Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2021-2040 of 9564
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Static and Rotordynamic Analysis of a Plain Annular (Liquid) Seal in the Laminar Regime With a Swirl Brake for Three Clearances
(The American Society of Mechanical Engineers (ASME), 2019)Tests are reported for a smooth seal with radial clearances 127 μm, 254 μm, 381 μm (1×, 2×, and 3×); length 45.72 mm, diameter 101.6 mm. An insert induced upstream preswirl. Swirl brakes (SBs), comprising 36 square cuts ... -
On the Effect of Engine Pulsations on the Performance of a Turbocharger Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2019)In an internal combustion engine, the centrifugal compressor is placed upstream of the inlet manifold and therefore, it is exposed an unsteady flow regime caused by the inlet valves of the cylinder arrangement. This valve ... -
Large Eddy Simulation and Experimental Analysis of Combustion Dynamics in a Gas Turbine Burner
(The American Society of Mechanical Engineers (ASME), 2019)Large eddy simulations (LES) and experiments (planar laser-induced fluorescence of the hydroxyl radical (OH-PLIF) and pressure transducer) have been carried out on a gas turbine burner fitted to an atmospheric combustion ... -
Numerical Study of Flame Shapes and Structures in a Two-Stage Two-Injection Aeronautical Burner With Variable Fuel Staging Using Eulerian Large Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2019)The aim of the present work is to evaluate the ability of large eddy simulation (LES) to predict flame shape and structures in a two-stage two-injection burner representative of new generation staged aeronautical engine: ... -
Lean-Burn Characteristics of a Heavy-Duty Diesel Engine Retrofitted to Natural-Gas Spark Ignition
(The American Society of Mechanical Engineers (ASME), 2019)Increased utilization of natural gas (NG) in the transportation sector can decrease the use of petroleum-based fuels and reduced greenhouse gas emissions. Heavy-duty diesel engines retrofitted to NG spark ignition (SI) can ... -
A Novel One-Dimensional–Three-Dimensional Coupled Method to Predict Surge Boundary of Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2019)Compression systems are widely employed in gas turbine engines, turbocharged engines, and industry compression plants. The stable work of compression systems is an essential precondition for engine performance and safety. ... -
Capital Cost Assessment of Concentrated Solar Power Plants Based on Supercritical Carbon Dioxide Power Cycles
(The American Society of Mechanical Engineers (ASME), 2019)Previous work by the authors has shown that broader analyses than those typically found in literature (in terms of operating pressures allowed) can yield interesting conclusions with respect to the best candidate cycles ... -
Modeling Deposition in Turbine Cooling Passages With Temperature-Dependent Adhesion and Mesh Morphing
(The American Society of Mechanical Engineers (ASME), 2019)The role of temperature on deposition in gas turbine internal cooling geometries is investigated. Single impingement cones are developed by an oversized (6 mm) impinging jet over a range of temperatures and flow velocities ... -
Dynamic Performance of an Oil Starved Squeeze Film Damper Combined With a Cylindrical Roller Bearing
(The American Society of Mechanical Engineers (ASME), 2019)Squeeze film dampers (SFDs) are widely used to dissipate mechanical energy caused by rotor vibrations as well as to improve overall stability of the rotor system. Especially turbomachine rotors, supported on little damped ... -
Extended Range of Fuel Capability for GT13E2 AEV Burner With Liquid and Gaseous Fuels
(The American Society of Mechanical Engineers (ASME), 2019)The gas turbine market tends to drive development toward higher operational and fuel flexibility. In order to meet these requirements, the GT13E2® combustion system (General Electric, Schenectady, NY) with the AEV® burner ... -
Stall and Surge in Wet Compression: Test Rig Development and Experimental Results
(The American Society of Mechanical Engineers (ASME), 2019)Wet compression is a strategy adopted to increase the power output of gas turbines, with respect to dry conditions, usually also incrementing the operating range of the compressor. However, stall and surge are two aerodynamic ... -
Second-Law Thermodynamic Analysis in Premixed Flames of Ammonia and Hydrogen Binary Fuels
(The American Society of Mechanical Engineers (ASME), 2019)A theoretical analysis based on the second law of thermodynamics was conducted for the ammonia/hydrogen/air premixed flames at different initial pressures. The irreversibility causing exergy losses in premixed flames was ... -
Nonsmooth Thermoelastic Simulations of Blade–Casing Contact Interactions
(The American Society of Mechanical Engineers (ASME), 2019)In turbomachinery, it is well known that tighter operating clearances improve the efficiency. However, this leads to unwanted potential unilateral and frictional contact occurrences between the rotating (blades) and ... -
High-Pressure Oxy-Syngas Ignition Delay Times With CO2 Dilution: Shock Tube Measurements and Comparison of the Performance of Kinetic Mechanisms
(The American Society of Mechanical Engineers (ASME), 2019)In this study, syngas combustion was investigated behind reflected shock waves in CO2 bath gas to measure ignition delay times (IDT) and to probe the effects of CO2 dilution. New syngas data were taken between pressures ... -
Influence of Leakage Flows on Hot Gas Ingress
(The American Society of Mechanical Engineers (ASME), 2019)One of the most important problems facing gas turbine designers today is the ingestion of hot mainstream gases into the wheel-space between the turbine disk (rotor) and its adjacent casing (stator). A rim seal is fitted ... -
Micro Gas Turbine Cycle Humidification for Increased Flexibility: Numerical and Experimental Validation of Different Steam Injection Models
(The American Society of Mechanical Engineers (ASME), 2019)With the current shift from centralized to more decentralized power production, new opportunities arise for small-scale combined heat and power (CHP) production units like micro gas turbines (mGTs). However, to fully embrace ... -
On the Leakage, Torque, and Dynamic Force Coefficients of Air in Oil (Wet) Annular Seal: A Computational Fluid Dynamics Analysis Anchored to Test Data
(The American Society of Mechanical Engineers (ASME), 2019)Subsea pumps and compressors must withstand multiphase flows whose gas volume fraction (GVF) or liquid volume fraction (LVF) varies over a wide range. Gas or liquid content as a dispersed phase in the primary stream affects ... -
Prediction of Aerodynamically Induced Blade Vibrations in a Radial Turbine Rotor Using the Nonlinear Harmonic Approach
(The American Society of Mechanical Engineers (ASME), 2019)Resonant response of turbomachinery blades can lead to high cycle fatigue (HCF) if the vibration amplitudes are excessive. Accurate and reliable simulations of the forced response phenomenon require detailed CFD and FE ... -
Experimental and Numerical Investigations of Novel Natural Gas Low NOx Burners for Heavy Duty Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2019)A novel dry low-NOx gas turbine technology requires well-balanced assessments since the early development phases. The weak knowledge of often conflicting aspects, such as operability and manufacturability, make any roadmap ... -
Thermomechanical Model Reduction for Efficient Simulations of Rotor-Stator Contact Interaction
(The American Society of Mechanical Engineers (ASME), 2019)Turbomachinery rotor–stator unilateral contact induced interactions play a growing role in lifecycle analysis and thus motivate the use of accurate numerical prediction tools. Recent literature confirmed by ongoing in-house ...