Journal of Turbomachinery: Recent submissions
Now showing items 741-760 of 4519
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Development and Application of a Concentration Probe for Mixing Flows Tracking in Turbomachinery Applications
(The American Society of Mechanical Engineers (ASME), 2021)Modern gas turbines present important temperature distortions in the core-engine flowpath, mainly in the form of hot and cold streaks imputed to combustor burners and components cooling systems. As they highly influence ... -
Loss Characterization of Advanced VIGV Configurations With Adjustable Blade Geometry
(The American Society of Mechanical Engineers (ASME), 2021)Variable inlet guide vanes (VIGV) are the main control element to adjust the flow rate of industrial centrifugal compressors by customized pre-swirl in the inlet plane of the impeller. The efficient working range of VIGVs ... -
Microstructure of IN738LC Fabricated Using Laser Powder Bed Fusion Additive Manufacturing
(The American Society of Mechanical Engineers (ASME), 2021)Nickel-base superalloys are extensively used in the production of gas turbine hot-section components as they offer exceptional creep strength and superior fatigue resistance at high temperatures. Such improved properties ... -
Impact of Swirling Entropy Waves on a High Pressure Turbine
(The American Society of Mechanical Engineers (ASME), 2021)The harsh environment exiting modern gas turbine combustion chamber is characterized by vorticity and temperature perturbations, the latter commonly referred as entropy waves. The interaction of these unsteadiness with the ... -
Heat Transfer Measurements for Array Jet Impingement With Castellated Wall
(The American Society of Mechanical Engineers (ASME), 2021)Impingement cooling is one of the powerful cooling methods in high-temperature devices. For the gas turbine applications, impingement cooling is commonly applied in the transition piece of a combustor and in the leading ... -
Novel Focal Sweep Strategy for Optical Aerothermal Measurements of Film-Cooled Gas Turbine Blades With Highly Inclined Viewing Angle
(The American Society of Mechanical Engineers (ASME), 2021)The viewing angle for optical aerothermal measurements on turbine surfaces is often limited by the turbine structure, requiring the optical system to have a large depth of field (DoF). Although the DoF can be increased by ... -
Statistical Error Estimation Methods for Engineering-Relevant Quantities From Scale-Resolving Simulations
(The American Society of Mechanical Engineers (ASME), 2021)Scale-resolving simulations, such as large eddy simulations, have become affordable tools to investigate the flow in turbomachinery components. The resulting time-resolved flow field is typically analyzed using first- and ... -
Aerodynamic Functional Diagnostics Based on Angular Momentum Transport Lines
(The American Society of Mechanical Engineers (ASME), 2021)In analogy with the classical concept of mass-flux-based streamlines, we define angular momentum transport (AMT) lines as an aerodynamic functional diagnostic tool. The AMT lines are the ones whose tangents are given by ... -
Impact of Ceramic Matrix Composite Topology on Friction Factor and Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2021)Ceramic matrix composites (CMCs) are of interest for hot section components of gas turbine engines due to their low weight and favorable thermal properties. To implement this advanced composite in a gas turbine engine, ... -
Evaluating the Influence of Rotor-Casing Eccentricity on Turbine Efficiency Including Time-Resolved Flow Field Measurements
(The American Society of Mechanical Engineers (ASME), 2021)The clearance that exists between the casing and turbine blade tips is one of the key drivers of efficiency in gas turbine engines. For this reason, engine manufacturers utilize precise manufacturing techniques and may use ... -
Heat Transfer in a Rotating, Blade-Shaped, Two-Pass Cooling Channel With a Variable Aspect Ratio
(The American Society of Mechanical Engineers (ASME), 2021)This study features a rotating, blade-shaped, two-pass cooling channel with a variable aspect ratio (AR). Internal cooling passages of modern gas turbine blades closely follow the shape and contour of the airfoils. Therefore, ... -
Stall Behavior in an Ultrahigh-Pressure-Ratio Centrifugal Compressor: Backward-Traveling Rotating Stall
(The American Society of Mechanical Engineers (ASME), 2022)This paper describes the stall mechanism in an ultrahigh-pressure-ratio centrifugal compressor, composed of a double-splitter impeller, radial diffuser, and axial diffuser. A model comprising all impeller and diffuser blade ... -
Numerical Investigation of the Fan Flutter Mechanism Related to Acoustic Propagation Characteristics
(The American Society of Mechanical Engineers (ASME), 2022)In this study, the flutter mechanism related to acoustic propagation characteristics of a wide-chord fan rotor was investigated numerically. The first bending mode and its two and three nodal diameters traveling wave ... -
Low Reynolds Number Effects on the Separation and Wake of a Compressor Blade
(The American Society of Mechanical Engineers (ASME), 2022)This paper investigates the surface boundary layer and wake development of a compressor blade at a range of low Reynolds number from 45,000 to 120,000. Experiments in a miniature linear compressor cascade facility have ... -
Progresses in Particle-Laden Flows Simulations in Multistage Turbomachinery With OpenFOAM
(The American Society of Mechanical Engineers (ASME), 2022)Numerical simulations of particle-laden flows have received growing attention in the last decade, due to the broad spectrum of industrial applications in which discrete phases prediction is of interest. Among these, ingestion ... -
Optimization of a Tip Appendage for the Control of Tip Leakage Vortices in Axial Flow Fans
(The American Society of Mechanical Engineers (ASME), 2022)This paper presents the numerical optimization of a tip appendage design for the passive control of tip leakage vortices in subsonic axial flow cooling fans. The studied class of fan was designed in the conventional manner ... -
Influence of Supersonic Nozzle Design Parameters on the Unsteady Stator–Rotor Interaction in Radial-Inflow Turbines for Organic Rankine Cycles
(The American Society of Mechanical Engineers (ASME), 2022)The use of radial-inflow turbine (RIT) for organic Rankine cycle (ORC) plant sizes below 100 kW is promising, although the application remains challenging. In fact, the single-stage arrangement imposed by economic constraints ... -
Performance Improvement of a Mixed Flow Turbine Using 3D Blading
(The American Society of Mechanical Engineers (ASME), 2022)Mixed flow turbines have reached a level of maturity where iterative performance improvements are very small, with real performance benefits coming from better matching to a given application as opposed to improvements in ... -
An Analysis of the Secondary Flow Around a Tandem Blade Under the Presence of a Tip Gap in a High-Speed Linear Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2022)Tandem blades have often been under investigation, experimentally as well as numerically, but most of the studies have been about tandem blade stators without tip gap. This work analyzes the influence of a tip gap on the ... -
Inlet Flow Distortion in an Advanced Civil Transport Boundary Layer Ingesting Engine Installation
(The American Society of Mechanical Engineers (ASME), 2022)This article presents first-of-a-kind measurements, and complementary computations, of the flow through the propulsion system of a boundary layer ingesting, twin-engine advanced civil transport aircraft configuration. The ...