelope of the machine. A large amount of work exists in ... -
The Maximum Allowable Misalignment in Hydrodynamic Rolling Hybrid Bearings
(The American Society of Mechanical Engineers (ASME), 2014)A hydrodynamic rolling hybrid bearing (HRHB) assembled coaxially by a rolling bearing and hydrodynamic bearing is developed to achieve two functions at low and high speeds. At low speeds, the rolling bearing of the HRHB ... -
Optical Investigation of the Effects of Ethanol/Gasoline Blends on Spark Assisted HCCI
(The American Society of Mechanical Engineers (ASME), 2014)Spark assist (SA) has been demonstrated to extend the operating limits of homogeneous charge compression ignition (HCCI) modes of engine operation. This experimental investigation focuses on the effects of 100% indolene ... -
A Detailed Validation Study of Multi Environment Eulerian Probability Density Function Transport Method for Modeling Turbulent Nonpremixed Combustion
(The American Society of Mechanical Engineers (ASME), 2014)The current work involves the validation of presumed shape multienvironment Eulerian probability density function (PDF) transport method (MEPDF) using direct quadrature method of moments (DQMOM)interaction by exchange with ... -
A Comparative Computational Fluid Dynamics Study on Flamelet Generated Manifold and Steady Laminar Flamelet Modeling for Turbulent Flames
(The American Society of Mechanical Engineers (ASME), 2014)The laminar flamelet model (LFM) (Peters, 1986, “Laminar Diffusion Flamelet Models in NonPremixed Combustion,†Prog. Energy Combust. Sci., 10, pp. 319–339; Peters, “Laminar Flamelet Concepts in Turbulent Combustion,†... -
Influence of Large Wake Disturbances Shed From the Combustor Wall on the Leading Edge Film Cooling
(The American Society of Mechanical Engineers (ASME), 2014)The first vane leading edge film cooling is challenging because of the highest thermal load and the complex flow interaction between the hot mainstream gas and the coolant flow. This interaction varies significantly from ... -
Assessment and Characterization of Volcanic Ash Threat to Gas Turbine Engine Performance
(The American Society of Mechanical Engineers (ASME), 2014)Multiple volcanoes erupt yearly propelling volcanic ash into the atmosphere and creating an aviation hazard. The plinian eruption type is most likely to create a significant aviation hazard. Plinian eruptions can eject ... -
Design of a Nonreacting Combustor Simulator With Swirl and Temperature Distortion With Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2014)Nonuniform combustor outlet flows have been demonstrated to have significant impact on the first and second stage turbine aerothermal performance. Richburn combustors, which generally have pronounced temperature profiles ... -
Dual Fuel Diesel Engine Combustion With Hydrogen, Gasoline, and Ethanol as Fumigants: Effect of Diesel Injection Timing
(The American Society of Mechanical Engineers (ASME), 2014)Premixed compression ignition (CI) combustion has attracted increasing research effort recently due to its potential to achieve both high thermal efficiency and low emissions. Dualfuel strategies for enabling premixed CI ... -
Design and Development of a Specially Modified Positive Displacement Rotary Screw Pump and Relevant Hydraulic Circuit to Enhance “Entrained Air Handling†Capability in a Closed Loop Lube Oil System
(The American Society of Mechanical Engineers (ASME), 2014)Rotary screw type positive displacement (RSPD) pumps are commonly used in oil and gas industry for pumping of mineral lube oil in services where they can be mechanically driven by gears coupled to a train driver. Installation ... -
Pre emptive Rotor Blade Damage Identification by Blade Tip Timing Method
(The American Society of Mechanical Engineers (ASME), 2014)The blade tip timing (BTT) method uses the differential arrival timings of the blades at casemounted sensors to effectively characterize the vibrations of all blades in a rotor. This paper studies the use of the BTT method ... -
Experimental Evaluation of Hydrodynamic Bearings for a High Speed Turbocharger
(The American Society of Mechanical Engineers (ASME), 2014)Many high speed turbochargers are known to operate with limit cycle vibration as a result of fluidfilm instability. The goal of this research was to achieve a stable synchronous response with a minimum of selfexcited ... -
Comparative Study of Flange to Seal Contact Couplings With Bolt Relaxation Under Creep Condition
(The American Society of Mechanical Engineers (ASME), 2014)Future coalfired steam turbines promise increased efficiency and low emissions. However, this comes at the expense of increased thermal load from higher inlet steam temperatures and pressures leading to severe creep that ... -
Steady State Engine Test Demonstration of Performance Improvement With an Advanced Turbocharger
(The American Society of Mechanical Engineers (ASME), 2014)Heavy EGR required on diesel engines for future emission regulation compliance has posed a big challenge to conventional turbocharger technology for high efficiency and wide operation range. This study, as part of the U.S. ...