Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3421-3440 of 9564
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NO Prediction in Turbulent Diffusion Flame Using Multiple Unsteady Laminar Flamelet Modeling
(The American Society of Mechanical Engineers (ASME), 2014)The steady laminar flamelet model (SLFM) (Peters, 1984, “Laminar Diffusion Flamelet Models in NonPremixed Turbulent Combustion,†Prog. Energy Combust. Sci., 10(3), pp. 319–339; Peters, 1986, “Laminar Flamelet ... -
Gray Box Modeling for Performance Control of an HCCI Engine With Blended Fuels
(The American Society of Mechanical Engineers (ASME), 2014)High fidelity models that balance accuracy and computation load are essential for realtime modelbased control of homogeneous charge compression ignition (HCCI) engines. Graybox modeling offers an effective technique to ... -
A Comparison of Valving Strategies Appropriate For Multimode Combustion Within a Downsized Boosted Automotive Engine—Part I: High Load Operation Within the Spark Ignition Combustion Regime
(The American Society of Mechanical Engineers (ASME), 2014)As future downsized boosted engines may employ multiple combustion modes, the goal of the current work is the definition of valving strategies appropriate for moderate to high load spark ignition (SI) combustion and at low ... -
A Comparison of Valving Strategies Appropriate for Multimode Combustion Within a Downsized Boosted Automotive Engine—Part II: Mid Load Operation Within the SACI Combustion Regime
(The American Society of Mechanical Engineers (ASME), 2014)Spark assisted compression ignition (SACI) is a combustion mode that may offer significant efficiency improvements compared to conventional sparkignited combustion systems. Unfortunately, SACI is constrained to a relatively ... -
Effect of Load on Close Coupled Post Injection Efficacy for Soot Reduction in an Optical Heavy Duty Diesel Research Engine
(The American Society of Mechanical Engineers (ASME), 2014)The use of closecoupled post injections is an incylinder sootreduction technique that has much promise for high efficiency heavyduty diesel engines. Closecoupled post injections, short injections of fuel that occur soon ... -
Experimental Investigation of the Variations of Early Flame Development in a Spark Ignition Direct Injection Optical Engine
(The American Society of Mechanical Engineers (ASME), 2014)Experiments under two intake air swirl levels (swirl ratios of 0.55 and 5.68) were conducted in order to investigate the early flame development of combustion in a singlecylinder sparkignition directinjection engine. The ... -
Analysis of Aluminum and Steel Pistons—Comparison of Friction, Piston Temperature, and Combustion
(The American Society of Mechanical Engineers (ASME), 2014)While steel pistons have been in use for a long time in commercial vehicle diesel engines, the first series production applications for passenger car diesel engines are currently imminent. The main reason for the use of ... -
A Study on Biodiesel NOx Emission Control With the Reduced Chemical Kinetics Model
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, the effects of the start of injection (SOI) timing and exhaust gas recirculation (EGR) rate on the nitrogen oxides (NOx) emissions of a biodieselpowered diesel engine are studied with computational fluid ... -
Performance and Emissions Characteristics of Diesel Ignited Gasoline Dual Fuel Combustion in a Single Cylinder Research Engine
(The American Society of Mechanical Engineers (ASME), 2014)Dieselignited gasoline dual fuel combustion experiments were performed in a singlecylinder research engine (SCRE), outfitted with a commonrail diesel injection system and a standalone engine controller. Gasoline was injected ... -
Design, Evaluation and Performance Analysis of Staged Low Emission Combustors
(The American Society of Mechanical Engineers (ASME), 2014)The most uncertain and challenging part in the design of a gas turbine has long been the combustion chamber. There has been a large number of experimentations in industry and universities alike to better understand the ... -
Flame Structure Effects at High G Loading
(The American Society of Mechanical Engineers (ASME), 2014)Previous research has been conducted showing significant benefits on combustion efficiency and stability by creating high gravityloaded combustion environments. Ultracompact combustor systems decrease the size and weight ... -
Erratum: “Correlation Between Speciated Hydrocarbon Emissions and FID Response for Blends of Gasoline With Ethanol and Butanol†[Journal of Engineering for Gas Turbines and Power, 2011, 133, p. 082801, DOI: 10.1115/1.4002893]
(The American Society of Mechanical Engineers (ASME), 2014)Equation (9) on page 7 of the original manuscript contains an error. The correct equation isRF=A+Bأ—Volأ—n+Cأ—Vol2+Dأ—n2+Eأ—Vol2أ—n+Fأ—Volأ—n2 -
Computational Fluid Dynamics Simulations and Experiments for Reduction of Oil Churning Loss and Windage Loss in Aeroengine Transmission Gears
(The American Society of Mechanical Engineers (ASME), 2014)The demand for power generation capacity has increased considerably due to the electric drive of cabin air conditioners and commercial aircraft engines. It is estimated that power losses may increase in the accessory gearbox ... -
Validation of a Three Dimensional Internal Nozzle Flow Model Including Automatic Mesh Generation and Cavitation Effects
(The American Society of Mechanical Engineers (ASME), 2014)Fuel injectors often experience cavitation due to regions of extremely low pressure. In this work, a cavitation modeling method is implemented in the CONVERGE computational fluid dynamics (CFD) code in order to model the ... -
A Field Balancing Technique Based on Virtual Trial Weights Method for a Magnetically Levitated Flexible Rotor
(The American Society of Mechanical Engineers (ASME), 2014)For a magnetically levitated flexible rotor (MLFR), the amount of residual imbalance not only generates undesired vibrations, but also results in excessive bending, which may cause it hit to the auxiliary bearings. Thus, ... -
Simulation of Full and Part Load Performance Deterioration of Industrial Two Shaft Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, common faults in main components of an industrial twoshaft gas turbine are simulated, and the fault signatures are determined in both part and fullload conditions. As fouling and erosion are the most important ... -
Active/Passive Hybrid Control System for Compressor Surge Based on Fuzzy Logic
(The American Society of Mechanical Engineers (ASME), 2014)A hybrid control system has been proposed for compressor surge, which combines the active method with the passive method. A bleed valve was selected as the actuator in the proposed system. As a submode of the hybrid system, ... -
Variable Kinematic One Dimensional Finite Elements for the Analysis of Rotors Made of Composite Materials
(The American Society of Mechanical Engineers (ASME), 2014)This paper deals with the dynamic response of rotors made of anisotropic, laminated composite materials. It is a sequel to the authors’ previous work, which was devoted to the rotordynamics of metallic structures. The ... -
Multiple Model Sensor and Components Fault Diagnosis in Gas Turbine Engines Using Autoassociative Neural Networks
(The American Society of Mechanical Engineers (ASME), 2014)In this paper the problem of fault diagnosis in an aircraft jet engine is investigated by using an intelligentbased methodology. The proposed fault detection and isolation (FDI) scheme is based on the multiple model approach ... -
Experimental and Numerical Investigation Into the Aerodynamics of a Novel Steam Turbine Valve and Its Field Application
(The American Society of Mechanical Engineers (ASME), 2014)Control valves are one of the key steam turbine components that guarantee operational safety in a power plant. There are two aerodynamic aspects, which are the current focus for the development of Alstom's valves. One is ...