Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1821-1840 of 9564
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Liquid Fuel Property Effects on Lean Blowout in an Aircraft Relevant Combustor
(The American Society of Mechanical Engineers (ASME), 2019)This paper describes results from an experimental study on influences of liquid fuel properties on lean blowout (LBO) limits in an aero-type combustor. In particular, this work aimed to elucidate the roles of fuel chemical ... -
Effects of Target Channel Shapes on Double Swirl Cooling Performance at Gas Turbine Blade Leading Edge
(The American Society of Mechanical Engineers (ASME), 2019)In order to further study the effects of the target channel shape on the cooling performance of the double swirl cooling (DSC), five double swirl channels formed by two overlapping elliptic cylinders with different length ... -
An Advanced Surge Dynamic Model for Simulating Emergency Shutdown Events and Comparing Different Antisurge Strategies
(The American Society of Mechanical Engineers (ASME), 2019)The compressor surge is a phenomenon which has to be avoided since it implies the deterioration of performance and leads to mechanical damage to the compressor and system components. As a consequence, compression system ... -
Parametric Study of a Unmanned Aerial Vehicle Ingestion Into a Business Jet Size Fan Assembly Model
(The American Society of Mechanical Engineers (ASME), 2019)This work investigated the damage severity of an unmanned aerial vehicle (UAV) ingestion into fan models of a midsized business jet engine. The ingestion of the quadcopter UAV model into the fan was carried out in ls-dyna. ... -
Simulation of the Transient Thermal Response of a High Pressure Selective Catalytic Reduction Aftertreatment System for a Tier III Two-Stroke Marine Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2019)The IMO tier III legislation, applicable to vessels with a keel laying date from Jan. 1, 2016, has compelled engine builders to apply new technologies for NOx abatement. One of the most promising technologies for tier III ... -
Real-Time Angular Velocity-Based Misfire Detection Using Artificial Neural Networks
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, an artificial neural network (ANN) is introduced in order to detect the occurrence of misfire in an internal combustion (IC) engine by analyzing the crankshaft angular velocity. This study presents three ... -
Flame and Spray Dynamics During the Light-Round Process in an Annular System Equipped With Multiple Swirl Spray Injectors
(The American Society of Mechanical Engineers (ASME), 2019)A successful ignition in an annular multi-injector combustor follows a sequence of steps. The first injector is ignited; two arch-shaped flame branches nearly perpendicular to the combustor backplane form; they propagate, ... -
Mistuning Evaluation Comparison Via As-Manufactured Models, Traveling Wave Excitation, and Compressor Rigs
(The American Society of Mechanical Engineers (ASME), 2019)As-manufactured rotors behave quite differently than nominal as-designed rotors due to small geometric and material property deviations in the rotor, referred to as mistuning. The mistuning of a 20 bladed, integrally bladed ... -
Large Eddy Simulation of Scalar Mixing in Jet in a Cross-Flow
(The American Society of Mechanical Engineers (ASME), 2019)Jet in a cross-flow (JICF) is a flow arrangement found in many engineering applications, especially in gas turbine air–fuel mixing. Understanding of scalar mixing in JICF is important for low NOx burner design and operation, ... -
A Critique on the Research Activities and Potential Benefits of Dual-Fuel Diesel Engines Run on Biogas and Oxygenated Liquid Fuels
(The American Society of Mechanical Engineers (ASME), 2019)The dual fuel concept of diesel engines is gaining popularity because of their ability to use alternative renewable gaseous fuels (natural gas, biogas, producer gas) and liquid fuels (biodiesel, alcohol, and others) ... -
Flame Describing Functions of a Confined Premixed Swirled Combustor With Upstream and Downstream Forcing
(The American Society of Mechanical Engineers (ASME), 2019)The frequency response of a confined premixed swirled flame is explored experimentally through the use of describing functions that depend on both the forcing frequency and the forcing level. In these experiments, the flame ... -
Quantification of the Impact of Uncertainties in Operating Conditions on the Flame Transfer Function With Nonintrusive Polynomial Chaos Expansion
(The American Society of Mechanical Engineers (ASME), 2019)Nonintrusive polynomial chaos expansion (NIPCE) is used to quantify the impact of uncertainties in operating conditions on the flame transfer function (FTF) of a premixed laminar flame. NIPCE requires only a small number ... -
Erosion in Gas-Turbine Grade Ceramic Matrix Composites
(The American Society of Mechanical Engineers (ASME), 2019)Erosion behavior of a large number of gas-turbine grade ceramic matrix composites (CMCs) was assessed using fine to medium grain garnet erodents at velocities of 200 and 300 m/s at ambient temperature. The CMCs used in the ... -
A Critical Analysis on Low-Order Simulation Models for Darrieus Vawts: How Much Do They Pertain to the Real Flow?
(The American Society of Mechanical Engineers (ASME), 2019)To improve the efficiency of Darrieus wind turbines, which still lacks from that of horizontal-axis rotors, computational fluid dynamics (CFD) techniques are now extensively applied, since they only provide a detailed and ... -
A Node-Dependent Kinematic Approach for Rotordynamics Problems
(The American Society of Mechanical Engineers (ASME), 2019)This paper presents the dynamic analysis of rotating structures using node-dependent kinematics (NDK) one-dimensional (1D) elements. These elements have the capabilities to assume a different kinematic at each node of a ... -
Performance and Emission Analysis of Partially Premixed Charge Compression Ignition Combustion
(The American Society of Mechanical Engineers (ASME), 2019)In order to investigate the performance and emissions behavior of a high compression ratio compression ignition (CI) engine operating in partially premixed charge compression ignition (PPCI) mode, a series of experiments ... -
Physics of Deep Surge in an Automotive Turbocharger Centrifugal Compression System
(The American Society of Mechanical Engineers (ASME), 2019)Deep surge is a violent fluid instability that occurs within turbomachinery compression systems and limits the low-flow operating range. It is characterized by large amplitude pressure and flow rate fluctuations, where the ... -
Source Term Based Modeling of Rotating Cavitation in Turbopumps
(The American Society of Mechanical Engineers (ASME), 2019)The recent growth of private options in launch vehicles has substantially raised price competition in the space launch market. This has increased the need to deliver reliable launch vehicles at reduced engine development ... -
Static and Dynamic Analysis of a NACA 0021 Airfoil Section at Low Reynolds Numbers Based on Experiments and Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2019)The wind industry needs airfoil data for ranges of angle of attack (AoA) much wider than those of aviation applications, since large portions of the blades may operate in stalled conditions for a significant part of their ... -
Design and Application of a Multidisciplinary Predesign Process for Novel Engine Concepts
(The American Society of Mechanical Engineers (ASME), 2019)The purpose of this paper is to present a multidisciplinary predesign process and its application to three aero-engine models. First, a twin spool mixed flow turbofan engine model is created for validation purposes. The ...