Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3081-3100 of 9564
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An Energy Based Method for Predicting the Additive Effect of Multiple Film Cooling Rows
(The American Society of Mechanical Engineers (ASME), 2015)There have been numerous studies reporting film effectiveness for film rows in isolation, which have led to correlations that are used for preliminary design. Many applications require multiple film cooling rows. Although ... -
Gas Turbine Engine Behavioral Modeling
(The American Society of Mechanical Engineers (ASME), 2015)This paper develops and validates a power flow behavioral model of a gas turbine engine (GTE) composed of a gas generator and free power turbine. The behavioral model is suitable for supervisory level (optimal) controller ... -
Heat Transfer Enhancement Due to Coolant Extraction on the Cold Side of Effusion Cooling Plates
(The American Society of Mechanical Engineers (ASME), 2015)Effusion cooling represents one of the most innovative techniques to limit and control the metal temperature of combustors liner, and recently, attention has been paid by the scientific community on the characterization ... -
Partial Stall Effects on the Failure of an Axial Compressor Blade
(The American Society of Mechanical Engineers (ASME), 2015)This paper is aimed to show the effects of partial stall on the fracture of the first stage rotating blades of the gas turbine compressors of an onshore gas refinery. The first part of the paper deals with the results of ... -
Reconciling Compressor Performance Differences for Varying Ambient Inlet Conditions
(The American Society of Mechanical Engineers (ASME), 2015)Careful experimental measurements can capture small changes in compressor total pressure ratio (TPR), which arise with subtle changes in an experiment's configuration. Research facilities that use unconditioned atmospheric ... -
Temperature Ratio Effects on Bluff Body Wake Dynamics Using Large Eddy Simulation and Proper Orthogonal Decomposition
(The American Society of Mechanical Engineers (ASME), 2015)In this article, we describe the use of proper orthogonal decomposition (POD) to investigate how the dominant wake structures of a bluffbodystabilized turbulent premixed flame are affected by the heat released by the flame ... -
Design Space Exploration and Optimization of Conceptual Rotorcraft Powerplants
(The American Society of Mechanical Engineers (ASME), 2015)This paper demonstrates the application of an integrated rotorcraft multidisciplinary design and optimization framework, deployed for the purpose of preliminary design and assessment of optimum regenerative powerplant ... -
Numerical and Experimental Study for Unsteady Oil Film Thickness of the Rotating Cylinder Chamber Wall
(The American Society of Mechanical Engineers (ASME), 2015)The oil film thickness on the bearing chamber wall directly affects the wall heat transfer efficiency, so a fundamental study on the motion of oil film on the rotating cylinder has been conducted to this end. On the one ... -
Effect of Pad Flexibility on the Performance of Tilting Pad Journal Bearings—Benchmarking a Predictive Model
(The American Society of Mechanical Engineers (ASME), 2015)Tilting pad journal bearings (TPJBs) supporting highperformance turbomachinery rotors have undergone steady design improvements to satisfy ever stringent operating conditions that include large specific loads, due to smaller ... -
Development and Validation of a Three Dimensional Computational Fluid Dynamics Analysis for Journal Bearings Considering Cavitation and Conjugate Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2015)Computational fluid dynamics (CFD) analysis, which solves the full threedimensional (3D) Navier–Stokes equations, has been recognized as having promise in providing a more detailed and accurate analysis for oilfilm journal ... -
Reynolds Averaged Navier–Stokes and Large Eddy Simulation Investigation of Lean Premixed Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2015)Reynoldsaveraged Navier–Stokes (RANS) and largeeddy simulations (LES) of a Siemens scaled combustor are compared against comprehensive experimental data. The steady RANS simulation modeled one quarter of the geometry ... -
Lean HCCI/Rich SACI Gasoline Combustion Cycling and Three Way Catalyst for Fuel Efficiency and NOx Reduction
(The American Society of Mechanical Engineers (ASME), 2015)Multimode combustion (MMC) concepts using homogeneous charge compression ignition (HCCI) gasoline combustion at low loads and spark assisted compression ignition (SACI) gasoline combustion at medium loads have the potential ... -
Estimation Methodology for Automotive Turbochargers Speed Fluctuations Due to Pulsating Flows
(The American Society of Mechanical Engineers (ASME), 2015)Turbocharging technique, together with engine downsizing, will play a fundamental role in the near future as a way to reach the required maximum performance while reducing engine displacement and, consequently, CO2 emissions. ... -
A Study of Combustion Inefficiency in Diesel Low Temperature Combustion and Gasoline–Diesel RCCI Via Detailed Emission Measurement
(The American Society of Mechanical Engineers (ASME), 2015)Reduction of engineout NOx emissions to ultralow levels is facilitated by enabling low temperature combustion (LTC) strategies. However, there is a significant energy penalty in terms of combustion efficiency as evidenced ... -
Propensity of Soot Deposition in a Rectangular Exhaust Gas Recirculation Cooler Using Kalman Filter
(The American Society of Mechanical Engineers (ASME), 2015)The detection of fouling in exhaust gas recirculation (EGR) coolers of diesel engines should be fast and accurate. This would facilitate deciding an effective strategy to combat fouling and to prolong the lifetime of EGR ... -
Numerical Investigation of the Effect of Knock on Heat Transfer in a Turbocharged Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2015)This investigation deals with the EF7 (TC) engine, a dual fuel engine equipped with a turbocharger system, consequently with a high probability of knock inception. In this study, an operating cycle of the engine was simulated ... -
Minimization of Heat Load Due to Secondary Reactions in Fuel Rich Environments
(The American Society of Mechanical Engineers (ASME), 2015)The demand for increased thrust, higher engine efficiency, and reduced fuel consumption has increased the turbine inlet temperature and pressure in modern gas turbine engines. The outcome of these higher temperatures and ... -
Study of New Exhaust Ejector for Marine Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2015)With the development at infrared guidance weapon, the survival of the ship, especially in high risk areas, is facing serious challenges. In order to improve its survival ability, infrared suppression system emerges. Marine ... -
Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity—Part II
(The American Society of Mechanical Engineers (ASME), 2015)When gas turbine engines operate in environments where the intake air has some concentration of particles, the engine will experience degradation. Very few studies of such microparticles approaching their melting temperatures ... -
Multi objective Optimization of a Regenerative Rotorcraft Powerplant: Trade off Between Overall Engine Weight and Fuel Economy
(The American Society of Mechanical Engineers (ASME), 2015)A computationally efficient and cost effective simulation framework has been implemented to perform design space exploration and multiobjective optimization for a conceptual regenerative rotorcraft powerplant configuration ...