Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3701-3720 of 9564
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A Theoretical Approach for Passive Control of Thermoacoustic Oscillations: Application to Ducted Flames
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, we develop a linear technique that predicts how the stability of a thermoacoustic system changes due to the action of a generic passive feedback device or a generic change in the base state. From this, one ... -
Artificial Neural Network–Based System Identification for a Single Shaft Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2013)During recent decades, artificial intelligence has been employed as a powerful tool for identification of complex industrial systems with nonlinear dynamics, such as gas turbines (GT). In this study, a methodology based ... -
Analysis of Rotor Dynamic by One Dimensional Variable Kinematic Theories
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, Carrera's unified formulation (CUF) is used to perform freevibrational analyses of rotating structures. The CUF is a hierarchical formulation which offers a procedure to obtain refined structural theories ... -
Large Eddy Simulation of Flame Response to Transverse Acoustic Excitation in a Model Reheat Combustor
(The American Society of Mechanical Engineers (ASME), 2013)The response of a perfectly premixed, turbulent jet flame at elevated inflow temperature to high frequency flow perturbations is investigated. A generic reheat burner geometry is considered, where the spatial distribution ... -
Characteristics of Flame Modes for a Conical Bluff Body Burner With a Central Fuel Jet
(The American Society of Mechanical Engineers (ASME), 2013)Bluff body stabilized nonpremixed flames are usually used as pilot flames in leanpremixed combustors. Experiments are conducted to investigate the characteristics of the flame. Typical flame modes are investigated in both ... -
An Improved Nickel Based MIMS Thermocouple for High Temperature Gas Turbine Applications
(The American Society of Mechanical Engineers (ASME), 2013)A new nickel based thermocouple for high temperature applications in gas turbines has been devised at the Department of Material Science and Metallurgy of the University of Cambridge. This paper describes the new features ... -
Understanding Loss Mechanisms and Identifying Areas of Improvement for HCCI Engines Using Detailed Exergy Analysis
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents a detailed exergy analysis of homogeneous charge compression ignition (HCCI) engines, including a crankangle resolved breakdown of mixture exergy and exergy destruction. Exergy analysis is applied to a ... -
Modifying the Classical One Dimensional Catalyst Model to Include Axial Conduction and Diffusion
(The American Society of Mechanical Engineers (ASME), 2013)Lean NOx trap (LNT) catalytic aftertreatment devices are one potential option for the reduction of oxides of nitrogen (NOx) in the exhaust of compression ignition engines. They work through a controlled modulation between ... -
Large Eddy Simulation of Turbulent Spray Combustion in a Subscale Aircraft Jet Engine Combustor—Predictions of NO and Soot Concentrations
(The American Society of Mechanical Engineers (ASME), 2013)Largeeddy simulation (LES) is applied to turbulent spray combustion fields in a subscale (1/2) aircraft jet engine combustor with an airblast type swirl fuel nozzle and validity is examined by comparing with measurements. ... -
Thermodynamics Based Mean Value Model for Diesel Combustion
(The American Society of Mechanical Engineers (ASME), 2013)A thermodynamicsbased computationally efficient mean value engine model that computes ignition delay, combustion phases, exhaust temperature, and indicated mean effective pressure has been developed for the use of control ... -
Defeat of the Soot/NOx Trade off Using Biodiesel Ethanol in a Moderate Exhaust Gas Recirculation Premixed Low Temperature Combustion Mode
(The American Society of Mechanical Engineers (ASME), 2013)The soot/nitric oxides (NOx) tradeoff of diesel, biodiesel, and biodiesel–ethanol in a moderate exhaust gas recirculation (EGR) premixed low temperature combustion (LTC) mode is investigated in this study. Compared to ... -
Deposition of Corrosive Alkali Salt Vapors on the Blades of Gas Turbines Fueled by Coal Derived Syngases
(The American Society of Mechanical Engineers (ASME), 2013)Many proposed clean coal technologies for power generation couple a gasification process with a gas turbine combined cycle unit. In the gasifier, the coal is converted into a syngas which is then cleaned and fired before ... -
Experimental and Computational Determination of Laminar Burning Velocity of Liquefied Petroleum Gas Air Mixtures at Elevated Temperatures
(The American Society of Mechanical Engineers (ASME), 2013)The laminar burning velocity of liquefied petroleum gas (LPG) air mixtures at high temperatures is extracted from the planar flames stabilized in the preheated mesoscale diverging channel. The experiments were carried out ... -
The Teaching Value of Defining Iterative Design Projects in Serving Capstone Engineering Undergraduate Education
(The American Society of Mechanical Engineers (ASME), 2013)In the past several years, the traditional fourth year “handson†requirement for engineering programs in the U.S. is being satisfied by what is now called the capstone senior design project (herein referred to as CSDP). ... -
Mission Performance Simulation of Integrated Helicopter–Engine Systems Using an Aeroelastic Rotor Model
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents an integrated approach, targeting the comprehensive assessment of combined helicopter engine designs within designated operations. The developed methodology comprises a series of individual modeling ... -
Active Outer Ring Cooling of High Loaded and High Speed Ball Bearings
(The American Society of Mechanical Engineers (ASME), 2013)Bearings for aero engine applications are subjected to a high thermal impact because of the elevated speeds and loads. The high rate of heat generation in the bearing cannot be sustained by the materials used and, in the ... -
Rotorcraft Engine Cycle Optimization at Mission Level
(The American Society of Mechanical Engineers (ASME), 2013)This work investigates the potential to reduce fuel consumption associated with civil rotorcraft operations at mission level, through optimization of the engine design point cycle parameters. An integrated simulation ... -
Inverted Brayton Cycle With Exhaust Gas Recirculation—A Numerical Investigation
(The American Society of Mechanical Engineers (ASME), 2013)Microgas turbine (MGT) based combined heat and power (CHP) units provide a highly efficient, lowpollutant technology to supply heat and electrical power from fossil and renewable energy sources; however, pressurized MGT ... -
A Highly Efficient Small Displacement Marine Two Stroke H2DI Engine With Low Emissions
(The American Society of Mechanical Engineers (ASME), 2013)A hydrogenfueled twostroke prototype demonstrator based on a 9.9 hp (7.4 kW) production gasoline marine outboard engine is presented, which, while matching the original engine's rated power output on hydrogen, achieves ... -
Analysis of the Exhaust Gas Recirculation System Performance in Modern Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2013)Exhaust gas recirculation (EGR) is extensively employed in diesel combustion engines to achieve nitrogen oxides emission targets. The EGR is often cooled in order to increase the effectiveness of the strategy, even though ...