Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2861-2880 of 9564
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Flat Plate Honeycomb Seals Friction Factor Analysis
(The American Society of Mechanical Engineers (ASME), 2016)Among the various types of seals used in gas turbine secondary air system to guarantee sufficient confinement of the main gas path, honeycomb seals perform well in terms of enhanced stability and reduced leakage flow. Due ... -
The Effect of Confinement on the Structure and Dynamic Response of Lean Premixed, Swirl Stabilized Flames
(The American Society of Mechanical Engineers (ASME), 2016)The effect of flame–wall interactions on the forced response of a leanpremixed, swirlstabilized flame is experimentally investigated by examining flames in a series of three combustors, each with a different diameter, ... -
Nonlinear Modal Analysis of Mistuned Periodic Structures Subjected to Dry Friction
(The American Society of Mechanical Engineers (ASME), 2016)This paper deals with the dynamics of a cyclic system, representative of a bladed disk subjected to dry friction forces, and exhibits structural mistuning. The nonlinear complex modes are computed by solving the eigenproblem ... -
Implementation, Optimization, and Validation of a Nonlinear Lifting Line Free Vortex Wake Module Within the Wind Turbine Simulation Code qblade
(The American Society of Mechanical Engineers (ASME), 2016)The development of the next generation of large multimegawatt wind turbines presents exceptional challenges to the applied aerodynamic design tools. Because their operation is often outside the validated range of current ... -
Experimental Investigation of a Leaf Seal Prototype at Engine Representative Speeds and Pressures
(The American Society of Mechanical Engineers (ASME), 2016)The application of compliant filament seals to jet engine secondary air systems has been shown to yield significant improvements in specific fuel consumption and improved emissions. One such technology, the leaf seal, ... -
Combustion Characteristics of Stratified Mixture in Lean Burn Liquefied Petroleum Gas Direct Injection Engine With Spray Guided Combustion System
(The American Society of Mechanical Engineers (ASME), 2016)Today, we are faced with the problems of global warming and fossil fuel depletion, and they have led to the enforcement of new emissions regulations. Directinjection sparkignition engines are a very promising technology ... -
Predicting Gas Leakage in the Rotary Engine—Part II: Side Seals and Summary
(The American Society of Mechanical Engineers (ASME), 2016)The Wankel rotary engine offers a greater power density than piston engines, but higher fuel consumption and hydrocarbon emissions, in large part due to poor gas sealing. This paper presents a model for the deformable ... -
Predicting Gas Leakage in the Rotary Engine—Part I: Apex and Corner Seals
(The American Society of Mechanical Engineers (ASME), 2016)The Wankel rotary engine offers a greater power density than piston engines, but higher fuel consumption and higher hydrocarbon emissions, in large part due to poor gas sealing. This paper presents a modeling approach to ... -
The Benefits of an Inverted Brayton Bottoming Cycle as an Alternative to Turbocompounding
(The American Society of Mechanical Engineers (ASME), 2016)The exhaust gas from an internal combustion engine contains approximately 30% of the thermal energy of combustion. Waste heatrecovery systems aim to reclaim a proportion of this energy in a bottoming thermodynamic cycle ... -
Multiphase Flow Large Eddy Simulation Study of the Fuel Split Effects on Combustion Instabilities in an Ultra Low NOx Annular Combustor
(The American Society of Mechanical Engineers (ASME), 2016)This paper describes the application of a coupled acoustic model/largeeddy simulation approach to assess the effect of fuel split on combustion instabilities in an industrial ultralowNOx annular combustor. Multiphase flow ... -
Normalized Knock Intensity Determination Based on the Knock Sensor Analysis to Have a Fixed Detection Threshold at Different Operating Conditions
(The American Society of Mechanical Engineers (ASME), 2016)Processing the knock sensor's signal is the most common approach for knock detection in series production vehicles. Filtration, rectification, and integration in a defined knock window (KW) are main steps to compute the ... -
Experimental Study on the Friction Contact Between a Labyrinth Seal Fin and a Honeycomb Stator
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents results from an extensive experimental study on the rubbing behavior of labyrinth seal fins (SFs) and a honeycomb liner. The objective of the present work is to improve the understanding of the rub ... -
The Physics of H Darrieus Turbine Starting Behavior
(The American Society of Mechanical Engineers (ASME), 2016)This paper provides a resolution to the contradictory accounts of whether or not the Darrieus turbine can selfstart. The paper builds on previous work proposing an analogy between the aerofoil in Darrieus motion and ... -
Flashback Propensity of Turbulent Hydrogen–Air Jet Flames at Gas Turbine Premixer Conditions
(The American Society of Mechanical Engineers (ASME), 2016)The flashback propensity of a premixed jet flame has been studied experimentally. Boundary layer flashback has been investigated under turbulent flow conditions at elevated pressures and temperatures (i.e., 3–8 atm and ... -
Oil Whip Elimination Using Fuzzy Logic Controller
(The American Society of Mechanical Engineers (ASME), 2016)Oil whip is a selfexcited subsynchronous vibration which limits the range of operating speed of journal bearings (JBs). JBs have wide range of applications due to their high loading capacity, simple geometry, and lubrication. ... -
A Shape Memory Alloy Based Morphing Axial Fan Blade—Part II: Blade Shape and Computational Fluid Dynamics Analyses
(The American Society of Mechanical Engineers (ASME), 2016)The ability of a morphing blade to change its geometry according to the different operating conditions represents a challenging approach for the optimization of turbomachinery performance. In this paper, experimental and ... -
Development of a New Factor for Hot Gas Ingestion Through Rim Seal
(The American Society of Mechanical Engineers (ASME), 2016)This article presents a further investigation on the mechanism of hot gas ingestion by exploring the ingress with complicated cavity generated by the rotormounted cylinder protrusion. During the experiment, a cavity with ... -
Comparison Between Linear and Nonlinear Fracture Mechanics Analysis of Experimental Data for the Ductile Superalloy Haynes 230
(The American Society of Mechanical Engineers (ASME), 2016)With increasing use of renewable energy sources, an industrial gas turbine is often a competitive solution to balance the power grid. However, life robustness approaches for gas turbine components operating under increasingly ... -
Isothermal Combustor Prediffuser and Fuel Injector Feed Arm Design Optimization Using the prometheus Design System
(The American Society of Mechanical Engineers (ASME), 2016)The prometheus combustor design system aims to reduce the complexity of evaluating combustor designs by automatically defining preprocessing, simulation, and postprocessing tasks based on the automatic identification of ... -
Experimental and Numerical Investigation of Fuel–Air Mixing in a Radial Swirler Slot of a Dry Low Emission Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents the results of an investigation in which the fuel/air mixing process in a single slot within the radial swirler of a dry low emission (DLE) combustion system is explored using air/air mixing. Experimental ...