Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1121-1140 of 9564
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Unsteady Pressure Measurements in a Heated Rotating Cavity
(The American Society of Mechanical Engineers (ASME), 2022)The flow in the heated rotating cavity of an aero-engine compressor is driven by buoyancy forces, which result in pairs of cyclonic and anticyclonic vortices. The resultant cavity flow field is three-dimensional, unsteady, ... -
The Potential of a Separated Electric Compound Spark-Ignition Engine for Hybrid Vehicle Application
(The American Society of Mechanical Engineers (ASME), 2022)In-cylinder expansion of internal combustion engines based on Diesel or Otto cycles cannot be completely brought down to ambient pressure, causing a 20% theoretical energy loss. Several systems have been implemented to ... -
Shapley Additive Explanations of Multigeometrical Variable Coupling Effect in Transonic Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Optimization algorithms in the compressor detailed design stage generate big data of geometries and corresponding performances, but these data are often not exploited efficiently to unveil hidden compressor design guidance. ... -
Influence of Lubricant Film Cavitation on the Vibration Behavior of a Semifloating Ring Supported Turbocharger Rotor With Thrust Bearing
(The American Society of Mechanical Engineers (ASME), 2022)This contribution investigates the influence of outgassing processes on the vibration behavior of a hydrodynamic bearing supported turbocharger rotor. The examined rotor is supported radially by floating rings with outer ... -
Effect of Centrifugal Force on Gas Flow in a Supersonic Turbine
(The American Society of Mechanical Engineers (ASME), 2022)To clarify the loss mechanism in supersonic turbines, the authors experimentally and numerically studied the flow condition between the rotor blades of a supersonic turbine for liquid rocket engines. The entrance Mach ... -
Experimental Data of Supercritical Carbon Dioxide (sCO2) Compressor at Various Fluid States
(The American Society of Mechanical Engineers (ASME), 2022)This paper presents experimental data on a centrifugal compressor operated with CO2. Temperature and pressure at the inlet of the compressor are varied to cover the supercritical region from the liquid-like to the gas-like ... -
Periodic Unsteady Kinematics of Hub Flows in a Shrouded Multistage Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Periodic unsteady flow kinematics in a shrouded multistage low-speed axial compressor has been measured for the first time. Data have been acquired at the inlet and exit of a shrouded third-stage stator with a particular ... -
Effect of Jet-to-Jet Distance and Pipe Position on Flow and Heat Transfer Features of Active Clearance Control Systems
(The American Society of Mechanical Engineers (ASME), 2022)The goal of this work is to investigate the effect of supply pipe position on the heat transfer features of various active clearance control (ACC) geometries, characterized by different jet-to-jet distances. All geometries ... -
Experimental Characterization of Losses in Bladeless Turbine Prototype
(The American Society of Mechanical Engineers (ASME), 2022)Multidisk bladeless turbines, also known as Tesla turbines, are promising in the field of small-scale power generation and energy harvesting due to their low sensitivity to down-scaling effects, retaining high rotor ... -
Multirow Adjoint-Based Optimization of NICFD Turbomachinery Using a Computer-Aided Design-Based Parametrization
(The American Society of Mechanical Engineers (ASME), 2022)Currently, most of the adjoint-based design systems documented in the open literature assume that the fluid behaves as an ideal gas, are restricted to the optimization of a single row of blades, or are not suited to impose ... -
An Investigation on the Discharge Coefficient of Compound Orifices in Rotating Disks
(The American Society of Mechanical Engineers (ASME), 2022)In the modern multishaft gas turbine engines, orifice is an important throttling element, and the discharge coefficient of rotating orifices may vary considerably depending on the operating conditions, the geometry, and ... -
Characterization of a Newly Designed Test Bench for Investigations of Flame–Wall Interaction
(The American Society of Mechanical Engineers (ASME), 2022)For the thermal design of combustion chambers and turbine blades in jet engines, a detailed knowledge of the combustion and of the heat loads to the walls is necessary. In general, high operating temperatures and reduced ... -
Prediction of Pressure Rise in a Gas Turbine Exhaust Duct Under Flameout Scenarios While Operating on Hydrogen and Natural Gas Blends
(The American Society of Mechanical Engineers (ASME), 2022)In recent years, there is a growing interest in blending hydrogen with natural gas fuels to produce low-carbon electricity. It is important to evaluate the safety of gas turbine packages under these conditions, such as ... -
Computational Model of Mechano-Electrochemical Effect of Aluminum Alloys Corrosion
(The American Society of Mechanical Engineers (ASME), 2022)Stress corrosion is a critical issue that leads to high costs in lost equipment and maintenance, affecting the operation and safety of aircraft platforms. Most aerospace structural components use the aluminum alloys 7xxx ... -
Experimental and Numerical Investigation of High-Temperature Multi-Axial Fatigue
(The American Society of Mechanical Engineers (ASME), 2022)Gas turbines and aircraft engines are dominated by cyclic operating modes with fatigue-related loads. This may result in the acceleration of damage development on the components. Critical components of turbine blades and ... -
Assessment of Engine Operability and Overall Performance for Parallel Hybrid Electric Propulsion Systems for a Single-Aisle Aircraft
(The American Society of Mechanical Engineers (ASME), 2022)This paper aims to assess the gas turbine operability and overall hybrid electric propulsion system (HEPS) performance for a parallel configuration applied to a 150 passenger single-aisle aircraft. Two arrangements are ... -
On the Extrapolation of Rim Sealing Performance From Test Bench to Real Engine: A Numerical Survey
(The American Society of Mechanical Engineers (ASME), 2022)The main annulus hot gas ingress into turbine wheel-spaces is still one of the most challenging problems designers face. During the decades, several experimental test benches were developed worldwide to improve the knowledge ... -
Test and Theory for a Refined Structural Model of a Hirth Coupling
(The American Society of Mechanical Engineers (ASME), 2022)Hirth coupling transmits high torques in the rotating assemblies of compressors and turbines. Their mating surface contacts cause local changes in lateral shaft stiffness. This is affected by the teeth geometry, contact ... -
Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures
(The American Society of Mechanical Engineers (ASME), 2022)The initial mechanical response of ceramic matrix composites (CMCs) is linear until the proportional limit. This initial response is characterized by linear elastic properties, which are anisotropic due to the orientation ... -
Prediction of Gas Turbine Trip: A Novel Methodology Based on Random Forest Models
(The American Society of Mechanical Engineers (ASME), 2022)A gas turbine trip is an unplanned shutdown, of which the most relevant consequences are business interruption and a reduction of equipment remaining useful life. Thus, understanding the underlying causes of gas turbine ...